Positively grounded battery? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

mytagsucks · 06-07-2012, 02:51 PM

Just picked up a sr20 swapped s13, and am trying to get it running to see what I have. The problem is, with the battery relocation that was done by the previous owner, the battery is positively grounded. I've searched pretty hard to find anyone else that has this done and I can't seem to find anything.

Is this even possible? Or is this car just cross wired?
I'm hoping to not fry my ecu, and other ignition parts if they haven't been already so I'm afraid to switch the cables around.

The car does have lights on in the interior when it is hooked up as is (positively grounded).

Any help would be awesome

240sxluver4life · 06-07-2012, 02:57 PM

switch em back, yes its possible but i dont have the patience to explain what goes into it.

take an electronics class if u want to know

mytagsucks · 06-07-2012, 03:04 PM

Quote:

Originally Posted by 240sxluver4life

switch em back, yes its possible but i dont have the patience to explain what goes into it.

take an electronics class if u want to know

I'm trying to avoid just switching them back hoping that I don't blow the ecu and other ignition parts. The 75A fuse is popped, and when I put another in it popped pretty quickly.

240sxluver4life · 06-07-2012, 03:00 PM

ecu is possibly fried. maybe not though.

take out the cps and spin it to see if you have spark or fuel injectors firing.

check all fuses first. ALL of them

delado · 06-07-2012, 03:03 PM

You should be fine. I use to drift my old hatch, and had the battery "relocated" to the trunk and that shit would fly everywhere. It basically looked like 4 of July in the back of my car at night.

Kingtal0n · 06-10-2012, 12:23 PM

Quote:

Originally Posted by delado

You should be fine. I use to drift my old hatch, and had the battery "relocated" to the trunk and that shit would fly everywhere. It basically looked like 4 of July in the back of my car at night.

rofl

PureRush · 06-07-2012, 11:57 PM

Switch the fuckin cables back to where they're supposed to be. What are you waiting for? The 75 amp fuse being popped is not a good sign

codyace · 06-09-2012, 10:46 PM

1. It doens' matter 'which' pole you use, so long as it's consistant. That is, if your grounds are all 'negative' then that's what you'll use. If your ground is the positive pole, than all '12v+' sources will need to be the opposite of normal. A battery doesn't know/nor care what side is which, as long as it's the same.

2. Your car is 12v, not 6v.

Switch it back, and be happy.

E30Napalm · 06-10-2012, 10:23 AM

My brother had a 1957 morris oxford. It was a positive ground.
Lucas electrical at its finest!

codyace · 06-11-2012, 09:32 PM

Quote:

Originally Posted by E30Napalm

My brother had a 1957 morris oxford. It was a positive ground.
Lucas electrical at its finest!

Lucas, the inventor of darkness

06-07-2012, 02:51 PM	#1
mytagsucks Leaky Injector Join Date: Jul 2009 Location: Chicago Posts: 135 Trader Rating: (3) Feedback Score: 3 reviews	Positively grounded battery? Just picked up a sr20 swapped s13, and am trying to get it running to see what I have. The problem is, with the battery relocation that was done by the previous owner, the battery is positively grounded. I've searched pretty hard to find anyone else that has this done and I can't seem to find anything. Is this even possible? Or is this car just cross wired? I'm hoping to not fry my ecu, and other ignition parts if they haven't been already so I'm afraid to switch the cables around. The car does have lights on in the interior when it is hooked up as is (positively grounded). Any help would be awesome

06-09-2012, 10:46 PM	#8
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	1. It doens' matter 'which' pole you use, so long as it's consistant. That is, if your grounds are all 'negative' then that's what you'll use. If your ground is the positive pole, than all '12v+' sources will need to be the opposite of normal. A battery doesn't know/nor care what side is which, as long as it's the same. 2. Your car is 12v, not 6v. Switch it back, and be happy. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

06-07-2012, 02:57 PM	#2
240sxluver4life Zilvia Member Join Date: Feb 2010 Location: Santa Fe NM Age: 31 Posts: 286 Trader Rating: (0) Feedback Score: 0 reviews	switch em back, yes its possible but i dont have the patience to explain what goes into it. take an electronics class if u want to know

06-07-2012, 03:00 PM	#4
240sxluver4life Zilvia Member Join Date: Feb 2010 Location: Santa Fe NM Age: 31 Posts: 286 Trader Rating: (0) Feedback Score: 0 reviews	ecu is possibly fried. maybe not though. take out the cps and spin it to see if you have spark or fuel injectors firing. check all fuses first. ALL of them

06-07-2012, 11:57 PM	#7
PureRush Zilvia Addict Join Date: Oct 2011 Location: Orange County Posts: 893 Trader Rating: (15) Feedback Score: 15 reviews	Switch the fuckin cables back to where they're supposed to be. What are you waiting for? The 75 amp fuse being popped is not a good sign

06-10-2012, 10:23 AM	#9
E30Napalm Join Date: May 2011 Location: Edmonton Alberrrrrta Age: 52 Posts: 25 Trader Rating: (0) Feedback Score: 0 reviews	My brother had a 1957 morris oxford. It was a positive ground. Lucas electrical at its finest!