C4 cruise control fault

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Mballox
Posts: 2
Joined: 12 May 2019, 07:28

C4 cruise control fault

Post by Mballox »

Hi I hope someone might have seen this before.

C4 Grand Picasso 2007

I put cruise control on and after 2 seconds the cruise control goes to off and the speed location flashes with the two lines.

No errors recorded in the log

Help!
wheeler
Posts: 5873
Joined: 21 Sep 2002, 19:07
x 449

Re: C4 cruise control fault

Post by wheeler »

Could well be a faulty brake switch, I believe there was a modified switch/harness for early model C4 picassos. It may not show up as a fault as it may just think the brake is being pressed when its not being pressed so cutting off the CC.
Mballox
Posts: 2
Joined: 12 May 2019, 07:28

Re: C4 cruise control fault

Post by Mballox »

I had put the modified loom and brake switch in as we had the gearbox jumping from auto to manual. Which this fixed and the cc worked

I wonder if the new switch could have failed in 2 years though