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This is a connector behind the passenger right foot kick panel below the blower motor.
The green wire goes all the way to the front of the car where the AC drier is mounted next to the condenser and is a two wire connector. The other wire to this connector runs back to a relay on the passenger shock tower.
2 questions:
1. What is this blue connector for?
2. Is the green wire likely supplying power to the drier, and if so what's its function?
I found out that this is the constant voltage source for my AC low pressure switch that's mounted on the drier/accumulator (2nd pic).
I have an aftermarket AC in my 1LE and it has a 1 wire AC compressor that's controlled by the low pressure switch, and an evaporator temperature switch. It's also spliced in to the cooling fans relay in the driver's side fuse box.
I put AC gauges on and ambient I'm equalized at 50/50psi on the low and high side. Jumping the AC clutch the low side goes to 1-3psi and high goes to about 100psi. So I'm low on freon. I'm going to add some by jumping the clutch again and see if I can charge the system to pressures consistent with ambient temps. If it works, then I'll replace the wiring to the low pressure switch, the switch itself and see if that corrects the clutch not engaging from HVAC controls. I could always jump the connector at the low pressure switch and verify my wiring and relays.
Found a blown fuse to the compressor. The power wire to the compressor had corrosion and high resistance (probably what blew the fuse), and the evaporator temperature preset clutch cyclic switch is stuck in the open position.
The bad thing, is this coil probe with a bulb on the end of it, goes into the top of the air box, and is fastened or brazed somewhere on or near the evaporator coil. I'm pretty sure to gain access to it, the glove box door, and under panel need to be removed, the heater core panel and heater core...then I should be able to see the evaporator coil and temperature bulb in there.
All the sensor does is if the evaporator coil gets below approx 34° F, it opens the circuit removing voltage from the AC compressor clutch. I thought the low pressure switch should prevent evaporator icing, is this evaporator temp cycling switch really needed?
Last edited by 1994-LT1-Eric; Jul 2, 2021 at 08:01 AM.
