Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! ZJ (93-98), WJ (99-04), WK (05+)
All ZJ/WJ/WK specific tech questions asked here!

Power to the PCM 97 GR Cherokee

Thread Tools
 
Search this Thread
 
Old Nov 18, 2012 | 04:23 PM
  #1  
hesermon's Avatar
Thread Starter
Newbie
 
Joined: Nov 2012
Posts: 13
Likes: 0
Model: Cherokee
Default Power to the PCM 97 GR Cherokee

What provides power to the PCM? I have used a test probe to check for power on every single pin on all three connectors at the PCM and none show voltage with the key off or key on. Shouldn't there be power to the PCM even with the key off? I have no power at the coil, therefor no start. Problem was intermittent, now it has not started in several days. Without some constant current, how does it store codes, etc.?
Thanks in advance for any help.
Hugh
Reply
Old Nov 18, 2012 | 05:59 PM
  #2  
Bustedback's Avatar
CF Veteran
 
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Default

Have you checked the fuses?
Reply
Old Nov 18, 2012 | 06:03 PM
  #3  
hesermon's Avatar
Thread Starter
Newbie
 
Joined: Nov 2012
Posts: 13
Likes: 0
Model: Cherokee
Default

Originally Posted by Bustedback
Have you checked the fuses?
Yea, I should have mentioned that. All fuses are good and I've switched the relays around to eliminate then as well.
Since the problem was intermittent for so long, I can't imagine that it's a fuse.
I know that the PCM must have constant power or it would not store codes. If I knew what pin it comes in on that would be a great start in finding why it's not there.
Thanks!
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Blackcherokee290
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
28
Jan 8, 2025 11:36 PM
KyMoonshine
Introductions
8
Apr 30, 2019 06:52 PM
CCKen
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
Aug 20, 2015 08:07 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -5. The time now is 11:43 PM.