hey guys my cruise control on my 2000 manual tj vrx is not working the cruise light on the dash comes on but thats it any ideas???

Have you been setting it, or just pressing the button?

Make sure you brake lights work, if both bulbs are blown cruise will not engage!

Make sure you brake lights work, if both bulbs are blown cruise will not engage!

Any idea how/why is that? There's the obvious link between the brake pedal switch and cruise control (to disengage cruise at the slightest touch of the brake pedal) but what's the connection to the brake lights? Why would cruise control be dependent on at least one brake light working? Is that an ADR thing?

(On a side note, my previous car was a 1990 Subaru Liberty that had a warning light come on in the instrument panel if one of the brake light bulbs had blown. Pretty neat I thought.)

Ignore my post above - I just realised why at least one brake light bulb needs to be good: it provides a ground connection (zero V) to the wire coming from the brake light switch which is also shared by the cruise control unit. For safety, the cruise control requires this wire to be at 0V and disengages if it goes to 12V (such as when brake pedal is pressed) or goes high impedance (such as when both brake light bulbs are blown).

A very good point Andrei1984, thanks for that!

Check the brake switch and the clutch switch I've had this happen once before in my old magna

Have you been setting it, or just pressing the button?

i have been setting it not just pushing the button i also have a 2001 automatic tj vrx i have had no problems with cruise in the 6 years i have owned it but the 2000 manual tj vrx i have just got so fixing all the little problems with it....



Check the brake switch and the clutch switch I've had this happen once before in my old magna

ok how do you check them???

Try swapping over the vac pumps between the 2 cars, also check the vac diaphram on the VRX as well as the val line. Most of the time if the car is un molested the vac pump will be the issue if you do not have brake light globe issues

thanks mal will give that a try....

also, if your foot is resting on the clutch at all, the cruise won't engage. figured this out when a mate drove my car home from sydney one day lol

also, if your foot is resting on the clutch at all, the cruise won't engage. figured this out when a mate drove my car home from sydney one day lol

you are spot on TimmyB that was the problem stopped resting my foot on the clutch pedal and what do ya know it works lol

you are spot on TimmyB that was the problem stopped resting my foot on the clutch pedal and what do ya know it works lol

glad i could help mate :)

glad i could help mate :)

just goes to show you never stop learning thanks again mate:woot: