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Andy4639 · 04-08-2016, 03:50 PM

There is a plunger switch behind the duct work right before the floor vent. If it's not pushed in it want come on. This is what makes the compressor kick on per the system. So if you jumped the LP switch out and it ran then it's working. Don't run it long with that switch jumped.
This is the factory manual drawing of the wiring.

04-08-2016, 03:50 PM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: AC compressor wont kick on.. There is a plunger switch behind the duct work right before the floor vent. If it's not pushed in it want come on. This is what makes the compressor kick on per the system. So if you jumped the LP switch out and it ran then it's working. Don't run it long with that switch jumped. This is the factory manual drawing of the wiring. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.