Will this effect the factory cruise control function?
No. All of the functions will work as they did before while
driving. In this case, the cruise buttons are only used to control the
function of the high idle while in Park or Neutral.
I just installed this and it is not working, what now?
The most common issue is the connection of the high idle wire to the brake switch. It may help to strip the insulation on the high idle wire and a portion of the insulation on the green/white wire at the brake switch. Then the wire can be twisted together and taped up or even better, a drop of solder then covered with tape.
If you are sure you have a good clean connection, then we need to check the green/white wire for power. We should see 12 volts when in Park or Neutral and the brake pedal is released. If you do not have power on that circuit, check the 10amp BTSI fuse in the underhood fuse block.
If you find the fuse to be in good shape, use a test light or meter to ensure you have power at both sides of the fuse.
If you have no power to the fuse, then lets check the reverse lights. With the key on and engine off, put the gear selector in reverse and see if the lights are on. If not, lets take a close look at the 20amp B/U LP fuse in the underhood fuse block and replace if needed.