Wiring being the least likely, that leaves the 4 speed switch, blower resistor, and is there also a relay???
Where are the resistor/relay?
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1995 Ford E-150 Question: No voltage to main blower motor. Motor new & OK, fuse OK, 13.4 volts at fuse.
Answer #1G. T. Service Center (4142 Answers) , Stephenville, TX - (254) 638-3236ProfessorG May 07, 2014, 19:03Master
Did you check the ground, how is it.
Replybpbny, May 07, 2014, 19:24Rookie
When I run a single hot jumper to fan hot lead it runs full speed.
ReplyProfessorG, May 07, 2014, 19:34Master
So your wiring is not hot to the blower. The resistor is a ground, the relay is in the left side of the engine compartment and goes through the orange/red wire straight to the blower motor.
Replybpbny, May 07, 2014, 20:12Rookie
So if the resistor is a ground, and I ran a hot lead to the motor and it ran, then the resistor is not the problem. I believe that I should next check the voltage in and out of the relay???
ReplyProfessorG, May 07, 2014, 20:19Master
That sounds like a plan to me. The control unit puts b+ With the key on, to one leg of the relay should be a good ground to another. The blower fuse goes to another then when the relay trips it sends b+ to the blower. Go to bed shortly.
Replybpbny, May 07, 2014, 20:23Rookie
Thanks much!!! I'll give it a whirl in the AM.
ReplyProfessorG, May 07, 2014, 20:40Master
10-4. Good luck.