Hi all,

This is my first post here, although I've found a lot of helpful advice just searching the forums. I hope I can get some now. I have no blower function. I've replaced the switch, the relay, the resistor and the blower motor itself. All the fuses are fine as well, and yet nothing happens when I turn the heat on. The winter's been mild so far, but I need to get this taken care of before it turns. Any advice would be appreciated.
Thanks in advance.

 

Welcome to the site..

The grounding for the blower control is commanded through the function/control selector. Not just the fan switch. Could be a drop out there, but sometimes only on one function selection is affected. May come back to the the ground though....

First,, do you hear/feel the blower relay 'click' when fan and functions are selected? If no,,

Start by checking at the blower relay connector/plug,, you should have 12V 'hot at all times' on one leg there, and one 'switched' 12v distribution at the connector as well. If good there, you should see 12v at the blower motor pink/white wire. You could,, at that point,, ground the orange /black wire at the blower motor and it should come full speed. If so,, ground control is lost. The blower resistors job is to vary ground resistance (depending on fan switch postion) to achieve motor speed/s via the O/BK circuit..

Do you have any voltage at the resistor connector?

If so,, next ground the Red/Orange wire coming off of the fan control switch, if the blower motor comes on LOW, your loosing gound through the function selector, or, at the grounding connection at the chassis.. Ground is located at the top center of left hand fender apron ..

 

on 96 the blower motor resistor controls the fan if the main part of it goes it wont work had to do this on mine 6 months ago when it was warm out mine failed and i replaced blower motor and resistor