Cruise Control intermittant

hammy2909 · Jun 22, 2009

Uh...as says in title

1998 P38 4.6 HSE

Maybe vacuum gone/going? Buttons work fine when it's going.

Is it run off the pump for EAS? If so, pump might be going as the suspension is dodgy at times as well.

gavbriggs · Jun 22, 2009

the eas and cc are seperate. the cc vac is behind the eas box near the bulkhead, check connections!

hammy2909 · Jun 22, 2009

I can see that, but what runs the vacuum?

hammy2909 · Jun 22, 2009

Sorry....tw@t around. Right, so the little box UNDER the cc vaccuum runs it. Everything seems fine. Whats the tube that runs through the bulkhead? Does it fail often?

repgsm · Jun 22, 2009

your tubes are broken i suppose, for me after change, work 100%

Irishrover · Jun 22, 2009

Tube that runs through the bulkhead goes to a combination brake light switch/vent valve for the cruise which cancels the cruise when you touch the brakes. They do fail but are cheap to replace. The cruise pump is driven by a ecu and invertor ..looks like a red relay..both are located behind the dash, just below the instrument cluster. remove the drivers kick panel (One with the small vent by your knees)..4 blanking caps and screws underneath. The switch is operated directly by the brake pedal. Additionally, there is a comprehensive step by step fault finding procedure for the cruise control in the electrical secion of RAVE:behindsofa:

hammy2909 · Jun 23, 2009

Aaaaah, I didnt look in the electrical section. On RAVE, it just shows you how to take the vac off. Ta Irish.

Cruise Control intermittant

hammy2909

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gavbriggs

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hammy2909

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hammy2909

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repgsm

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Irishrover

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hammy2909

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