heater motor fail 90 cummings
one day my blower motor stoped working on my 90 dodge cummins so i tested the blower motor, low-high switch, all the fuses under the steering column changed the resistor. and still no fan on any setting. i checked the plug for power at the blower motor in the engine bay and theirs now power goin to it.
and theirs no power goin to the resistor plug and i checked the plugs on the dash buttons for defrost and vent all that theirs no power goin to those plugs aswell, thats with the key on. the only relay i cand find on this truck is under the steering column its a [COLOR=blue !important][COLOR=blue ! important]3 [COLOR=blue ! important]prong[/COLOR][/COLOR][/COLOR] one and when i pull it out theirs power goin to the relay, i also pluged the raly back in and tested with the tester light from under neath and the horn goes off when you touch the one wire so i dont think this relay sends power so the blower motor or the dash buttons
if anyone can give me any direction with this it would be deepy apreachiated
Bad switch. Or if its like my 82 try moveing ignition back a bit if it works in on position but not after you have started it. The return spring is stuck on my ignition switch
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