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westofb · 09-29-2009, 11:45 PM

Don't for get to check the blower motor resistor mounted inside the truck in heater plenum, access it through the glove box is easiest. This reduces voltage to blower motor to vary it's speed...the part inside the plenum looks similar to light bulb filaments on larger scale, these are apt to break causing no power to get to blower motor...they reduce voltage by producing heat...the heat/ cold cycles lead to its demise. It is attached to the heater plenum by 2 small screws or bolts and has a wiring pig tail with like 3 wires in it I think.

09-29-2009, 11:45 PM	#10
westofb I really hate wet sanding! Join Date: Dec 2008 Location: Brookfield, MO Posts: 601	Re: Help with heater needed Don't for get to check the blower motor resistor mounted inside the truck in heater plenum, access it through the glove box is easiest. This reduces voltage to blower motor to vary it's speed...the part inside the plenum looks similar to light bulb filaments on larger scale, these are apt to break causing no power to get to blower motor...they reduce voltage by producing heat...the heat/ cold cycles lead to its demise. It is attached to the heater plenum by 2 small screws or bolts and has a wiring pig tail with like 3 wires in it I think.