PCM ground tab
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Freshman User
Joined: Aug 2016
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PCM ground tab
I have read up on this subject and it seems my truck does not have this little tab in place.
Can you please clarify for me the purpose of this tab and what signs/symptoms I would see if the tab wasn't present/isnt replaced?
This is specific to my 2000 DRW 7.3 ZF6
Please advise.
Can you please clarify for me the purpose of this tab and what signs/symptoms I would see if the tab wasn't present/isnt replaced?
This is specific to my 2000 DRW 7.3 ZF6
Please advise.
It's a Van Gogh
Joined: Feb 2010
Posts: 7,813
Likes: 1,335
From: Elk Grove, CA
In the pic below it is visible as the thin gold bit under the lower PCM bolt. The bottom arrow in the top pic points to it. It serves as a ground, but also to push the PCM against the firewall to maintain seal.
I found mine rolling around in the footwell a couple months after I installed the F5 chip. D'oh! I put it back in but evidently it is not critical. If the PCM does not ground I suppose you might see a hard/no start, maybe a P1316 code, etc.
I found mine rolling around in the footwell a couple months after I installed the F5 chip. D'oh! I put it back in but evidently it is not critical. If the PCM does not ground I suppose you might see a hard/no start, maybe a P1316 code, etc.
Lead Driver
Joined: Dec 2006
Posts: 7,093
Likes: 147
From: San Diego, CA
I may be wrong but I thought it was a PCM case ground to prevent electrostatic buildup (circuit boards don't like that too much). Much like wearing a grounding strap on your wrist when working on electronic components.
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