I've had two problems with my 1986 Cutlass 442.
No high speed blower:
Fix:The red wire going to the High speed relay had a bad connection. Follow the red wire into a push connector along the passenger side valve cover. I removed the wire connectors and soldered and heatshrinked the connection to fix. Look for this before replacing any parts. With the ignition on and the blower on check voltage at the highspeed relay big red wire with the relay plugged in.
My battery dummy light stayed Illuminated while the car is running:
Fix:I replaced a diode trio inside the alternator to fix the problem. I also had a slight drain in amperage from this.
I used a digital VOM (volts ohms meter) to find these problems. A meter is a must have when troubleshooting these old electrical bugs.
No high speed blower:
Fix:The red wire going to the High speed relay had a bad connection. Follow the red wire into a push connector along the passenger side valve cover. I removed the wire connectors and soldered and heatshrinked the connection to fix. Look for this before replacing any parts. With the ignition on and the blower on check voltage at the highspeed relay big red wire with the relay plugged in.
My battery dummy light stayed Illuminated while the car is running:
Fix:I replaced a diode trio inside the alternator to fix the problem. I also had a slight drain in amperage from this.
I used a digital VOM (volts ohms meter) to find these problems. A meter is a must have when troubleshooting these old electrical bugs.
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