Alternator won't charge, what tells it to turn on? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

cmcdougle · 11-18-2006, 07:02 PM

My alternator won't charge in my rb20det. All the wiring should be there, but it isn't working for some reason. What tells the alternator to turn on? Where does that wire run?

The wiring is the same as it was in the Skyline (I laid the dash harness in as well as the engine harness).

Thanks!

*ManoNegra* · 11-18-2006, 07:26 PM

Check your fuses. FSM is your friend.

cmcdougle · 11-18-2006, 08:09 PM

I've checked them. Where is the FSM? I lost the link.

HalveBlue · 11-18-2006, 08:54 PM

www.camel-towing.com for FSM

yokotas13 · 11-18-2006, 08:57 PM

how do you know its the alternator?
start the car and take off one of the battery terminals. it should still run if the alternator is good. theoretically.
could just be a horrible battery as well.

cmcdougle · 11-19-2006, 12:12 AM

it's the alternator. The car dies unless I charge the battery with a charger, and there is a .3-.4 volt difference in the battery before and after the car starts. I had the alternator tested, and it is good, so it is wiring somewhere, not being told to turn on or something. I tried a new battery as well.

Antone · 11-20-2006, 03:22 PM

I had same problem. The wire running to the alternator was grounding out...This is for a KA so not too sure it will work for RB. A WHOLE new set of alternator wires did the trick for me!

NiSilS14 · 11-21-2006, 01:10 AM

check out the connections to the connector. Check to see if there is any corrosion or if it is loose. A lot of times connections come loose or get corroded. If it that doesn't seem to be the problem. You can use a volt-meter to see if you might have a break in the wire.

11-18-2006, 07:02 PM	#1
cmcdougle Zilvia FREAK! Join Date: May 2006 Location: Irvine, CA Posts: 1,361 Trader Rating: (0) Feedback Score: 0 reviews	Alternator won't charge, what tells it to turn on? My alternator won't charge in my rb20det. All the wiring should be there, but it isn't working for some reason. What tells the alternator to turn on? Where does that wire run? The wiring is the same as it was in the Skyline (I laid the dash harness in as well as the engine harness). Thanks! __________________

11-18-2006, 08:09 PM	#3
cmcdougle Zilvia FREAK! Join Date: May 2006 Location: Irvine, CA Posts: 1,361 Trader Rating: (0) Feedback Score: 0 reviews	I've checked them. Where is the FSM? I lost the link. __________________

11-18-2006, 08:57 PM	#5
yokotas13 Post Whore! Join Date: Apr 2006 Location: Milford, CT Age: 40 Posts: 10,519 Trader Rating: (8) Rides Gallery: yokotas13 Feedback Score: 8 reviews	how do you know its the alternator? start the car and take off one of the battery terminals. it should still run if the alternator is good. theoretically. could just be a horrible battery as well. __________________ 2015 Subaru Outback Overlander - Wagonofdoom

11-19-2006, 12:12 AM	#6
cmcdougle Zilvia FREAK! Join Date: May 2006 Location: Irvine, CA Posts: 1,361 Trader Rating: (0) Feedback Score: 0 reviews	it's the alternator. The car dies unless I charge the battery with a charger, and there is a .3-.4 volt difference in the battery before and after the car starts. I had the alternator tested, and it is good, so it is wiring somewhere, not being told to turn on or something. I tried a new battery as well. __________________

11-18-2006, 07:26 PM	#2
ManoNegra Guild of Skullduggerous Intent Join Date: Jan 2004 Location: Socal Posts: 7,841 Trader Rating: (48) Feedback Score: 48 reviews	Check your fuses. FSM is your friend.

11-18-2006, 08:54 PM	#4
HalveBlue Zilvia FREAK! Join Date: Mar 2004 Location: I'm somewhere where I don't know where I am! Posts: 1,549 Trader Rating: (0) Feedback Score: 0 reviews	www.camel-towing.com for FSM

11-20-2006, 03:22 PM	#7
Antone Leaky Injector Join Date: Feb 2006 Location: Los Angeles Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	I had same problem. The wire running to the alternator was grounding out...This is for a KA so not too sure it will work for RB. A WHOLE new set of alternator wires did the trick for me!

11-21-2006, 01:10 AM	#8
NiSilS14 Zilvia Junkie Join Date: Sep 2003 Location: Denver, CO Posts: 569 Trader Rating: (20) Feedback Score: 20 reviews	check out the connections to the connector. Check to see if there is any corrosion or if it is loose. A lot of times connections come loose or get corroded. If it that doesn't seem to be the problem. You can use a volt-meter to see if you might have a break in the wire.