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

1998 GMC SIERRA

200,000 MILES

WES74

MEMBER
1 POST
FOLLOW

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?

Dec 22, 2011 at 5:03 PM

JACOBANDNICKOLAS

CAR REPAIR CONTRIBUTOR
110,190 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?

Dec 22, 2011 at 6:07 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.