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1st & 2nd Generation (19831986 & 1987-1991) Toyota Camry Discussion for years: 1983-1986 & 1987-1991. Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

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Old 06-21-2010, 05:40 PM   #1 (permalink)
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ever wonder what happens when you cross battery cables?

Yes that is a thing that happened to me not too long ago. My battery was dead (girlfriend left the dome light on). It wasn't starting so I flagged down this guy that happened to be at my neighborhood to help me out. Without me knowing he crossed the jump cables on his side and when I went to start the car nothing happened. I tried a new battery but only the lights work and the door light on the dash comes on but that's it. I hate diagnosing electric problems and I was hoping someone here would chime in with an idea of what's wrong.
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Old 06-22-2010, 09:10 AM   #2 (permalink)
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Yikes!!

First I would check all the fuses. If you're lucky maybe a main fuse blew protecting the regulator/alternator. Hopefully the ECU is not toast.
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Old 06-22-2010, 11:22 AM   #3 (permalink)
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Check the alternator fuse. It should be something like a 100 AMP fuse. You may have to unbolt the fuse box to change it. They are sometimes bolted in from the side with an 8MM hex head bolt that can only be removed by first lifting up the fuse box.

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Old 06-22-2010, 02:01 PM   #4 (permalink)
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I'm really hoping the ECU isn't toast. If it is I'll likely sell the car for parts. What about the fuses that are right on the battery terminal. I forget what they were for but should I check those?
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Old 06-22-2010, 06:16 PM   #5 (permalink)
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Quote:
Originally Posted by viktord1 View Post
I'm really hoping the ECU isn't toast. If it is I'll likely sell the car for parts. What about the fuses that are right on the battery terminal. I forget what they were for but should I check those?
You need to check them all. The alternator fuse is most likely blown, but there could be others. Get a cheap digital volt/ohmeter and test them all, one by one. This shouldn't take more than a few minutes.

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Old 06-23-2010, 08:49 PM   #6 (permalink)
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2nd Generation blown ECU

Hey man if your ECU is blow you can get one cheap off of ebay. I did a few years ago because mine died a tragic death. Do check all of your fuses and circuit breakers first and see what you can come up with. Good luck.
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Old 06-24-2010, 08:44 AM   #7 (permalink)
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It's unlikely any fuses popped, they don't care which direction current flows.
You stand a good chance of having ruined the diodes of the voltage regulator. I'll keep my fingers crossed for you on the rest.
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Old 06-27-2010, 07:57 PM   #8 (permalink)
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It's unlikely any fuses popped, they don't care which direction current flows.
You stand a good chance of having ruined the diodes of the voltage regulator. I'll keep my fingers crossed for you on the rest.
That's what I figured as well. Immediately after it happened my car smelled like burnt electronics. Really sad to see this car go. I've had it since 2001 and it has been the most reliable transportation I ever had but oh well....time for a e36 bimmer
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Old 06-27-2010, 08:51 PM   #9 (permalink)
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That's what I figured as well. Immediately after it happened my car smelled like burnt electronics. Really sad to see this car go. I've had it since 2001 and it has been the most reliable transportation I ever had but oh well....time for a e36 bimmer
A toasted alternator(prob fixable with a new voltage reg.) is a pretty lame excuse to abandon the car but if there is a nice 3er in the future for you then by all means
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Old 06-27-2010, 10:47 PM   #10 (permalink)
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A toasted alternator(prob fixable with a new voltage reg.) is a pretty lame excuse to abandon the car but if there is a nice 3er in the future for you then by all means
It's not just that it doesn't run now. It needs new rotors, pads, shocks, control arm, and a bunch of misc things dont work such as power windows, door locks, door light on dash stays on (very annoying), etc etc. Too much time to spend working on a car that isn't very fun to drive IMO
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