My turn for a no start. Starting circuit issue... - JeepForum.com

 
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post #1 of 11 Old 08-03-2010, 07:43 PM Thread Starter
EvilM0nkey
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My turn for a no start. Starting circuit issue...

First time my Jeep has ever let me down
I went to pick up my new to me car trailer and 1970 C10 and brought the TJ along for winching support. When we got ready to leave (The truck got on the trailer under it's own power) the TJ wouldn't start. Had to bump start it. Fast forward to today. I'm able to crank and start the Jeep by shorting the starter. Lots of sparks are coming out of the starter so I'm thinking it's time for a new one anyway... But I'm not getting 12V to the starter with the switch turned.

Known good (working):
Battery (tests over 1,000CCA)
Starter relay
Starter (going bad but still works)
Starter fuse

Suspect:
Ignition switch harness

If anybody has a wire diagram of the ignition switch that would be great.


-Ross

Last edited by EvilM0nkey; 08-04-2010 at 07:17 PM.
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post #2 of 11 Old 08-04-2010, 04:55 AM Thread Starter
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Bump...

-Ross
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post #3 of 11 Old 08-04-2010, 11:58 AM
tim87114
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if you go to autozone.com and signup your self for free.
Once you have an account Click on Repair INFO Tab in the middle of the upper part of the screen
Once the repair you will see "vehicle repair guide" in the middle of the screen. Scroll down and you will see wiring diagram at the bottom of the list, click on it.

The first thing to appear will be the airbag system. Just ignor it and look at the left side of the screen list. Scroll down about 1/2 way down the list you will see "Starting System" broken down by year of jeep. Click on the 2002 and you will see the jpg's pop up in the center of the screen in order. HINT. Open the image and you can save it to your computer and print it. If you try to right click and print you will only get a thumbnail.
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post #4 of 11 Old 08-04-2010, 12:01 PM
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I also wanted to point something out.
On my 05 I had an issue where I came out and all it did was one click then nothing. So here is what I did.
Turned on headlights. Looked good
Using DVM checked battery with nothing on > 12.5 vdc
Checked battery during crank> 10.5vdc This is an indication of too large of a voltage drop in the battery and indicates a dead cell.
If you can jump start the vehicle without issue then have the battery checked for a dead cell.
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post #5 of 11 Old 08-04-2010, 07:17 PM Thread Starter
EvilM0nkey
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Thanks for the advice I'll check that out.
I also know the battery is good since I can short the starter and crank it no issue. It also tested over 1,000CCA when I tested it a month ago.

-Ross
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post #6 of 11 Old 08-04-2010, 07:38 PM Thread Starter
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No joy. There isn't an ignition switch diagram in there. But there is a ton of cool stuff in there!

-Ross
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post #7 of 11 Old 08-05-2010, 07:25 AM Thread Starter
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The diagrams I was able to find tell me that the starter signal comes from the ECU. So I can either be looking at a bad ignition switch or ECU

-Ross
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post #8 of 11 Old 08-05-2010, 05:20 PM Thread Starter
EvilM0nkey
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I figured it out. It not electrical at all. The part of the mechanical side of the switch that turns the electrical side broke off inside of the switch so it couldn't turn the switch. Like if you were turning the electrical part of the switch with a screwdriver, it's the screwdriver that broke...

-Ross
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post #9 of 11 Old 08-05-2010, 08:19 PM Thread Starter
EvilM0nkey
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And it looks like that part of the switch is part of the steering column!!!!

-Ross
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post #10 of 11 Old 08-05-2010, 10:00 PM
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D A V E Y S J E E P S . C O M - Parts Specials
The 75.00 part about 1/2 way down.
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post #11 of 11 Old 08-06-2010, 11:24 AM Thread Starter
EvilM0nkey
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Yep I found that. Gotta wait 5 more days till they open again

-Ross
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