Will not start after trying to jump another car

JRKERCHOFF

MEMBER
2005 CHEVROLET EQUINOX
4.3L
6 CYL
2WD
AUTOMATIC
172,000 MILES

Tried jumping another vehicle, cables were crossed. Big spark now car will not crank over.
Had battery tested-okay.
Starter tested-bad and replaced.
Checked and tested all relays - good.
Checked all fuses-good.
Changed ignition module.
All dash lights come on when key is turned to start, everything goes out when turn to start the car.
Also, fuel gauge does not move.
Headlights dim a bit but not much when key is turned to start.

Checked for 12 volts at S terminal of starter-nothing.
Ran 12 volts from battery directly to S terminal of starter- tries to crank.
Ohmed out cable from fuse box to S terminal of starter-cable good.

Everything I see says to replace/test neutral safety switch or ignition module.
Tried putting car in neutral, same thing - no crank.
Looking for schematic for starting system or any guidance.
Thanks!

6 Replies

DANNY L

MECHANIC
5,648 POSTS

Hello, I am Danny.

I am attaching two charging system diagrams you were asking for. I think having those cables reversed definitely burnt some wire! Did you check the starter relay? I would also look for maybe a melted ground wire somewhere. Hopefully you did not melt/burn the PCM! Hope this helps and feel free to ask anymore questions if needed. Thanks for using 2CarPros.
Danny-

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Saturday, July 21st, 2018 AT 9:58 AM

CJ MEDEVAC

MECHANIC
11,004 POSTS

I am betting on the fusible link! (Picture below)

Test light.

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

Or

Voltmeter.

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

Would quickly rule it in or out.

Keep us posted with results!

The Medic

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Saturday, July 21st, 2018 AT 10:37 AM

JRKERCHOFF

MEMBER
3 POSTS

Thanks Danny L & CJ MEDEVAC!

I will check the fusible link again. Just to be clear, the generator is the alternator, correct?
I did check this once and had 12 volts going to the alternator but I will double check.
One thing that I cannot find is the correct orientation of the relays in the fuse panel under the hood.
There have been some other "helpers" and just want to verify they are in correctly.
Greatly appreciate all the help!

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Saturday, July 21st, 2018 AT 11:31 AM

DANNY L

MECHANIC
5,648 POSTS

Hello again.

Yes, definitely check the fusible link! Here is a picture of the fuse box. Hope this helps and thanks for using 2CarPros.
Danny-

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Saturday, July 21st, 2018 AT 1:14 PM

JRKERCHOFF

MEMBER
3 POSTS

Thanks guys for everything and the prints.
Thanks for the print of the fuse panel. Is there a print or diagram of where it shows what the orientation of the relays are? The relays can be put in with the writing readable standing in front if the vehicle or 180 degrees out. Just trying to verify which way is correct.
Been a little wet out so as soon the weather clears I will continue.
Again, appreciate all the help and suggestions!