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06-27-2018, 03:22 PM | #1 |
Registered User
Join Date: May 2015
Location: Prescott AZ
Posts: 199
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AC/Heater Fan Switch Problem
Just finishing up the wiring on my 71 Blazer restore and I've run across a problem that has me baffled. Basically everything works properly except the fan switch works backwards High speed on bottom where it should be off then one click up medium speed then low and finally of at the top where it should be on high it turns off. I have two AC harnesses and the wiring to the plug is the same on both so that doesnt seem to be the problem, Switch is new is there any chance its internally backwards somehow? Switch only mounts one way otherwise I'd just flip it over. I dont know if it matters but I do have the anti dieseling relay and it seems to work as well, fan and compressor stay on for a few seconds when the key is turned off. I guess one solution would be to change to wiring in the connector but that doesnt seem like the right solution. Ideas?
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06-27-2018, 09:13 PM | #2 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,619
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Re: AC/Heater Fan Switch Problem
The switch should be pushed all the way up for off, and the bottom position is high.
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06-27-2018, 09:40 PM | #3 |
Registered User
Join Date: May 2015
Location: Prescott AZ
Posts: 199
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Re: AC/Heater Fan Switch Problem
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06-27-2018, 10:03 PM | #4 |
Senior Member
Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,619
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Re: AC/Heater Fan Switch Problem
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12-14-2018, 12:42 AM | #5 |
Registered User
Join Date: Sep 2018
Location: estherville, IA
Posts: 61
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Re: AC/Heater Fan Switch Problem
What is the part number for that switch? All I can find are the flat style connection ones.
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12-14-2018, 10:13 AM | #6 | |
Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
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Re: AC/Heater Fan Switch Problem
Quote:
I had started reading your post and was thinking huh! That's one of those oh yea moments.
__________________
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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