I have an 2002 Dakota , my blower is on passenger side of truck, under dash by feet there was 4 small screws to take out blower just came out on mine. Something to check see if there is a electronic card in behind the blower, mine had that, change the card if it has one that controls your blower speeds, when mine went bad only had off and high for a few months, then none, changed blower no go, then found out about this card, dealer cost about $75 canadian, auto wreckers $25 canadian ... hope this helps.
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Roger it sounds like the blower motor is not comming on. There is a resistor network located in the engine compartment on the passenger side mounted to the firewall, that controlls the blower motor. The connections may have corroted or the unit itself is bad. That was the first thing I had to relpace when I got my used 92 Dakota. There is also a 30 amp fuse in the fuse box under the dash board . If that is blown I would suspect the blower motor is seized up or just pulling too much power.
replace your blower motor resistor its about 20 bucks and i could only find one at the dealer i had the same problem 4 months ago if that doesnt work your next option is the blower motor but im 90% sure its the resistor 04 dodges have alot of problems with that resistor burning out it is located on the passenger side beside the blower motor two bolts holding it in it will be a rectangle shaped piece of plastic just un clip it and clip the new 1 in
If all the fuses are good(the blower fuse is usually a 30 amp) the next culprit could be a blower motor resistor. The resistor is normally under the dash with fat wires on it and screwed into the blower housing. You could have a bad motor also.
Yes you need to unplug the heater and use the heater plug to apply 12v.you can get your 12v from the accessory or cig lighter plug.Do you have an old appliance that you plug into the socket/if so cut appliance off and check wich is positive wire.Make sure to check the blower motor as well,no good blowing it up if its still ok.