Brake Light is on. Premies or anyone help! Thanks - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Okinawandrifter87 · 07-03-2008, 03:32 PM

Hey all. I have a 1991 DOHC auto hatch. Ok so ive hit the search button and typed in brake light, buzzing brake light, buzzing dash etc etc. The only thread that sounded sort of similar to mine was this one http://www.zilvia.net/f/showthread.p...ng+brake+light . So I was starting to think that it was my alternator when I went to go get it tested out at autozone. They said that my diode pattern is good so my alternator is good as well. I knew my battery was bad so i replaced it as well. The brake light is on and im still getting the buzzing noise as mentioned in the other thread. All my brake pads are new and installed properly and I even have a new BMC as well and made sure the little clip installed next to it is installed. Thanks. All help is appreciated and if helpful rep will be rewarded!

These are some of the sypmtoms =
The buzzing sound like it could be coming from the dash or behind the cluster or even by the fuse panel by my feet, its hard to tell. It only happens when im driving down the road 30mph+ and then the buzzing will occur only till I let my foot off of the gas pedal, then the buzzing stops for a couple seconds. Its a repetetive process. The buzzing happens every 8-10 second gap from when i lift my foot off the gas to when i step on the gas again. While the buzzing noise is occuring the brake light on the dash goes off but when i lift my foot off the gas and the buzzing stops the light comes back on =0/

**mrmephistopheles** · 07-03-2008, 03:35 PM

It still might be the alternator. I've experienced the buzzing symptom, as well as the brake light being on, and it was my alternator. It was still charging just fine, but changing it to a different one solved the problem.

RedtopTech · 07-03-2008, 03:36 PM

is the fluid in the bmc topped off? the float may be stuck. tap on the resurvoir.
E-brake switch may be stuck. take off the console and check the switch

g6civcx · 07-03-2008, 04:04 PM

Brake light in the back or on the dash?

projectRDM · 07-03-2008, 04:08 PM

You have to load test the alternator, off the car. The machine they use can measure output voltage but if the regulator has a hot spot it may not show bad until it warms up or is under load. That's why I don't trust those places.

Okinawandrifter87 · 07-03-2008, 06:59 PM

Alright cool thanks guys, I will def have to check my alternator the alternate way by doing the load test and yeah i was kinda leer about taking it to them to see if it was good or not. The bmc is fine topped off properly and all. And sorry I mean the brake light in the dash. Thanks everyone for the helpful input. I am going to load test the alternator this weekend.

Okinawandrifter87 · 07-21-2008, 10:24 AM

Update. Ok so Ive replaced the alternator and ive replaced the battery as well. Ive also checked the ebrake sensor and its not that either. The rear pads are at 50% and im going to be replacing those as well but I dont think that would cause the buzzing sound either? Any further suggestions? Thanks! All help appreciated!

jorge1190 · 07-21-2008, 10:27 AM

there is two sensors that are pushed in by your brake pedal when you realease the brake...the one to the right(if you are looking at your brake pedal straight) is the brake light switch. make sure the plastic piece that presses this in didnt fall out or it might need adjusting

Okinawandrifter87 · 07-21-2008, 10:35 AM

Awesome. I will take a look at this as well. Thanks! Keep ideas and suggestions coming and I will update you. Thanks again!

ROIDMONKEY · 07-21-2008, 10:59 AM

Quote:

Originally Posted by jorge1190

there is two sensors that are pushed in by your brake pedal when you realease the brake...the one to the right(if you are looking at your brake pedal straight) is the brake light switch. make sure the plastic piece that presses this in didnt fall out or it might need adjusting

had that problem and was that

Okinawandrifter87 · 07-21-2008, 11:07 AM

Awesome. Ill def make sure to look at that first thing when I get home. Would it cause the buzzing noise too or just the light?

jrocslider · 07-21-2008, 11:12 AM

Quote:

Originally Posted by jorge1190

there is two sensors that are pushed in by your brake pedal when you realease the brake...the one to the right(if you are looking at your brake pedal straight) is the brake light switch. make sure the plastic piece that presses this in didnt fall out or it might need adjusting

this also happened to my lil brothers car before. check the brake light switch behind the brake pedal. thats most likely your problem.

Okinawandrifter87 · 07-21-2008, 11:18 AM

Cool thanks. +rep peeps.

g6civcx · 07-21-2008, 11:22 AM

Quote:

Originally Posted by Okinawandrifter87

I mean the brake light in the dash.

Quote:

Originally Posted by jorge1190

there is two sensors that are pushed in by your brake pedal when you realease the brake...the one to the right(if you are looking at your brake pedal straight) is the brake light switch. make sure the plastic piece that presses this in didnt fall out or it might need adjusting

Quote:

Originally Posted by jrocslider

check the brake light switch behind the brake pedal. thats most likely your problem.

Please explain to me why the brake light switch on the pedal would affect the brake light in the dash?

Okinawandrifter87 · 07-21-2008, 11:48 AM

Yeah Im curious too if someone could explain it for me. Thanks!

g6civcx · 07-21-2008, 11:51 AM

The solution they talked about works for a rear exterior brake light that is always stuck on. The rubber spacer hits the plunger on the brake light switch to tell the car that the brake pedal is no longer being depressed.

Missing this spacer will make the car think that the brake is always on because nothing is hitting the plunger.

I didn't know which brake lights you were talking about so I asked. I guess they didn't see your answer and assumed that it was the outside lights.

ROIDMONKEY · 07-21-2008, 11:56 AM

cause the brake light switch make contact to that plastic peace so pretty much when pedal is off the the plastic peace push the pin switch telling the brake light to shut off. so when u brake pin switch open making the brake lights to work , its like your door pin switch when u push them dome light off if u release the door pin lights on , same thing for the brake, but instead of the door pressing the switch on the brake pedal what push the switch is a plastic peace that fall down some times .

Okinawandrifter87 · 07-21-2008, 11:59 AM

Quote:

Originally Posted by g6civcx

The solution they talked about works for a rear exterior brake light that is always stuck on. The rubber spacer hits the plunger on the brake light switch to tell the car that the brake pedal is no longer being depressed.

Missing this spacer will make the car think that the brake is always on because nothing is hitting the plunger.

I didn't know which brake lights you were talking about so I asked. I guess they didn't see your answer and assumed that it was the outside lights.

Yeah and my problem is the brake light on the dash not on the outside brake lights. =0(

g6civcx · 07-21-2008, 12:12 PM

Quote:

Originally Posted by ROIDMONKEY

cause the brake light switch make contact to that plastic peace so pretty much when pedal is off the the plastic peace push the pin switch telling the brake light to shut off. so when u brake pin switch open making the brake lights to work , its like your door pin switch when u push them dome light off if u release the door pin lights on , same thing for the brake, but instead of the door pressing the switch on the brake pedal what push the switch is a plastic peace that fall down some times .

Read the OP's posts again.

Sileighty_85 · 07-21-2008, 12:15 PM

When does this buzzing occur? Only when the car is on? Or all the time?
What area is it coming from?

Okinawandrifter87 · 07-21-2008, 12:29 PM

It sounds like it could be coming from the dash or behind the cluster or even by the fuse panel by my feet, its hard to tell. It only happens when im driving down the road 30mph+ and then the buzzing will occur only till I let my foot off of the gas pedal, then the buzzing stops for a couple seconds. Its a repetetive process. The buzzing happens every 8-10 second gap from when i lift my foot off the gas to when i step on the gas again. While the buzzing noise is occuring the brake light on the dash goes off but when i lift my foot off the gas and the buzzing stops the light comes back on =0/

GSXRJJordan · 07-21-2008, 01:14 PM

haha that's so fuckin weird... I'm clueless.

Okinawandrifter87 · 07-21-2008, 01:44 PM

Haha your telling me!! Which is why I feel so flustered cause I cant search it cause nothing is like it.. a couple close stories but not similar all the way..ugh.. I want to fix this thing lol the girlfriend is tired of driving with music loud to drown out the buzzing lol.

*radhaz* · 07-21-2008, 01:55 PM

Just curious but do you have ABS? You may find some of the info from the FSM braking section to be helpful http://www.240edge.com/manuals/91-94_240sx/br.pdf If you further isolate where the buzzing is originating let us know as it might help to give you more help in what direction to pursue. To me a "buzzing" sound leans towards a relay being toggled or something shorting out and arcing but that's unlikely because more than likely with an errant ground you'd have more problems that what you're having now. Good luck!

jorge1190 · 07-21-2008, 02:03 PM

when i had a caliper blow out my brake light on the dash stayed on for a few days i just messed with the e brake a lil bit but i would pull the console up and check under there

axiomatik · 07-21-2008, 02:57 PM

man, you need to re-write your original post. I read the whole thread and I still don't know what problem you are having. You need to lay out in a clear and concise manner what symptoms you are experiencing, because just listing the search terms you used doesn't tell us much.

DreamN · 07-21-2008, 03:08 PM

dash brake light is on. when car is going 30+ mph it makes buzzing sound. buzzing sound disappears when car is decelerating. that's pretty much the jist of it right?

have you checked all your fuses? Usually when the alternator is bad the brake light and battery light turn on simultaneously so I wouldn't think it's that. Have you checked your ebrake?

Okinawandrifter87 · 07-21-2008, 03:26 PM

Actually now that I think about it the only thing I havent done was check the alt fuse in the engine bay =0( how stupid. Ive replaced the alternator and battery already. Im gonna have to check that out asap after work. Sorry for not being clear and concise to begin with guys. Thanks for putting up with it and helping.

07-03-2008, 03:32 PM	#1
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Brake Light is on. Premies or anyone help! Thanks Hey all. I have a 1991 DOHC auto hatch. Ok so ive hit the search button and typed in brake light, buzzing brake light, buzzing dash etc etc. The only thread that sounded sort of similar to mine was this one http://www.zilvia.net/f/showthread.p...ng+brake+light . So I was starting to think that it was my alternator when I went to go get it tested out at autozone. They said that my diode pattern is good so my alternator is good as well. I knew my battery was bad so i replaced it as well. The brake light is on and im still getting the buzzing noise as mentioned in the other thread. All my brake pads are new and installed properly and I even have a new BMC as well and made sure the little clip installed next to it is installed. Thanks. All help is appreciated and if helpful rep will be rewarded! These are some of the sypmtoms = The buzzing sound like it could be coming from the dash or behind the cluster or even by the fuse panel by my feet, its hard to tell. It only happens when im driving down the road 30mph+ and then the buzzing will occur only till I let my foot off of the gas pedal, then the buzzing stops for a couple seconds. Its a repetetive process. The buzzing happens every 8-10 second gap from when i lift my foot off the gas to when i step on the gas again. While the buzzing noise is occuring the brake light on the dash goes off but when i lift my foot off the gas and the buzzing stops the light comes back on =0/ __________________ Driftphreak87 Last edited by Okinawandrifter87; 07-21-2008 at 03:24 PM.. Reason: symptoms

07-03-2008, 04:08 PM	#5
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 51 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	You have to load test the alternator, off the car. The machine they use can measure output voltage but if the regulator has a hot spot it may not show bad until it warms up or is under load. That's why I don't trust those places. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

07-03-2008, 06:59 PM	#6
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Alright cool thanks guys, I will def have to check my alternator the alternate way by doing the load test and yeah i was kinda leer about taking it to them to see if it was good or not. The bmc is fine topped off properly and all. And sorry I mean the brake light in the dash. Thanks everyone for the helpful input. I am going to load test the alternator this weekend. __________________ Driftphreak87

07-21-2008, 10:24 AM	#7
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Update. Ok so Ive replaced the alternator and ive replaced the battery as well. Ive also checked the ebrake sensor and its not that either. The rear pads are at 50% and im going to be replacing those as well but I dont think that would cause the buzzing sound either? Any further suggestions? Thanks! All help appreciated! __________________ Driftphreak87

07-21-2008, 10:35 AM	#9
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Awesome. I will take a look at this as well. Thanks! Keep ideas and suggestions coming and I will update you. Thanks again! __________________ Driftphreak87

07-03-2008, 03:36 PM	#3
RedtopTech Zilvia Member Join Date: Dec 2005 Location: Virginia Beach, VA Age: 40 Posts: 293 Trader Rating: (0) Feedback Score: 0 reviews	is the fluid in the bmc topped off? the float may be stuck. tap on the resurvoir. E-brake switch may be stuck. take off the console and check the switch

07-03-2008, 04:04 PM	#4
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	Brake light in the back or on the dash?

07-21-2008, 10:27 AM	#8
jorge1190 Zilvia Junkie Join Date: Mar 2008 Location: Culpeper, Va Age: 34 Posts: 593 Trader Rating: (12) Feedback Score: 12 reviews	there is two sensors that are pushed in by your brake pedal when you realease the brake...the one to the right(if you are looking at your brake pedal straight) is the brake light switch. make sure the plastic piece that presses this in didnt fall out or it might need adjusting

07-21-2008, 11:07 AM	#11
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Awesome. Ill def make sure to look at that first thing when I get home. Would it cause the buzzing noise too or just the light? __________________ Driftphreak87

07-21-2008, 11:18 AM	#13
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Cool thanks. +rep peeps. __________________ Driftphreak87

07-21-2008, 11:48 AM	#15
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Yeah Im curious too if someone could explain it for me. Thanks! __________________ Driftphreak87

07-21-2008, 11:51 AM	#16
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	The solution they talked about works for a rear exterior brake light that is always stuck on. The rubber spacer hits the plunger on the brake light switch to tell the car that the brake pedal is no longer being depressed. Missing this spacer will make the car think that the brake is always on because nothing is hitting the plunger. I didn't know which brake lights you were talking about so I asked. I guess they didn't see your answer and assumed that it was the outside lights.

07-21-2008, 11:56 AM	#17
ROIDMONKEY Nissanaholic! Join Date: Jul 2007 Location: HollyFLORIDA Posts: 2,027 Trader Rating: (4) Rides Gallery: ROIDMONKEY Feedback Score: 4 reviews	cause the brake light switch make contact to that plastic peace so pretty much when pedal is off the the plastic peace push the pin switch telling the brake light to shut off. so when u brake pin switch open making the brake lights to work , its like your door pin switch when u push them dome light off if u release the door pin lights on , same thing for the brake, but instead of the door pressing the switch on the brake pedal what push the switch is a plastic peace that fall down some times . __________________ TRUE thing: True ////OFFSET\\\\ is acheived without spacers Running on E85 570whp Precision 5862....laggy as fuck. hate it

07-21-2008, 12:15 PM	#20
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	When does this buzzing occur? Only when the car is on? Or all the time? What area is it coming from? __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-21-2008, 12:29 PM	#21
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	It sounds like it could be coming from the dash or behind the cluster or even by the fuse panel by my feet, its hard to tell. It only happens when im driving down the road 30mph+ and then the buzzing will occur only till I let my foot off of the gas pedal, then the buzzing stops for a couple seconds. Its a repetetive process. The buzzing happens every 8-10 second gap from when i lift my foot off the gas to when i step on the gas again. While the buzzing noise is occuring the brake light on the dash goes off but when i lift my foot off the gas and the buzzing stops the light comes back on =0/ __________________ Driftphreak87

07-21-2008, 01:14 PM	#22
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	haha that's so fuckin weird... I'm clueless. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

07-21-2008, 01:44 PM	#23
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Haha your telling me!! Which is why I feel so flustered cause I cant search it cause nothing is like it.. a couple close stories but not similar all the way..ugh.. I want to fix this thing lol the girlfriend is tired of driving with music loud to drown out the buzzing lol. __________________ Driftphreak87

07-21-2008, 01:55 PM	#24
radhaz Premium Member Join Date: Apr 2003 Location: SD SoCal / Jax, Fl Posts: 659 Trader Rating: (0) Feedback Score: 0 reviews	Just curious but do you have ABS? You may find some of the info from the FSM braking section to be helpful http://www.240edge.com/manuals/91-94_240sx/br.pdf If you further isolate where the buzzing is originating let us know as it might help to give you more help in what direction to pursue. To me a "buzzing" sound leans towards a relay being toggled or something shorting out and arcing but that's unlikely because more than likely with an errant ground you'd have more problems that what you're having now. Good luck! __________________ Need a 96 driver side window switch. Feel free to pm me with a price

07-21-2008, 02:03 PM	#25
jorge1190 Zilvia Junkie Join Date: Mar 2008 Location: Culpeper, Va Age: 34 Posts: 593 Trader Rating: (12) Feedback Score: 12 reviews	when i had a caliper blow out my brake light on the dash stayed on for a few days i just messed with the e brake a lil bit but i would pull the console up and check under there

07-21-2008, 02:57 PM	#26
axiomatik Post Whore! Join Date: Dec 2003 Location: ATL Posts: 4,702 Trader Rating: (0) Feedback Score: 0 reviews	man, you need to re-write your original post. I read the whole thread and I still don't know what problem you are having. You need to lay out in a clear and concise manner what symptoms you are experiencing, because just listing the search terms you used doesn't tell us much. __________________

07-21-2008, 03:08 PM	#27
DreamN Post Whore! Join Date: Nov 2006 Location: SoCal - 818 Age: 40 Posts: 10,692 Trader Rating: (54) Rides Gallery: DreamN Feedback Score: 54 reviews	dash brake light is on. when car is going 30+ mph it makes buzzing sound. buzzing sound disappears when car is decelerating. that's pretty much the jist of it right? have you checked all your fuses? Usually when the alternator is bad the brake light and battery light turn on simultaneously so I wouldn't think it's that. Have you checked your ebrake? __________________ - Jimmy Wanted: TBD For Sale: TBD

07-21-2008, 03:26 PM	#28
Okinawandrifter87 Post Whore! Join Date: Jun 2006 Location: Sacramento, CA Posts: 3,959 Trader Rating: (22) Feedback Score: 22 reviews	Actually now that I think about it the only thing I havent done was check the alt fuse in the engine bay =0( how stupid. Ive replaced the alternator and battery already. Im gonna have to check that out asap after work. Sorry for not being clear and concise to begin with guys. Thanks for putting up with it and helping. __________________ Driftphreak87