Heater not getting power

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jdickson

Junior Member
Joined
Dec 21, 2024
Posts
1
Reaction score
0
Location
utah
First Name
jonathan
Truck Year
1982
Truck Model
C20
Engine Size
454
Hi everyone I have an issue with my heater and have not been able to figure it out. My blower wasn’t getting power so I swapped the relay, resistor, and switch. I also ran power straight to the blower and it works.

I tested voltage and am not getting power to the purple wire at the relay or any wires in the switch.

I tore all the lumes off and traced the wire from the fuse box and found that the wire is cut however I cannot find another wire for it to connect to. The wires from the relay/resistor to the switch are all in tact. I looked at the wiring diagram that shows it should be tying into a yellow wire but there is also no yellow wire at the resistor or under the dash I could tie it to.

Any ideas on where this wire is supposed to tie into? I have a 82 C20 with an AC option.
 

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