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Unread 08-31-2013, 07:07 AM   #16
JBrady5555
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1997 ZJ 
 
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Originally Posted by JS97ZJ View Post
It's fuse 20, a 20 amp fuse
Ok I'll check it out

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Unread 08-31-2013, 07:11 AM   #17
Speedymcracer01
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Originally Posted by JBrady5555 View Post

Ok, why did you have to remove the box if you had a fuse problem? Couldn't you access all the fuses with the box in place?
Most vehicles have the lid or panel that tells them what fuse goes to what well my lid to the pdc didnt say what that fuse went to that why i had to go threw all the trouble to find what it went to
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Unread 08-31-2013, 07:11 AM   #18
JBrady5555
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That 20 amp fuse was ok.
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Unread 08-31-2013, 07:15 AM   #19
Speedymcracer01
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Is it likely that it would fail because of the battery connection issues that I was having? I imagine that it's a cheap part, is it easy to change out? It couldn't hurt to try if it's a easy job to do.
It is located on top of the bell housing on the transmission. taking the linkage apart helps you get to it but if you have the right tools you can work around it.it is a tight fit but its not that hard the cps is $40
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Unread 08-31-2013, 07:19 AM   #20
Speedymcracer01
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That 20 amp fuse was ok.
Well i would try the cps if that doesn't work look into the fuel pump because my fuel pump would come on when the pcm fuse was blown it just wouldn't prime and shut off it would stay on till i turned the key off
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Unread 08-31-2013, 07:21 AM   #21
JS97ZJ
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Check fuses #16 and #18.
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Unread 08-31-2013, 12:08 PM   #22
JBrady5555
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Originally Posted by JS97ZJ View Post
Check fuses #16 and #18.
Ok I will when it quits rainnig. I'll just check them all, just a few small ones left that haven't been checked already. They all look fine from the top but I'll pull them one by one and check.
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Unread 08-31-2013, 08:14 PM   #23
JBrady5555
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Fuses were all ok, I just don't understand what else it could be. I can try to change the crank position sensor but would that really cause the fuel pump to quit humming?
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Unread 08-31-2013, 08:58 PM   #24
ZeeJay1997
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Can you say for sure that your negative cable stayed separate from the positive battery terminal or any source of B+?

It sounds like the PCM is toast.
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Unread 09-01-2013, 07:20 AM   #25
JS97ZJ
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Originally Posted by ZeeJay1997 View Post
It sounds like the PCM is toast.
I hope not.
He will need to check to see that the 12v from f 20 is getting to the PCM and that he's got the 5v coming out of the PCM.
Disconnect all of the sensors and see if you have the 5 volts.
With your meter back probe the PCM connectors,

White PCM connector Pin 31 or
Black PCM connector Pin 17 and check for frayed or shorted wires.
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Unread 09-01-2013, 01:46 PM   #26
JBrady5555
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Originally Posted by ZeeJay1997 View Post
Can you say for sure that your negative cable stayed separate from the positive battery terminal or any source of B+?

It sounds like the PCM is toast.
Wait a sec, as I was tightening the positive wire into the terminal the wrench accidentally hit the negative post and briefly sparked. I just remembered that, could that have fried something?
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Unread 09-01-2013, 02:44 PM   #27
ZeeJay1997
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It could have blown any number of fuses or fried the PCM... or anything else.

Best place to start would be at pin 22 on the black PCM connector. That is where the PCM picks up its power.
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Unread 09-01-2013, 02:49 PM   #28
Speedymcracer01
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It could have blown any number of fuses or fried the PCM... or anything else.

Best place to start would be at pin 22 on the black PCM connector. That is where the PCM picks up its power.
He said all fuses in the pcm where good thats what i thought
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Unread 09-01-2013, 02:54 PM   #29
ZeeJay1997
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op, how did you check the fuses?
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Unread 09-01-2013, 03:21 PM   #30
JBrady5555
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op, how did you check the fuses?
visual check, I could see all of them except the tiny ones. I had to pull them to check.
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