Hi, My cruise control is not working!!! In my workshop manual, the owner has written that a Vaccuum Pump Motor was installed to correct this.
I need to buy such an item ,then install.
Should this correct a non working cruise control? Is it better to buy a new one? The light works in the dash, and you can hear a click in the dash when turned on.
I hope someone can help with this problem.
Ian.

AC has nothing to do with cruise... He is talking about the vac pump behind the washer bottle... not the fan motor in the heater box...

The cruise light and noise from the console indicates cruise is on... It does not indicate it is set a speed...

My initial problem with my car was that the clutch pedal was broken and the clutch pedal was pressing on the cruise cancel button (or rather not lifting up far enough to get it engage)... if yours is an auto climb into the foot well and look up to the brake pedal... the higher harder to see switch turns on the brake lights... The lower switch cancels cruise... make sure the pedal is pressing the button in when your not on the brakes... If not adjust the switch...

Make sure the two wire plug is plugged onto it and also the vac line...

Next thing to check is to pop the horn pad off and make sure the buttons are properly plugged into the wheel as mine weren't plugged in when I bought my car...

And next thing is to take the wheel off and there is 3 brass pins in the back that make contact with the boss in the back of the wheel... Make sure these aren't worn away and not touching the wheel (making the buttons not work)... Your on/off works so just looking for the set coast switches...

after that your looking for trial of new components... gets complicated... maybe a vac leak somewhere...

but I've never seen one of those vac pumps fail so I doubt it'd be that...

Goodluck with it...

Thanks guys for your help. Will give me something to do. . Especially from timmytimtim. Ian.

no worries matey... Like I said they are the easy to find things... After that its trial and error of replacing things hoping for the best...

the a/c and heater controls are vacuum operated with vacuum from the engine...

the cruise control operates on a seperate system.. it has its own electric vacuum pump that give the cruise diaphram its vacuum...they are not interlinked in any way..

Hi uniacidz,
thanks for your info, I am sorry that I did not reply to you in the first intance. My air con is working properly. Once again, thank you for your time in showing interest in this query. The only reason I know anything about this, is that I found a hand written note in my workshop manual, which came from a guy in Sydney, not with the car. It says, Grady,s Electrical installed vaccuum pump motor to correct cruise control not previously working.
I do not think that I will be able to do this job, as age has passed me(arthritis) etc etc etc. The worst is two knee replacements.
Cheers Ian.

sorry to dig up an old thread, did you ever manage to figure out what was the cause of the problem yourself or via a third party looking at the vehicle ?