Question about 1995 GMC Sierra C1500
Have disconnected the blower motor and hooked it up to another electrical source and it does work. Checked the resistor for continuity and it seems fine. Have replaced the switch and the relay and it is still not working. Totally stumped! Any help would be greatly appreciated.
In the beginning you should check for voltage and ground.
The 50amp fuse marked AC powers the blower motor and the motor is grounded.
The high speed relay bypasses the resistor. So you should have power coming from the fuse and thru the high relay. Then the resistor for the other speeds gets power from the heat and ac control module which also controls the blend doors.
You may need a shop manual or repair book to get the diagrams.
Posted on Jan 12, 2013
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Posted on Jan 02, 2017
I went through the same thing with my 99 suburban. It turned out to be the dash fan control switch. It is purchased seperate from the whole cluster for under twenty dollars. The instrument panel cover comes off gently by hand with the tilt steering in the down position. You have to then unplug the electrical plugs to get it out of the way. The heater ac control panel then comes out by hand far enough to unsrew the heater fan control from the back.
Posted on Jan 24, 2009
replace the A/C control head... very simple to do. Pop off the dash panel and pull the control head out... unplug the 3 harnesses and there you go.
Posted on Jun 20, 2009
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