89 toyota supra non turbo headlight troubles help please

agui_mkIII · 02-22-2013, 09:54 PM

I just got my first car, 1989 Toyota supra, and the headlightss constently stay on so i have to unhook my battery everytime I park it. Any help?

cre · 02-25-2013, 02:07 AM

More often than not it's an issue with the switch.

Here's the body/chassis electrical section of the Toyota Service manual for the '91 Supra (most of it is the same from '89 through '93). http://www.cygnusx1.net/Supra/Librar....aspx?S=BE&P=1

agui_mkIII · 02-26-2013, 06:00 AM

Awesome thanks i bought the relay fuse for the headlight and it wasnt that so this helps I appreciate it

suorajd · 03-13-2013, 01:47 AM

Quote:

Originally Posted by agui_mkIII

I just got my first car, 1989 Toyota supra, and the headlightss constently stay on so i have to unhook my battery everytime I park it. Any help?

I have a 87 turbo with the same problem and i have been through the wiring twice and checked all the relays . Changed the light switch the rtr control box bypassed the theft system only thing i can figure out is the headlight relays is getting 12volts before it get to the switch i can't find it but instead of undoing ur batt .just take ur headlight relay out and that will cut ur headlights off every thing else will world as normal just remember to put it back in just for ur headlights urparking lights and brake lights will function fine without the headlight relay

agui_mkIII · 03-14-2013, 06:25 AM

Yea thanks I started to do that once I got thw new relay but question my efi relay gets really hot n like is shorting or something because if i push it don't or sligjtly move it, it buzzes or clicks, something of that sort n since the headlight relay is near maybe my wiring is messed up somewhere? I mean this car has many loose plugs n such. But was just wondering if those two may br hand in hand

cre · 03-15-2013, 04:20 AM

The EFI normally gets hot on many cars including the MKIII... Most likely nothing's wrong there.

agui_mkIII · 03-15-2013, 06:07 PM

well should it buzz and click when being touched? i recently ran into a problem with the car starting and dieng right after so i replaced the spark plugs thinking itd fix the problem but that didnt fix it. but i dont know if the TPS is connected right or if the EFI relay would play a roll in it not running properly.

MA70-3.0GT · 03-15-2013, 08:44 PM

Have you checked for codes? you'll know if the TPS is out of calibration then.

Clicking/buzzing relays can be either bad relay or loose/dirty connections, maybe you could pull it out & check that it's terminals are clean and the ones it pushes into are tight first...

Do the headlights still stay on with the switch on the steering column unplugged? And if so, what about with the fuse taken out?

02-22-2013, 09:54 PM	#1
agui_mkIII Stock Join Date: Feb 2013 Location: Barstow,CA Posts: 4	89 toyota supra non turbo headlight troubles help please I just got my first car, 1989 Toyota supra, and the headlightss constently stay on so i have to unhook my battery everytime I park it. Any help?

02-25-2013, 02:07 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	More often than not it's an issue with the switch. Here's the body/chassis electrical section of the Toyota Service manual for the '91 Supra (most of it is the same from '89 through '93). http://www.cygnusx1.net/Supra/Librar....aspx?S=BE&P=1 __________________ 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 --->

03-15-2013, 04:20 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The EFI normally gets hot on many cars including the MKIII... Most likely nothing's wrong there. __________________ 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 --->

03-15-2013, 08:44 PM	#8
MA70-3.0GT 12psi boost Join Date: Oct 2009 Location: Crewe, England Posts: 356	Have you checked for codes? you'll know if the TPS is out of calibration then. Clicking/buzzing relays can be either bad relay or loose/dirty connections, maybe you could pull it out & check that it's terminals are clean and the ones it pushes into are tight first... Do the headlights still stay on with the switch on the steering column unplugged? And if so, what about with the fuse taken out? __________________ '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!!!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
1987 Toyota Supra 1JZ-GTE Twin Turbo Targa Top AZ	AlexSchuSupra	Buy/Sell Cars	1	01-31-2011 07:00 AM
Have you ever experienced someone	SupraHead	MKIII Supra	8	10-30-2010 04:06 AM
1989 toyota supra non turbo low oil pressure	bayrat	MKIII Supra	6	09-19-2010 05:33 PM
1997 toyota supra turbo	chunner1	MKIV Supra	0	05-07-2010 05:27 AM
93 toyota Supra Twin Turbo Engin wont shut off	fastandfurious93	MKIV Supra	5	09-08-2008 06:50 PM

02-26-2013, 06:00 AM	#3
agui_mkIII Stock Join Date: Feb 2013 Location: Barstow,CA Posts: 4	Awesome thanks i bought the relay fuse for the headlight and it wasnt that so this helps I appreciate it

03-14-2013, 06:25 AM	#5
agui_mkIII Stock Join Date: Feb 2013 Location: Barstow,CA Posts: 4	Yea thanks I started to do that once I got thw new relay but question my efi relay gets really hot n like is shorting or something because if i push it don't or sligjtly move it, it buzzes or clicks, something of that sort n since the headlight relay is near maybe my wiring is messed up somewhere? I mean this car has many loose plugs n such. But was just wondering if those two may br hand in hand

03-15-2013, 06:07 PM	#7
agui_mkIII Stock Join Date: Feb 2013 Location: Barstow,CA Posts: 4	well should it buzz and click when being touched? i recently ran into a problem with the car starting and dieng right after so i replaced the spark plugs thinking itd fix the problem but that didnt fix it. but i dont know if the TPS is connected right or if the EFI relay would play a roll in it not running properly.