Cruise Control

[Caveman]

Hey guys,

After a quick trip to O'Reilly's via Duck Creek Rd, I discovered that once I got the highway again, my crusie control wasn't working.

It was working on the way down earlier that morning.

The switch lights up when I push it, but the buttons on the steering wheel don't seem to do anything.

Anyone have any ideas as to where the fault could be.???

I did a search, but couldn't find any solutions.

Cheers
Caveman.

[DEFENDERZOOK]

<span style="color:blue">have you tried it again since then....?

switching the car off and back on may have made a difference....


is it a vacuum type unit....?</span>

[101RRS]

What car is it? Manual or Auto (D1s and D2s use different systems)

On Disco 1s the micro switch on the clutch can come loose so the cruise control thinks you have the clutch in all the time.

Fuse is another obvious 1 - also on the vacuum type the control linkage can sometimes come off the throttle body.

Cheers

[Rovernaut]

I had the same fault on mine. And exactly the same symptoms
It is a common problem.
Check the vacuum hoses that come from the actuator in the engine bay.
Also check the hoses to the vacuum pump and underneath in the footwell.
these hoses perish and loose vacuum, even though the on/off switch light up on the dash.
Also make sure that the switches that these hoses connect to on the clutch and brake pedals are in the fully closed position ( pushed in) as a vacuum leak cane appear too.

[Caveman]

Thanks guys.....I'll check out those things you have suggested.

BTW it's a 95 Disco 1 manual.

I don't think it's the fuse, as the same fuse also controls the power mirrors and rear wiper (according to the owners manual); ans these still work fine.

Cheers

[PeterM]

Alrighty. My cruise control stopped working too and I left it for a bit and then I had a flash of inspiration to fix it.

As has been said, check the vacuum lines. If you peer into the footwell you'll see two plungers with vacuum line attached. These are above the brake & clutch pedals. They are a twist lock fitting & if not in properly will open the circuit, not allowing the cruise to work.

Working the way into the engine bay.......

The pump is located behind the left headlight under where a second battery would fit. Follow the hose back through the engine bay, checking for splits, joins etc. Near the Washer reservoir there is a T piece, often the rubber perishes & cracks around here because of the heat. Check, trim & refit if required. Also check the connection to the throttle body.

Hopefully you'll find the problem along here somewhere & you'll be right as rain. 8)

[Mudnut]

I had a 97 manual Disco, and had a recurring problem with my cruise control. Every time I tried to activate it, I would have to turn it off at the switch. When I turned it back on, it would work. Could be worth a try.
There is also various vaccuum lines in the engine bay that split, or come loose.

Good Luck,

Ken

[Rovernaut]

If you do decide to remove the pump re fitting is a bugger.
The rubbber pads have nipples that have to be put back into the holes on the body work of the vehicle.
I found by tying little pieces of twine to each nipple and then inserting the twine through the panel holes and pulling the twine from underneath I was able to pop the retaining nipples back into their holes.
Hard to explain, but if you try to refit then you'll see what I mean.

[Caveman]

Thanks again for all the useful info guys.....

After a bit of snooping around in the engine bay, the problem has been sorted out.
The vacuum hose connection to the throttle body actuator had split, and was obviously leaking.
A quick trim and refit, and it all works like new......well 10 year old I guess :wink:

Now to fix those oil leaks.... 8O

[Rovernaut]

Originally posted by Caveman
Thanks again for all the useful info guys.....

After a bit of snooping around in the engine bay, the problem has been sorted out.
The vacuum hose connection to the throttle body actuator had split, and was obviously leaking.
A quick trim and refit, and it all works like new......well 10 year old I guess :wink:

Now to fix those oil leaks.... 8O

Snipping doesn't last long, these rubber hoses with find a leak somewhere else, better replace it with a new one..
Been there done that