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Cruise control problem

785 Views 6 Replies 4 Participants Last post by  rxt_ian
My Cruise Control Stops Working When I Switch Head Lights On, Can Any One Please Help To Solve This Problem In Mondeo 2006, Petrol Model.Regards.
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Ash,

I have split this from the IMRC thread and moved it to the correct section. Should get a better answer here.

:L
Checked your brake lights and rear sidelights,

Incorrectly fitted bulb making the system think the brake lights are on?

Or a power surge issue, voltage dropping as you switch thelights on?
Does it happen if you switch just the sidelights 1st then pause then switch the main lights on?

Try with the lights off and use the headlamp flasher, what happens?
I HAVE CHECKED THE BULBS EVEN AND ALL LIGHTS ARE FINE BUT PROBLEM OCCUR AS SOON AS I SWITCH SIDE LIGHT OR HEAD LIGHTS ON. CRUISE CONTROL JUST STOP WORKING WHEN EVER I TOUCH LIGHT BUTTON ONLY. OTHERS ALL FINE. REGARDS.
Check the earths for your rear lights. Its possible that when the current from the sidelights is attempting to pass through the bad earth it is making the cruise module think the brake lights are on
Thanks Buddy

But I Tried To Check In THose Few Days, But Could Not Able To Find Defects OR Earthing Wire. If You Please Show Me Fro where Do I Start ?

Thanks & Regards.
Sorry but I actually have a different car with the same cruise control system, so i dont know where the earth wires are
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