Question about 1999 Dodge Ram 2500 4WD
I had the same problem and i found a blown fusable link in the wiring harness 12" behind the battery. I found this by checking the inbound power to the fuse box.
Posted on Feb 18, 2009
Test and or replace the resistor block. It will be mounted in the duct work for the heating system. I think it should be on the passenger side firewall of the engine compartment it should have 4 wires in a plug. remove the plug and check for corrosion. It may also be under the dash. It will have a wire coming to it from the blower as the power goes from the relay to the blower then to the resistor and the switch in the dash decides which path the power will take thru the resistor block. check with a test light for power on the largest wire. If you have power there you can ground out any of the other wires and the fan should come on. if it does you will need to check and replace the switch in the dash. mike
Posted on Jan 04, 2009
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Posted on Jan 02, 2017
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