VY Berlina Cruise control issues

[Sdel179]

Just wondering if anyone else's cruise control just turns off when you hit bumps on the road like expansion joints on bridges.. I have noticed a few times it won't engage.. I'm starting to think it's related to the brake light switch, as it cut out yesterday after a jolt from the expansion joint on the bridge going to work then wouldn't re engage unit I pressed the brake an few times, then worked again ( oh the joys of 13 year old holdens..at least it's not a same vintage vectra or Astra hey

 

[Not_An_Abba_Fan]

That is exactly it. You can try spraying the switch with some WD40 and see if it improves, it may be adjustment or it may be a buggered switch.

 

[south123]

Maybe the return spring has lost it's strength and is allowing the brake pedal arm to hang down a bit further than it should therefore activating the plunger, have someone follow you over a bumpy road and see if your brake lights keep coming on and off, or another way is to when you are about to go over a big bump put your foot under the pedal and lift up slightly and see if the cruise control still deactivates.

 

[Sdel179]

Thank you both..I will be on night shift next week I can see the brake light in the back window then.. I will see what happens when I hit the same spot..80% of the time it cuts off..