Repeat blower resistor failure

[homefree]

Originally Posted by OKBob

Can anyone help me locate and provide directions on replacing the Thermal Cutoff Fuse on my 2005 Grand Caravan with auto temp control?

http://www.youtube.com/watch?v=wsazw...eature=related

On my 2004 the blower didn't work on any of the fan speeds until I replaced this.

[RIP]

Originally Posted by OKBob

Can anyone help me locate and provide directions on replacing the Thermal Cutoff Fuse on my 2005 Grand Caravan with auto temp control?

Auto temp control systems don't have the thermal fuse. They don't even have the resistor block the fuse is soldered to. What you have is a comparatively pricey ($60) solid state blower control module. It's located in the same area as the resistor block. Just disconnect the plugs and remove two screws. Install in reverse.

[OKBob]

I am not getting any power to the module or the fan.
I know I poped something when I tried jumping across the module connector to see if the fan would operate. Any idea what fuse
or other componet I may have affected? I don't have a wiring diagram to refrer to.
Thanks for any lead you can provide

[RIP]

Originally Posted by OKBob

I am not getting any power to the module or the fan.
I know I poped something when I tried jumping across the module connector to see if the fan would operate. Any idea what fuse
or other componet I may have affected? I don't have a wiring diagram to refrer to.
Thanks for any lead you can provide

Power comes from the front blower relay then through a 10 amp fuse, both on the IPM (fuse box), then out to the blower control module. The Front Control Module (FCM) controls both the front and rear blower relays. If the rear blower is working then the FCM is doing it's job.

Check that fuse and swap the front and rear blower relays.

[mik2005]

Something else to keep in mind...I've had to replace my 2005 Dodge Grand caravan blower resistor again at about the same time 1 yr ago. Exactly one very cold (-20 Celcius) day after having parked my van inside a heated shop for about 30 mins. Just enough time to have some of the ice and snow melt and enter the front heater fan & motor housing. I'm assuming that there has been just enough water that turns to ice overnight to cause the fan blades to bound up subsequently causing the motor to overheat and blow the resistor.

To test for a faulty thermal fuse, I first removed the blower resistor, re-connected all wiring, checked for power and ground then by-passed the thermal fuse and the fan worked on all settings.

This time I am only replacing the Thermal fuse if I can find one in the local area.

[HeadlessHorseman1]

If you're burning up Resistor Blocks over and over, save yourselves headaches and money by replacing the Resistor Block, Blower Motor and Relay all at the same time...

http://www.automotiveforums.com/vbul...d.php?t=340871

You'll get YEARS of trouble-free operation by doing so... I had a '96 GC LE for 14 years and over 300,000 miles. Been there, done that.

[mtech345]

2005 grand caravan/3.8/ATC with digital display control head. First replacement blower motor module failed. Cause of failed first replacement is restricted cabin filter(lack of air flow), blower motor drawing 18 amp on high, during amp test. Replace blower motor, cabin filter and blower motor module.

[Bartleyc]

mtech345 - you say your blower motor was drawing 18amps prior to replacement? Mine is drawing 17-19+ amps and is stuck on high. What did the new motor draw?

I bought a used motor, so I want to make sure 17-19 amps is blowing the new resistors before I return both parts for exchange.

Thanks