Electrical problem

2002 CHEVROLET TRAILBLAZER
20,000 MILES • 4.2L • 6 CYL • 2WD • AUTOMATIC
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
When I turn on high beams it stalls and when low beams are on and I turn my left turn signal on the right light blinks with it, doesn’t happen on the other side. All relays are good as well as fuses.
Dec 2, 2019 at 11:12 AM
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AL514
  • ✓ASE Certified Mechanic
  • 5,587 POSTS
  • ASE Certified Mechanic
Hello, it sounds like the body control module may have gone bad, or you have a wiring issue. Is the check engine light on?
Dec 3, 2019 at 5:29 AM
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CHILIE WILLIE
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  • 4 POSTS
No check engine light and no codes.
Dec 3, 2019 at 8:45 AM
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AL514
  • ✓ASE Certified Mechanic
  • 5,587 POSTS
  • ASE Certified Mechanic
Somethings going on with the body control module. It controls all the blinker circuits and is in communication with the engine computer. Unless there's a bunch of wires that have melted together. All the power and ground wires to the body control module need to be checked.
Dec 3, 2019 at 9:04 AM
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
Okay, I will start checking and let you know. might take a minute. I do have a BCM from my other Trailblazer can I swap them out?
Dec 3, 2019 at 9:19 AM
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CHILIE WILLIE
  • MEMBER
  • 4 POSTS
Can I use the BCM from another Trailblazer without having to reprogram it?
Dec 3, 2019 at 11:37 AM
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AL514
  • ✓ASE Certified Mechanic
  • 5,587 POSTS
  • ASE Certified Mechanic
You can try unless it's a wiring issue.
Dec 3, 2019 at 12:19 PM
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