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Old 11-14-2017, 01:28 PM   #1406
WillHucks29
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Join Date: May 2015
Location: Conway, South Carolina
Posts: 3
Re: 85 GMC Sierra "Scarlett"

Quote:
Originally Posted by Mtblack412 View Post
Any luck on that harness I indicated in the photo. I know it’s not the headlight harness because mine still work. The harness in question is below the firewall block.
If memory serves me right that is a vacuum line for the Cruise control. It has its own separate switch on the brake pedal housing. It goes from the switch, through the firewall, and to the servo mounted on top of the intake. It should be right beside the carb on the passenger side. It is what disengages the cruise when you hit the brakes I think.

Last edited by WillHucks29; 11-14-2017 at 01:42 PM.
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