When I turn cruise control on it doesn't engage but it displays the "cruise" light under the odometer. Anyone have any thoughts about this?

 

You mean turn on and press set, right?

The wiring to the switches is good, you've confirmed it. They are multiplexed so if anything was bad it wouldn't turn on. The set switch could be bad however.

I'd start with the brake switch. Pins 4 and 5 should show continuity in order to engage the cruise control. Disconnect the connector, then on the switch it's the pins that match with the the yellow with red tracer AND dark blue with red tracer wires.

Also, make sure all your vacuum lines are tight and that you get a nice strong vacuum at the cruise control servo itself. Make sure the servo cable moves freely too. It is also possible for the servo itself to fail.

 

When I turn it on it says cruise but nothing happens when I press set. I do need to check the vacuum lines.

 

You should read my thread talking about my cruise control issue...It just might help.

Link - CC Troubleshooting

 

I'm pretty sure I found the solution. When I reinstalled the throttle body I didn't get the cable on all the way and it slipped off.

 

Thanks for the update. Glad you got it.