79kcrew
Junior Member
- Joined
- Jul 25, 2024
- Posts
- 5
- Reaction score
- 4
- Location
- USA
- First Name
- Sam
- Truck Year
- 1979
- Truck Model
- k2500
- Engine Size
- 5.3L
I’ve been chasing the issue of only having the low on my 79 crew for a while. I’ve put in 3 different relays (a used one and two new ones, I did jump the purple to the red and got high speed but it was constant even with the key off), a resistor, a blower motor, and a fan speed switch (the lever was broken off). It’s an A/C truck but the A/C wiring for the evaporator control switch is no longer there. Would that have anything to do with it? I’ve also cleaned the ground for the relay and blower motor.
