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Electrical problem

Tiny
CHILIE WILLIE
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 4.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 20,000 MILES
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.
Monday, December 2nd, 2019 AT 11:12 AM

6 Replies

Tiny
AL514
  • MECHANIC
  • 4,118 POSTS
Hello, it sounds like the body control module may have gone bad, or you have a wiring issue. Is the check engine light on?
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Tuesday, December 3rd, 2019 AT 5:29 AM
Tiny
CHILIE WILLIE
  • MEMBER
  • 4 POSTS
No check engine light and no codes.
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Tuesday, December 3rd, 2019 AT 8:45 AM
Tiny
AL514
  • MECHANIC
  • 4,118 POSTS
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.
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Tuesday, December 3rd, 2019 AT 9:04 AM
Tiny
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?
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Tuesday, December 3rd, 2019 AT 9:19 AM
Tiny
CHILIE WILLIE
  • MEMBER
  • 4 POSTS
Can I use the BCM from another Trailblazer without having to reprogram it?
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Tuesday, December 3rd, 2019 AT 11:37 AM
Tiny
AL514
  • MECHANIC
  • 4,118 POSTS
You can try unless it's a wiring issue.
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Tuesday, December 3rd, 2019 AT 12:19 PM

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