2003 Dakota, blower motor will die and come back on seemingly at random. I changed the resistor, as this had failed before. This time the connector had gotten hot and I had to cut it off and replace it. At this point I had all fan speeds, but it would still turn on and off at random. I unplugged the blower and put a meter on the leads and drove around, and it showed 13V the whole time so I bought and installed a new blower motor. Still turns on and off at random.
I suspect a bad ground, but where does it actually ground to? The harness goes up into the dash and switch I suppose. I'll pull it apart if I have to but if anyone knows specifically where to look I'd appreciate it. All the other electrical works normally. Thanks.

 

There's an electronic shop manual in the stickies above. Ground point should be behind the passenger kick panel. Manual will confirm.

 

No grounding happening behind the kick panel. The wiring goes above and behind the HVAC housing and the air bag. Could it be the AC Climate Control Module is going bad? Only $250.

 

That stud next to the yellow connector is what the grounding points look like. Coulda swore one was connected there.

 

While trying to find the wiring on the drivers side, I discovered I can turn the fan on and off by moving this bundle on the steering column. I’ll explore more tomorrow. Perhaps spliced in when the remote start was added?

 

Oh brother, looks like the same guy that wired the stereo on my Colorado was in there. My stereo wound up frying because the tape came off the twist splices and shorted several wires together. I put correct splices in when I put a new stereo in.

 

I think you've found your problem. The blower motor is supplied by a separate circuit on the ignition switch. It should be a dark green 12 gauge wire, to the blower. The feed to the ignition switch for the blower is a 10 red with light blue stripe 10 gauge.

Seriously, fix those wires properly before you lose your truck in a fire.

 

Maybe this box or the ignition switch?

 

Second rule of troubleshooting is, fix known problems before investigating suspected problems. By inducing the problem by moving the wiring harness you've verified the wiring harness as being a problem. Correct those crap splices and your problem should go away. If it doesn't, you've at least eliminated a now known problem with your truck.

 

Does anyone have a part number for the two pin connector that plugs into the blower motor? Mine melted and a new motor is intermittently running due to poor contact. I've stopped using the truck until I locate a new connector, don't need a fire in the cab. Thanks in advance for any help.

Chris