junkyard speed control?
Laughing Gas
Joined: Jul 2002
Posts: 843
Likes: 1
From: USA
Not that difficult. I did it with my '77 years ago. You need the steering wheel, the computer from up under the dash and the wiring harness to it, under the hood you need to get the vacuum servo and the plastic piece off the throttle linkage at the carb. I eventually changed my '77 to a '78/'79 tilt steering column and upgraded to an '80+ steering wheel which has the resume button on it. Used the computer from the later model which plugged right in to the existing harness. Oh, take pictures of the vacuum tubing inder the hood to help in hooking yours up. My truck was a '77 F-150 Custom cab, no frills truck from the factory. It is now equiped with factory air conditioning, cruise control, tilt steering, and interval wipers. The beautify of these old trucks is the factory used a common wiring harness in them so the plugs you need are already there.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
The factory parts used 1975/77 are mostly different than the factory Speed Control parts used on 1978/79 F100/350, Bronco & Econoline.
Factory installed: The Speed Control switches are located in the horn pad. 1975/77 Speed Control horn pad and steering wheel different than 1978/79.
Dealer installed Speed Control: The switch clips onto the turn signal handle.
Note 1978/79: There is no horn relay unless the F100/350/Bronco/Econoline has factory installed Speed Control.
The horn relay attaches to the Speed Control Amplifier, located on the inside of the firewall adjacent to the fuse box.
Tuned
Joined: Sep 2012
Posts: 367
Likes: 2
From: summerfield florida
Me, Too
I use 2 simple momentary switches; one for set and one for resume.
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