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Ground short in AC/heating system

Tiny
DIVERLEDFORD1968
  • MEMBER
  • 2003 GMC ENVOY
  • 4.2L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 198,000 MILES
Ground wire is hot and the red wire is not hot.
Thursday, October 23rd, 2014 AT 2:56 PM

4 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
The power supply has to be shorted to ground. Have you tried tracing wires to see if there is anything damaged or broken? Have you checked plugs to make sure nothing has melted down and shorted?
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Thursday, October 23rd, 2014 AT 4:54 PM
Tiny
DIVERLEDFORD1968
  • MEMBER
  • 3 POSTS
I took the control unit out, checked the plug and it looks good. Not sure how to proceed from there.
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Thursday, October 23rd, 2014 AT 8:49 PM
Tiny
DIVERLEDFORD1968
  • MEMBER
  • 3 POSTS
Can I cut the red and black wires going into the control unit and run new wires with a fuse back to the battery?
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Thursday, October 23rd, 2014 AT 8:56 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
Not recommended. Have you tried tracing the power supply wire to see if it is damaged?
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Friday, October 24th, 2014 AT 5:04 AM

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