View Single Post
Old 03-06-2013, 08:58 AM   #3
gchemist
BAD BOW-Silverado XST
 
gchemist's Avatar
 
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
Re: 77 A/C Vacuum Diagram

What do you need to know? Wiring is connected in series. Power to low pressure switch -->high pressure switch ---> good ground. Power to low pressure switch comes from dash position switch. If low or high pressure switch activate, power to compressor is turned off.
__________________
Gerardo a.k.a. Mad Chemist
Silverado XST videos
gchemist is offline   Reply With Quote