Please help me, my 2006 Hummer 3 will not start then will
Member
Joined: Dec 2009
Posts: 39
From: NE of Tampa, FL
No, your problem was the switch. Glad you found it and fixed it! My issue was a bit more complicated.
Not a topic of discussion I bring up in public but now that you mention it I will be extra careful.
I have over 30 experience years doing troubleshooting / repair to electrical equipment. Granted it has not been working on cars but the same principles apply. A BCM is nothing but a specialized PLC with inputs and outputs. The erratic behavior described by the OP could be voltage fluctuations caused by the battery, the battery terminals, water intrusion, a harness grounding out, a loose plug, a bad voltage regulator, or a dozen other things. All you can do is eliminate one problems at a time until you find the root cause.
Junior Member
Joined: Dec 2017
Posts: 2
Dwaller67
I am having the same problem, may I ask your help? I want to bypass the passlock system and want your help in doing so. I have my car in a third world country, no insurance to worry about. I truly appreciate your help.
My 07 H3 had many of the same problems. I bypassed the passlock system completely, replaced the battery terminals, and ran new wiring to power on the body control module. It might have been overkill but so far I have had zero more issues. It has only been a couple of weeks since the latest repairs but so far so good.
I hope you get your issues sorted out.
I hope you get your issues sorted out.
Senior Member
Joined: Jul 2012
Posts: 8,980
From: C-Town
Do they sell electronic contact cleaner and dielectric grease in your "third world country"?
How Passlock works ? Ricks Free Auto Repair Advice Ricks Free Auto Repair Advice | Automotive Repair Tips and How-To
How Passlock works ? Ricks Free Auto Repair Advice Ricks Free Auto Repair Advice | Automotive Repair Tips and How-To
Junior Member
Joined: Dec 2017
Posts: 2
Please help me, my 2006 Hummer 3 will not start then will
My 07 H3 had many of the same problems. I bypassed the passlock system completely, replaced the battery terminals, and ran new wiring to power on the body control module. It might have been overkill but so far I have had zero more issues. It has only been a couple of weeks since the latest repairs but so far so good.
I hope you get your issues sorted out.
I hope you get your issues sorted out.
I am having the same problem, may I ask your help? I want to bypass the passlock system and want your help in doing so. I have my car in a third world country, no insurance to worry about. I truly appreciate your help.
Junior Member
Joined: Sep 2019
Posts: 4
Help
My 07 H3 had many of the same problems. I bypassed the passlock system completely, replaced the battery terminals, and ran new wiring to power on the body control module. It might have been overkill but so far I have had zero more issues. It has only been a couple of weeks since the latest repairs but so far so good.
I hope you get your issues sorted out.
I hope you get your issues sorted out.
Junior Member
Joined: Sep 2019
Posts: 1
Try getting a new computer... about 150 dollars and it will have to be programmed or learned. I was starting to have weird problems and that fixed it.
https://www.yourmechanic.com/ They make housecalls.
https://www.yourmechanic.com/ They make housecalls.
Member
Joined: Apr 2019
Posts: 32
How I fixed the passlock system on my 2007 H3
I recently took the passlock switch out (located to the left of the steering column) and examined it, everything looked good and clean to my surprise. I sprayed the male/female interface part with wd40 just to see if it was maybe getting stuck and put it back together. I did that about 3 months ago and I haven't had an issue since, so I'm considering it fixed. I used to have that problem at least a couple times per month so it can't be a coincidence.
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