2001 dodge caravan heater/ac blower motor first worked only in high setting now only works intermittently , usually when van is cold. Replaced relay under hood, 40 amp fuse is good, and motor resistor behind glove box. should i replace blower motor or is this an electrical short or something? Are there any more fuses to check under dash and if so where?
The motor is located just under the glove box on the passenger side. I remove the glove box then the panel below the glove box. I also go ahead and pull back the carpet and the padding under the motor. It is held in place by 3-4 bolts that take a 7-8 millimeter socket. I use a swivel extension for the back bolts. The motor with the fan blade attached is a tight fit, just keep wiggling and pulling it should come out. Try to remove the old moter without cracking the fan blade, because sometimes the replacement motor doesn't come with a blade
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If the problem is a lack of air flow from the vents, and you suspect the blower motor is not running at times, you would need to test the blower relay and blower motor for power and ground when it is not working.
try tapping the bottom of the blower motor with the blower motor speed selector turned to high and the key on. If the blower motor starts working replace it.
Another thing you can try is unplugging the blower motor and supplying your own power and ground wires to the blower motor. It doesn't matter what pin on the blower motor you supply power or ground. It will work either way. If it doesn't than replace the blower motor. If it does you might have a bad control head.
You could also have a bad blower motor relay or blower motor fuse located in the underhood fuse block. There should be power at the dark blue wire at the blower motor with the key on and the fan speed set to any position.
do this calibration reset, it will usually rest he lights and the ac will work again, if it doesn't reset you have a part failure and the dealer you need to hook a Chrysler scan tool to diagnose the problem.
CALIBRATION/DIAGNOSTICS TEST ENTRY TO INITIATE TESTS: Set Blower motor ON HIGH Set Mode position to Panel Set Temperature to Cold (Both slide pots if equipped) Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light) RESULTS: All LED's will turn on for 5 Seconds Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cooldown test is running if A/C and RECIRC are alternately flashing. Acceptable results is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit. After all tests have passed, Calibration Diagnostics and Cooldown can be run separately
If you are mechanically inclined and have patience for first time projects.The blower motor should be up under the dash behind the glove box,some are enclosed with the heat and ac and require dash removal,I know this from Dakota trucks but I am not 100% for the newer vans.It might also be under the hood on the passenger side firewall.
In any case it usually involves removing cosmetic panels and unless you know where the screws and clips are it will take time to find them or you could do what one of my friends did and use a crow bar but his van doesn't look so good anymore RedGreen would be proud of the use of duct tape.
Yes, in high it bypasses the resistor and uses a high blower relay. But I think on 1998 Astro the High relay and the resistor are built together. It should be mounted in the blower box real close to the blower motor.