My blower motor on my truck has started to intermittently not work on any speed. I have looked at fuses and the resistor and both are good. I have had a similar issue on another Chrysler vehicle before and it was the relay.

I want to replace the relay but I cannot for the life of me figure out which relay it is. I have looked at both fuse compartments and the diagrams and don't see anything that sounds like the relay I am looking for.

I'm hoping someone can tell me which relay it is that I should be looking at.

Thank you

 

There isn't a relay in the circuit. Check the ground for the blower motor. Lower, center of dash.

 

Could you elaborate on what you mean by "check the ground"?

If there isn't a relay, what else could be the problem? I guess the blower motor itself?

 

It's possible the blower motor is bad.

The way the circuit works, blower gets power thru the ignition switch, and fan speed is controlled by the switch, via grounding the circuit. There are several wires coming out of the resistor block, which all lead to the switch. Which wire gets connected to ground, determines fan speed. However, if the ground wire, (which goes to the location mentioned above) isn't grounded..... then no blower motor action at all.

If the fan doesn't wanna run, but, starts running if you thump on it, that's a bad blower motor.

 

I'd start with the ignition switch. There are multiple circuits and the blower motor is on it's own circuit.
Check for power to the blower motor. It should be a 12 gauge dark green wire.

 

My motor did that later an burnt a few wires there at resistor.Be sure its ok there an no burn marks- typical problem with these because blower tends to over pull a lot .
New blower fixed mine an the bigger wire wiring harnes at resistor helped too.