[ardgour]

Hymer UK fitted cruise control to our van a year ago.

This week it has failed - does not lock on to a speed but the red light is on so is still getting power. Hymer are not being very helpful and they supplied absolutely no documentation with the system. It appears to be a Hella system fitted to a 2003 Fiat 2.8JTD. Anyone got any ideas for simple checks we can do before handing this over to specialist auto electrics?

Chris

 

[Spacerunner]

When a fuse supplying the flow meter popped on my X2/50 the cruise control also stopped working. Don't know what the flow meter is or where to find it. I just nodded my head wisely when given the info... :?

 

[ardgour]

Thanks Spacerunner

Can you by any chance remember if the indicator light on the cruise control failed or kept working when the fuse on the flow meter went??

Thanks Chris

 

[Spacerunner]

Every thing looked normal.
However I have to tell you that the cause of the fuse popping was a corroded reversing light. I kid you not.
Seems that the reversing light and the flow meter are on the same fuse. A minute bit of corrosion in the reversing light bulb holder blew the fuse and stopped the cruise control working and brought up the engine management warning light.

Took 'em a week to sort that one out... :lol:

 

[Pudsey_Bear]

not sure about yours, but some use vacuum to keep the speed constant, if yours is this type it could be a lose or split pipe.

Kev.

 

[MikeCo]

My cruise control failure was due to a constantly blowing fuse which also ran the speedometer,abs and handbrake light indicater.
Fiat said that it kept fusing because of a poor Scotchclip connection made to the main wiring harness ( Complete harness fitted as detailed in previous postngs).
In your case you say the red light is still on so it cannot be a fuse but it still could be a poor connection or simply a faulty cruise control unit.

 

[ardgour]

Thanks for the help
I'll check for other bits to see if any fuses are gone
Have llook at the vacuum system (though I'm not sure I know quite what I'm looking for! Then if no joy I'm off to the local automotiv electrics place - I cant face 600 mile round trip to Hymer at the moment with no certainty they will have a part.

Many thanks Chris

 

[CliveMott]

One classic cause of failures of after fit systems is that should the stop light fuse fail the cruise will not work (because it thinks that the brake pedal is pushed) Often caused by the additional load of a trailer.

C.