With the power leads out of the way, Mike and I turned our attention to getting the lead from the cruise control switches interfaced to the TWC box. The blue connector, C108, has a red wire with a light green tracer connected to pin 10. I am pointing to pin 10 with the needle noise pliers in the above pic.
With a small sharp knife, I removed some of the black harness wrap from the wire bundle so I could get a bit of slack for this wire. With the wire cut a couple of inches from the connector, the TWC green wire is connected to the short wire still attached to pin 10 of the connector. The TWC white wire is connected to the other end of the cut wire. Crimp on butt splices where used for both connections. I carefully re-wrapped the wire bundle with electrical tape. The butt splices cause a bit of a bulge under the tape but that is of no real concern and the tape helps keep them clean and secure. Once you are done with this wire splice, your work under the dash is complete ....YEAH! (I wish they made more room under there!)
If you followed all of the steps to this point, you should have one LONG yellow wire that is not yet attached to anything and two white cables (each one with three insulated wires inside).
The white cables and the yellow wire are now routed to the engine compartment since this is where they must be connected. I prefer to use the large rubber plug that is located on the fire wall, just above the gas pedal. I can account for at least nine wires or cables that penetrate this rubber plug on my TJ.
The shorter of the two white cables will be connected to the
TJ's speed control servo. The servo is located just to the driver's side
of the master cylinder. I decided to remove the factory cable from the
servo as it would be easier to work on. I removed the two bolts that
hold the servo to the its mounting bracket and then flipped the RED locking
tab on the servo's electrical connector (it pushes from left to right in the
With the locking tab unlocked, squeeze the plug and pull it from the servo's connector. This is a 4 wire plug and you will be connecting 3 of these wires to the short white TWC cable.
More of Throttle Winch Control
4x4 Off-Road Homestead Firearms RC Models