Cruise Control

[rmace1]

2000 Discovery II. I just bought the truck a few weeks ago and noticed the cruise control doesn't work. there is an after market radio so the controls on the steering wheel for the radio doesn't work but I wasn't sure if that had anything to do with it.

[Savannah Buzz]

Here's schematic and text of operation from the RAVE, our favorite volume of "Brit Lit" ( English majors take note ). The RAVE shop and owner's manual set is a free download below.

BTW, you'll be wanting to check your front drive shaft to see if it has grease fittings. Many did not, when they fail, they make a chirping sound, split apart, and spear a hole in the transmission. Write up on that and lots of other things in our tech section (see the D1 part of the forum, many things apply to both trucks).

[tee51397]

Does the light on the master switch on the binnacle come on (pictogram looks like a highway bridge)? If so check the vacuum line that goes from the cruise pump to the actuator, they tend to get very brittle and disintegrate.

If the light is on and the vacuum line ok try unplugging the radio and see if that works. Believe it or not, speaking to factory radios, the wrong one can cause intermittent cruise issues. Literally no other symptoms except for the fact the cruise will randomly work and randomly cut out. If that solves the issue it's time to check the wiring of the radio. There's not an issue with putting in an aftermarket deck you just have to make sure only the "necessary" connections are made to the factory amp and no signal/communications link.