QuestionI have a 1995 Chevy Silverado Ext.Cab 305 engine. The blower motor was acting up, it would work for awhile and stop. After it stopped altogether, I checked the fuse, it was fine.When I checked the wires going to the blower motor, they were both hot. Knowing that one should be the ground, I replaced the fan switch, Carefully changed the resistor, and the blower motor itself. No dice, and both wires are still hot. My old motor works fine when hook it to a battery.
I have tried using both wires and grounding it while mounted but it still won't work. When I turn on the fan switch, I hear the the air conditioning clutch engage, and both lights come on the dash. My question is, which direction do I need to go from here? I sure miss my A/C. Thanks.
AnswerI will asume by 'hot' you mean both wire have power. Remove the plug goind to the blower motor resistor and probe each wire until you find a ground (always the black wire) using that ground check the other wires, each wire should have a voltage depending on the selected fan switch setting. Plug your resistor back in and using a volt meter, measure the voltage at the fan connector. Your voltage should vary depending on what fan switch setting is selected.
If you have no power at the resistor during the first test I describe, inspect the switch
If the first test is ok, but there is no voltage coming out of the resitor, change the resistor.
That wasn't terribly clear, but I hope it helps
