The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Electrical

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 06-27-2018, 03:22 PM   #1
JackB
Active Member
 
Join Date: May 2015
Location: Menifee, Ca
Posts: 149
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?
Attached Images
 
JackB is offline   Reply With Quote
Old 06-27-2018, 09:13 PM   #2
dmjlambert
Senior Member
 
dmjlambert's Avatar
 
Join Date: Apr 2016
Location: Cypress, TX
Posts: 931
Re: AC/Heater Fan Switch Problem

The switch should be pushed all the way up for off, and the bottom position is high.
dmjlambert is offline   Reply With Quote
Old 06-27-2018, 09:40 PM   #3
JackB
Active Member
 
Join Date: May 2015
Location: Menifee, Ca
Posts: 149
Re: AC/Heater Fan Switch Problem

Quote:
Originally Posted by dmjlambert View Post
The switch should be pushed all the way up for off, and the bottom position is high.
lol...Well color me stupid, When I put my glasses on it says HI on the bottom not OFF like I thought. Thanks for pointing that out before I started tearing things apart..
JackB is offline   Reply With Quote
Old 06-27-2018, 10:03 PM   #4
dmjlambert
Senior Member
 
dmjlambert's Avatar
 
Join Date: Apr 2016
Location: Cypress, TX
Posts: 931
Re: AC/Heater Fan Switch Problem

dmjlambert is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:05 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com