I need some schooling on the wiring circuit on my 60. It's an 1981 glasses-fused truck, but looking at the POS Haynes book I have the wiring diagram seem to match a 1982.
The heater fan stopped working and while tracking down the issue I discovered that behind the fuse block, the 10a fuse for the AC has a bumper line drawing power from the 10a turn signal fuse post. This bandaid fix is where my short was and the heater fan is running again, but at best this was a PO half ass fix.
If I'm reading the Haynes wiring schematic correctly, the fan's power comes from the alternator to a circuit breaker to a relay then on to the fan. The negative side of the fan travels to the dash switch and/or a resistor for speed control. The control side of the relay is triggered by a second line from the switch.
For what I can tell, the AC fuse that I had to jump, is in line AFTER the relay and heads off to the AC switch. Seem to suggest that if the fan switch isn't on then the AC fuse wont get power to the AC switch.
FINE!
But that doesn't seem to be what's happening. Jumping power to the dead side of the AC fuse actives the circuit and the fan runs.
Questions,
1) where should the pre-fused side of the AC fuse get power from?
2) How should the fan circuit work?
Any light would be appreciated.
Thanks,
Carl
The heater fan stopped working and while tracking down the issue I discovered that behind the fuse block, the 10a fuse for the AC has a bumper line drawing power from the 10a turn signal fuse post. This bandaid fix is where my short was and the heater fan is running again, but at best this was a PO half ass fix.
If I'm reading the Haynes wiring schematic correctly, the fan's power comes from the alternator to a circuit breaker to a relay then on to the fan. The negative side of the fan travels to the dash switch and/or a resistor for speed control. The control side of the relay is triggered by a second line from the switch.
For what I can tell, the AC fuse that I had to jump, is in line AFTER the relay and heads off to the AC switch. Seem to suggest that if the fan switch isn't on then the AC fuse wont get power to the AC switch.
FINE!
But that doesn't seem to be what's happening. Jumping power to the dead side of the AC fuse actives the circuit and the fan runs.
Questions,
1) where should the pre-fused side of the AC fuse get power from?
2) How should the fan circuit work?
Any light would be appreciated.
Thanks,
Carl