supra is dead

86stock · 11-17-2010, 03:55 AM

i drove my supra all day today, it performed fine, ran smooth, started right up. then i was driving and my e-brake and battery light started flickering a little.
i pulled into a gas station and shut the car down, and now it wont start.
my headlights flip up, and turn on, but besides that, i have no power to anything. no windows, radio, ect. car will not turn over, the battery light comes on and thats it.

i tired to jump start it, but the same thing happened. please help

91ma70 · 11-17-2010, 05:08 AM

my bet is on the alternator failing

86stock · 11-17-2010, 01:30 PM

if the alternator was bad, wouldnt it start when i jumped it still?

cre · 11-17-2010, 04:41 PM

If you have NO power to any of the circuits but you have power to the headlights it isn't the alternator.... especially since the alternator only provides power while the engine is moving.

No, with a bad alternator you would only be able to jump it and run it until the battery was dead.

Check the 100A Alt Fusible link in the engine bay glove box. IIRC, the headlights are one of the only circuits which bypass it.

t12tninja · 11-17-2010, 04:54 PM

Quote:

Originally Posted by 91ma70

my bet is on the alternator failing

yup correct thats what i would think

cre · 11-17-2010, 05:39 PM

Does the dome light come on? What's the voltage measured at the battery?

Zcustom · 11-17-2010, 06:01 PM

check the wire that runs from the positive battery terminal to the fuse box under the hood. If your battery isn't secured (or even if it is) this wire can become brittle and break.

This happened to me a year or so ago. It also explains random electrical systems working/not working.

86stock · 11-18-2010, 12:00 AM

i figured it out.. one of the previous owners did some custom wiring, and bypassed the fuse for the alternator with a wire. over the years it corroded and finally broke. i got a fuse, and it started right up.

thanks for all your advice. this was my first time on this site, and ill be back for sure

cre · 11-18-2010, 05:52 AM

That's the fusible link. They were originally a specific length of wire at a specific gauge and out of specific materials so it would burn up if more than a certain load was placed on it. As you've noticed they do corrode significantly over time; They were replaced with self contained fuse looking versions, they're generally not called a fuse though. Toyota started using them in the MKIII toward the end of the '88 or '89 model year.

11-17-2010, 03:55 AM	#1
86stock Stock Join Date: Nov 2010 Location: ohio Posts: 3	supra is dead i drove my supra all day today, it performed fine, ran smooth, started right up. then i was driving and my e-brake and battery light started flickering a little. i pulled into a gas station and shut the car down, and now it wont start. my headlights flip up, and turn on, but besides that, i have no power to anything. no windows, radio, ect. car will not turn over, the battery light comes on and thats it. i tired to jump start it, but the same thing happened. please help __________________ 86.5 mk3 supra 7mge 5 speed, all stock. a work in progress.

11-17-2010, 01:30 PM	#3
86stock Stock Join Date: Nov 2010 Location: ohio Posts: 3	if the alternator was bad, wouldnt it start when i jumped it still? __________________ 86.5 mk3 supra 7mge 5 speed, all stock. a work in progress.

11-17-2010, 04:41 PM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	If you have NO power to any of the circuits but you have power to the headlights it isn't the alternator.... especially since the alternator only provides power while the engine is moving. No, with a bad alternator you would only be able to jump it and run it until the battery was dead. Check the 100A Alt Fusible link in the engine bay glove box. IIRC, the headlights are one of the only circuits which bypass it. __________________ 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 --->

11-17-2010, 05:39 PM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Does the dome light come on? What's the voltage measured at the battery? __________________ 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 --->

11-18-2010, 12:00 AM	#8
86stock Stock Join Date: Nov 2010 Location: ohio Posts: 3	i figured it out.. one of the previous owners did some custom wiring, and bypassed the fuse for the alternator with a wire. over the years it corroded and finally broke. i got a fuse, and it started right up. thanks for all your advice. this was my first time on this site, and ill be back for sure __________________ 86.5 mk3 supra 7mge 5 speed, all stock. a work in progress.

11-17-2010, 05:08 AM	#2
91ma70 3" Exhaust Join Date: Feb 2010 Location: Irvine/Lancaster CA Posts: 61	my bet is on the alternator failing

11-17-2010, 06:01 PM	#7
Zcustom Stock Join Date: Aug 2010 Location: Charlotte, NC Posts: 3	check the wire that runs from the positive battery terminal to the fuse box under the hood. If your battery isn't secured (or even if it is) this wire can become brittle and break. This happened to me a year or so ago. It also explains random electrical systems working/not working.

11-18-2010, 05:52 AM	#9
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	That's the fusible link. They were originally a specific length of wire at a specific gauge and out of specific materials so it would burn up if more than a certain load was placed on it. As you've noticed they do corrode significantly over time; They were replaced with self contained fuse looking versions, they're generally not called a fuse though. Toyota started using them in the MKIII toward the end of the '88 or '89 model year. __________________ 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 --->

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