10-14-2015, 07:10 PM
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#15
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: 71 Cheyenne AC Help
Quote:
Originally Posted by Davidf
The heavy gauge orange wire connects to the terminal labeled "CIG".
Also, I recently discovered (service bulletin) that the brown (field) wire at the voltage regulator should have a blocking diode installed to prevent the anti-dieseling relaying from being damage. GM says this should be used in addition to the updated anti-dieseling relay 6273301 that has a blocking diode built it. Apparently, early trucks/relays did not have either diode and the result was power feedback that damage the relay and caused constant 12v to the a/c compressor clutch thereby resulting in a drained battery.
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That is interesting info. Can you be nice enough to share where this info came from. Where did you find a service bulletin for these old trucks?
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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.
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