Electrical Gremlin

[Bennett]

I posted a while back about my turn signals and AC not working. I got the turn signal issue straightened out, but the AC is more problematic. I have replaced all fuses and I still have the following problems: (1) AC blower not turning on. Previously worked perfectly; (2) blower fan not turning on; (3) horn not working.

Any ideas before I have to drop it off with Coupe King for a diagnosis?

Thanks in advance.

 

[Honolulu]

Do you have, can you read and comprehend an electrical diagram?

Electrical power runs in a circuit, which means it starts at the battery, runs through wires and switches, then returns to ground either at the battery or some point on the body. Run a red pencil line where the juice is supposed to go. Start somewhere on the red line, test for power using a test light or multimeter. If no power, you are "downstream" of the failure point, so move upstream until you isolate the suspect item, then remove it and verify correct function. Mentally or physically flow-charting the path of power through components and switches to ground can help you visualize the path and itemize the check points.

The problem could be a bad connection (at switches or component) or a faulty component. But when you think you've found the fault, double check your analysis. You have to keep a clear mind through the physical effort to accomplish a systematic check, which can be difficult.

If this is too much, then taking it to a pro is your answer.