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Battery hooked up backwards and turned over to start multiple times

Tiny
JOSH MASON
  • MEMBER
  • 1995 TOYOTA CAMRY
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
Few fuses did blow and were replaced. It turns over fine and new alternator and fuel pump were and battery were put in after switching terminals to correct position. Don't know what else to check, coils and plugs don't seem to be getting fire to concerned it nay be ECM or igniter though these are least common to happen normally. Any suggestions?
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Friday, March 20th, 2020 AT 7:21 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi,

I need you to check a few fuses for me. When checking, not only confirm the fuse is good, but make sure power is available to it.

Picture 1 is the fuse box under the left side of the instrument panel. Check the highlighted fuses. Picture 2 is from a schematic. Check the fuses indicated. The EFI fuse powers the ECU, so check that as well.

Let me know note that it is important to confirm power is to these fuses. If there isn't, then we have a problem before the fuse box.

Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

_________________

Chances are it isn't a major issue. I suspect there is a fuse issue. Make sure the main heavy amperage fuses are in good condition. Those fuses power the smaller fuse boxes.

Let me know what you find.

Joe
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Thursday, February 25th, 2021 AT 4:08 PM
Tiny
JOSH MASON
  • MEMBER
  • 3 POSTS
We've checked all the main fuses under the hood in the fuse box located behind the battery also we've checked all the fuses on the inside located underneath the instrument panel. Originally there were a few that were blown but we have replaced them and checked all of them again and there were none that were blown then but the car will still not start. I just ordered a new ECM assuming that it did burn up that module since we don't know what else it could be. I also ordered an igniter because I was told that could be a problem also.
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Thursday, February 25th, 2021 AT 4:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
When you replaced the fuses, did you confirm there was power to them? Something may have caused a problem before the power even gets to them.

Let me know.

Joe
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Thursday, February 25th, 2021 AT 4:08 PM
Tiny
JOSH MASON
  • MEMBER
  • 3 POSTS
Replaced ECU and igniter then car started right up so problem fixed. Thanks for all the help and information everyone sent!
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Thursday, February 25th, 2021 AT 4:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Hi, Josh. I'm glad to hear you got it taken care of. Thanks for letting me know. I'm certain this thread will help someone in the future.

Take care of yourself. In other words, stay healthy in these crazy times.

Joe
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Thursday, February 25th, 2021 AT 4:08 PM

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