Wires To Alternator Help

SuperSpartan · 01-14-2010, 08:07 AM

Whats the three wires that join into a plug into the back of the alternator on a 1990 Turbo?

It heads from the back of the alternator to the bottom of the fuse box. The wires are cut due to years of being angeled, i need to replace it. Could be the issue why my batt doesn't charge. Im wondering where or how i can replace this.

cre · 01-14-2010, 05:19 PM

http://www.cygnusx1.net/Supra/Librar...x?S=Main&P=042

SuperSpartan · 01-15-2010, 01:09 AM

Thanks seems like i have to get down in wiring it my way though correct? Since i do not think they sell any cables just for that.

cre · 01-15-2010, 01:12 AM

I don't understand what you are asking there.

Call a Toyota dealer in your area, they may be able to order a pigtail you can just splice on, otherwise replacement plugs and terminals are available and you can do it yourself.

SuperSpartan · 01-15-2010, 01:37 AM

haha its alright ill do just that. Thanks for the wiring reference however

very helpful since my bay looks like a pit of snakes tangled with vines.

MA70-3.0GT · 03-04-2010, 06:37 PM

Thought I'd post my charging issues in here so as not to start another thread, I've got to check the wiring out with my multimeter yet but was wondering if anyone could offer help with these symptoms.

Basically the car's not getting any charge, and the battery light doesn't come on with the ignition OR when running, it does however come on during (and only during) cranking. When I pulled the alternator apart the brushes looked worn but they're still touching the sliprings with good pressure & I've cleaned them up too. Everything checks out internally, no broken coils etc.

I'm just wondering with the absence of charge light except for cranking if it's likely to be the wiring or if the reg/rec/diode pack tend to fail. Hopefully I'll know more once I've tested the pin outputs but just searching for an easy option haha...

SuperSpartan · 03-04-2010, 08:08 PM

odd, yea im not a wizz at all this but what solved my problem is the good old fashioned process of elimination!
replaced alternator, battery, starter, ect. now it has come down to the wiring.
ill post again once i have it solved out.

MarkLinRacing · 03-04-2010, 08:56 PM

I have it wired directly from the alternator to the battery.

Really easy to do. I can take pics if you like but I'm heading to work now and won't be home until really late.

Meter shows over 14.0V consistently so now my alternator charges my battery just fine.

SuperSpartan · 03-05-2010, 03:41 PM

Alright sounds good, id appreciate it if you did post these pics up, ill keep checking thanks!

MarkLinRacing · 03-05-2010, 03:51 PM

Quote:

Originally Posted by SuperSpartan

Alright sounds good, id appreciate it if you did post these pics up, ill keep checking thanks!

Hold tight, I'll go take some now.

01-14-2010, 08:07 AM	#1
SuperSpartan 3" Exhaust Join Date: Mar 2008 Location: Tucson Arizona Posts: 97	Wires To Alternator Help Whats the three wires that join into a plug into the back of the alternator on a 1990 Turbo? It heads from the back of the alternator to the bottom of the fuse box. The wires are cut due to years of being angeled, i need to replace it. Could be the issue why my batt doesn't charge. Im wondering where or how i can replace this. __________________ 1990 Toyota Supra Turbo!! www.cardomain.com/ride/3067504 Last edited by SuperSpartan; 01-14-2010 at 08:13 AM.

01-14-2010, 05:19 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	http://www.cygnusx1.net/Supra/Librar...x?S=Main&P=042 __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

01-15-2010, 01:09 AM	#3
SuperSpartan 3" Exhaust Join Date: Mar 2008 Location: Tucson Arizona Posts: 97	Thanks seems like i have to get down in wiring it my way though correct? Since i do not think they sell any cables just for that. __________________ 1990 Toyota Supra Turbo!! www.cardomain.com/ride/3067504

01-15-2010, 01:12 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	I don't understand what you are asking there. Call a Toyota dealer in your area, they may be able to order a pigtail you can just splice on, otherwise replacement plugs and terminals are available and you can do it yourself. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

01-15-2010, 01:37 AM	#5
SuperSpartan 3" Exhaust Join Date: Mar 2008 Location: Tucson Arizona Posts: 97	haha its alright ill do just that. Thanks for the wiring reference however very helpful since my bay looks like a pit of snakes tangled with vines. __________________ 1990 Toyota Supra Turbo!! www.cardomain.com/ride/3067504

03-04-2010, 06:37 PM	#6
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	Thought I'd post my charging issues in here so as not to start another thread, I've got to check the wiring out with my multimeter yet but was wondering if anyone could offer help with these symptoms. Basically the car's not getting any charge, and the battery light doesn't come on with the ignition OR when running, it does however come on during (and only during) cranking. When I pulled the alternator apart the brushes looked worn but they're still touching the sliprings with good pressure & I've cleaned them up too. Everything checks out internally, no broken coils etc. I'm just wondering with the absence of charge light except for cranking if it's likely to be the wiring or if the reg/rec/diode pack tend to fail. Hopefully I'll know more once I've tested the pin outputs but just searching for an easy option haha... __________________ '89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!!

03-04-2010, 08:08 PM	#7
SuperSpartan 3" Exhaust Join Date: Mar 2008 Location: Tucson Arizona Posts: 97	odd, yea im not a wizz at all this but what solved my problem is the good old fashioned process of elimination! replaced alternator, battery, starter, ect. now it has come down to the wiring. ill post again once i have it solved out. __________________ 1990 Toyota Supra Turbo!! www.cardomain.com/ride/3067504

03-04-2010, 08:56 PM	#8
MarkLinRacing Stock Join Date: Nov 2009 Location: Canada Posts: 29	I have it wired directly from the alternator to the battery. Really easy to do. I can take pics if you like but I'm heading to work now and won't be home until really late. Meter shows over 14.0V consistently so now my alternator charges my battery just fine. __________________

03-05-2010, 03:41 PM	#9
SuperSpartan 3" Exhaust Join Date: Mar 2008 Location: Tucson Arizona Posts: 97	Alright sounds good, id appreciate it if you did post these pics up, ill keep checking thanks! __________________ 1990 Toyota Supra Turbo!! www.cardomain.com/ride/3067504

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