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- Dodge Ram 2nd Gen How to Replace Repair Blower Motor Switch
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1997 Dodge Ram Van Blower Motor Problem Fix
#1
1997 Dodge Ram Van Blower Motor Problem Fix
Hi,
After searching thru this forum trying to find a solution to my air conditioner blower motor which I was not able to find, I found the problem myself.
Now I hope this helps someone.
Problem was that blower motor ran only on high speed.
All leads in this forum and others I visited pointed to the Blower Motor Resistor Block (BMRB) which I replaced and did not fix the problem.
After studying the circuit diagram for the blower motor it showed that the current came first thru the blower motor switch then to the BMRB on the lower 3 speeds. On the high speed, it totally bypassed the the BMRB by way of a Blower Motor Relay (BMR)
I noticed that the BMRB was getting current but was not going to the Blower Motor which then pointed me to the BMR which I replaced and fixed the problem.
Hope this helps.
After searching thru this forum trying to find a solution to my air conditioner blower motor which I was not able to find, I found the problem myself.
Now I hope this helps someone.
Problem was that blower motor ran only on high speed.
All leads in this forum and others I visited pointed to the Blower Motor Resistor Block (BMRB) which I replaced and did not fix the problem.
After studying the circuit diagram for the blower motor it showed that the current came first thru the blower motor switch then to the BMRB on the lower 3 speeds. On the high speed, it totally bypassed the the BMRB by way of a Blower Motor Relay (BMR)
I noticed that the BMRB was getting current but was not going to the Blower Motor which then pointed me to the BMR which I replaced and fixed the problem.
Hope this helps.
#3
#4
jillbean,
My BMR was near the Resistor block about 12" away, you can try swapping with a new and see if that is your problem. If that does not work, check your switch by unplugging the connector that goes to your resistor block and testing each terminal with a voltmeter or multimeter preferably a test light and as you switch each speed on your switch you should detect current on each of terminals, of course doing so with the ignition on to make the fan start.
Hope this helps.
My BMR was near the Resistor block about 12" away, you can try swapping with a new and see if that is your problem. If that does not work, check your switch by unplugging the connector that goes to your resistor block and testing each terminal with a voltmeter or multimeter preferably a test light and as you switch each speed on your switch you should detect current on each of terminals, of course doing so with the ignition on to make the fan start.
Hope this helps.
#5
Thanks for the response. I haven't tried a new relay yet, but, I tested the wires as you suggested. At first only the first one lit up, but, when I got the blower to work on the third setting, which it only does sporadically, then the third wire lights up. Does it sound like the relay or maybe the switch?
#7
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#9
Make a diagram of where the wires go. Disconnect the battery. Cut the wiring harness back to the point where the wires are still good. Crimp on new replacement female spade lugs, AKA "quick disconnects" and then reconnect to the proper locations. You can splice in some new wire to make up for the lost length if neccessary.
#10