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PCM ground wire question

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Old 03-14-2017, 09:19 AM   #1
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Default PCM ground wire question

I need to change and extend my pcm ground wire. Before I take the pcm out does anyone know how it is attached? Is it just screwed in the bottom?

Reason is we need to extend it to the back of the car. Please respond if you know.

Thanks!
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Old 03-14-2017, 10:49 AM   #2
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And if it does not swap out that easy would I be safe wiring it to a distribution block and then running a 4 gauge wire from that to the rear of the car?
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Old 03-14-2017, 11:15 AM   #3
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As long as they are bonded good, grounds can pretty well be extended wherever you want. You can never have too many of them.
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Old 03-14-2017, 11:36 AM   #4
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Okay I have my ground from the block to the trunk (1/0) covered I think. Just trying to find the best way to route it.

You think a #4 gauge from a a distribution block with the factory pcm ground to the trunk is okay?

And if so do any local autopart stores like oreilly's, autozone etc.. carry distribution blocks.

Thanks!
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Old 03-15-2017, 08:46 AM   #5
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Just a quick update. I ran a new ground from my engine block to negative side of the battery using 1/0.

The second cable I added was a #4 and I have that on a distribution block with a factory wire that was on the battery I hope is the pcm. Can anyone verify there is a factory wire from the pcm to the battery?
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Old 03-15-2017, 09:07 AM   #6
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Can you post up a picture of what you have so far? I am not sure by your explanation.
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Old 03-15-2017, 09:15 AM   #7
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I'll try to get a pic when I get home tonight.

With the battery in the stock location, what wires go to the negative side of the battery? Sorry guess that would make it more clear what I need to know.
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Old 03-15-2017, 11:13 AM   #8
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One to the side of the block just above the starter and one to a small bolt just up on the fender.
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Old 03-15-2017, 11:33 AM   #9
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Thanks Cody! So it's basically just 2 ground wires that go to the negative side of the battery. I thought one of them would be from the pcm. Okay that helps.

Thanks!
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Old 03-16-2017, 09:50 PM   #10
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NP. Good luck
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