Blower motor
Blower motor
- Thread starter richmo
- Start date
Lol, that's crazy, you are getting voltage all the time which means you have a short to an always hot wire or your new switch is bad also
IOPort51
NOT the voice of reason Jeep-CJ.com
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- Location
- Garland Texas
- Vehicle(s)
- 1977 cj-5
4.2 W/MC2100 carb, 4.0 head W/3 angle valves,SS Header,TFI ignition with MSB-6 offroad module,CS144 140 amp RPS alternator with remote regulator T-150,d-20,Dana 44 with OX lock and disk brakes. D-30 with Spartin locker,
skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
2006 Toyota Tacoma
Do you have a volt/ohm meter? 
Torxhead
Always Off-Roading Jeeper
If the fan doesn't run you could have a bad resistor. But, since it does, check a see if you get low,medium, and high speeds from the blower motor. Then check which speed is still operating in the off position. That should help you break down which circut is the problem. The heater resistor could be connected incorrectly.
It seems like the switch position doesn't make a difference. I will check again. I put in a painless wiring harness and replaced the switch. The previous owner had put in a toggle to turn it off. It doesn't run unless the key is on
I took voltage readings at motor and found 11.29 +/-.02to.04 at all switch positions. I also removed the heater resistor and got the same reading (all with motor unhooked). There is no difference in output with the motor plugged in.
Mreggmnstr
Jeeper
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- Location
- Columbia Gorge, Pacific Northwest
- Vehicle(s)
- 1979 CJ5, 258 L6, T-150, Dana 20, Dana 30, AMC 20, 3.54 gears
Dumb question but... Are you sure it is TAN wire #780 from the engine wiring harness to the power tab on motor from inside engine bay?
You could also pull your fuse for heat/ac and just re-assure yourself it's something wired in that series instead of being wired from a different source
You could also pull your fuse for heat/ac and just re-assure yourself it's something wired in that series instead of being wired from a different source
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Mreggmnstr
Jeeper
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- Location
- Columbia Gorge, Pacific Northwest
- Vehicle(s)
- 1979 CJ5, 258 L6, T-150, Dana 20, Dana 30, AMC 20, 3.54 gears
conundrum... what if you took the plug for the switch, made a small jumper and go from power to each individual terminal and see if that changes speeds.
Mreggmnstr
Jeeper
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- Location
- Columbia Gorge, Pacific Northwest
- Vehicle(s)
- 1979 CJ5, 258 L6, T-150, Dana 20, Dana 30, AMC 20, 3.54 gears
I have had from NEW Parts: bad master cylinders, switches, and resistors. So I wouldn't be surprised. Let us know.