little black box rewiring?

[hassy21]

My black box that goes to the low pressure line on the ac went out and seen a thread that nooblet bypassed the box? Just wondering if anybody had any diagram or info to bypass?

[Tintacker]

Not sure how you would bypass it and still get the A/C to cycle properly. I'd be interested to know.

You can still buy the box though, Mopar P/N 56005783, You can get it online for about $75

[hassy21]

We'll for right now I just put an auxiliary switch to engage and disengage the AC compessor clutch. Just bypassed the two other wires and ran the brown wire to a two way switch and grounded it to the brake release lever to get a good ground. It Is a bit of a hassle but worth it in 100 degree California weather. Especially with a 1 year old in the middle.

[PToombs]

What's the black box do? I don't have AC on my truck and I'm curious.

[Tintacker]

FSM calls it the "freeze control" or "electronic temperature cycling stitch". Keeps the evaporator coil from freezing up. (works better than my '04 did!)

Hassy21, If your in a bind man I think I have a working spare around here somewhere, let me know. We can't have you overheating the young one!!

John

[oldestof11]

I thought the purpose of cycling the AC is to keep from freezing the exchanger??? I know when you put propane in to use as a coolant the pressure is too low to trip the said switch thus freezing the exchanger into a ice cube.

[Mark Nixon]

I probably have a good used one around.

Mark.

[Tintacker]

I thought the purpose of cycling the AC is to keep from freezing the exchanger??? I know when you put propane in to use as a coolant the pressure is too low to trip the said switch thus freezing the exchanger into a ice cube.

You are correct. What you call the "exchanger", the shop manual calls the "evaporator".