Compression Ignition Addict
Join Date: Aug 2008
Location: Madison, WI
Thanked 145 Times in 141 Posts
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The switch is on the clutch pushrod. Four-wire connector. The two wires closer to you are for the cruise control. Contacts normally closed, but when you first start to push the pedal, the contacts open to interrupt the cruise.
The two wires closer to the firewall are the starter interlock. Contacts normally open, and when you push the pedal ALL the way down, they close, allowing you to start the truck.
So if you're having trouble starting it, along with the clutch issue, that points the finger at that crappo bushing. Pedal doesn't fully push the pushrod, doesn't close the switch, no starty.
Here's a shot of the cheapo drill stop collar fix. 'Course you can't see the brass bushing inside the eye. The switch is the black cylindrical thing in the bottom of the pic. I noticed in our other truck, I didn't even bother with the brass bushing; I just kept the stoopid plastic one, but cut off the four "ears" on it.
One thing to keep in mind is that when that plastic bushing gets weak enough, the "knob" on the arm will pop right out of the eye, and you get no clutch action at all. Clutch remains fully engaged, pedal spring makes it snap to the floor, switch doesn't close.