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What would cause my ABS light to be on and my blower and 4 wheel drive not work?

Tiny
WES74
  • MEMBER
  • 1998 GMC SIERRA
  • 200,000 MILES
For the past couple months when my ABS light is on my heat/ac blower won't work and my 4 wheel drive won't work. The light does not stay on constantly. I know it's all related because when the light is off everything works perfect. I have spent several hundred dollars on parts, trying to find out what the problem is. New hubs, sensor, tie rod ends, ball joints, brakes, ect. Any ideas on what could be wrong? I read in another post about a faulty ignition switch, could that cause my problems? Or any other suggestions?
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Thursday, December 22nd, 2011 AT 5:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Okay, it sounds like you replaced several non electrical parts for an electrical problem. Check to see if there is power to the 4wd actuator on the transfer case. Make sure the wiring to it is clean, tight, and making good contact.

As far as the heater, have you checked to see if there is power to the blower motor itself? Have you checked main fuses under the hood to make sure noting is loose?
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Thursday, December 22nd, 2011 AT 6:07 PM

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