I have a 10 year old Zafira that now keeps running when I take the keys out but only if the lights are on! not only that the brake lights are not
going off either ahhh! stupid car
I've checked the earths and there all clean and copper greased, apart from this it runs fine. The electrics are so complex I can't even
figure out where the problem is 
I have checked the brake switch but that seems fine
Any ideas? thanks
(changed the title seeing it is now fixed for future reference)
[Edited on 24/12/12 by Mr Whippy]
I hate vauxhalls 
Edit: to say it sounds like a stuck relay?
[Edited on 24/12/12 by mookaloid]
found the prob, just mental
a few months ago I fitted LED tail light bulbs, just changed them back to normal ones and all is well, seems the engine was running through the bulb
when the light circuit was on
tbh it was a lucky guess though, just shows how odd the electrics is in modern cars, will put the bulbs in the landy instead....
cheers
[Edited on 24/12/12 by Mr Whippy]
Some Vauxhalls have a "Multi function" relay that can cause an awful lot of problems, not sure if a ten year old Zafira has one but it does
sound like a relay sticking? . It seems strange that the brake lights don't go off?,Does the engine still run with the brake light switch still
connected? might be worth checking that it has the correct bulbs fitted in the rear lights ? If the lights are on, causing the brake lights to be on
due to an incorrect bulb, it could be the ignition is being back fed ? Take the bulbs out or disconnect the wiring to test?
Must learn to type faster!!
[Edited on 24/12/12 by rusty nuts]
thanks you were close to the problem, I just looked for things I'd changed, would never suspected fitting LED bulbs would cause such effects
It's a lot more common a problem than you would think, I recently had a Nissan in for an MOT that had the front side lights coming on when the brake pedal was pressed, the car had been into the main dealers the week before to have the problem sorted, they couldn't find the problem(muppets) It was due to having a single contact bulb instead of a double contact bulb for the stop/tail light
With CAN Bus system you can get odd electrical problems wipers can come without being switched on or one side light can come on for no reason try
disconnecting the battery for a couple of minutes, check all the battery and earth connections are clean and secure.
Most CAN Bus systems get up set if bulbs with the wrong resistance is fitted even if there is no bulb failure warning system fitted to
particular model.
[Edited on 24/12/12 by britishtrident]
quote:
Originally posted by rusty nuts
It's a lot more common a problem than you would think, I recently had a Nissan in for an MOT that had the front side lights coming on when the brake pedal was pressed, the car had been into the main dealers the week before to have the problem sorted, they couldn't find the problem(muppets) It was due to having a single contact bulb instead of a double contact bulb for the stop/tail light
quote:
Originally posted by britishtrident
Just needs load/ballast resistors.
I've got a mk1 Fabia vrs as a tintop and every now and then the window switches swap function, so the left does the right and vice versa, switching the car off and on again cures it. Canbus and digital coded parts are a nightmare!!!!!
In these cold starts my 206 tells me there's an airbag failure, same as above switch it off and on the problem's gone. If that's all the electrical gremlins I get I'll be happy with that.
Dont think Zaffy A's run off the canbus system. Sounds like typical VX build quality
My vxr does random things all the time, one canbus wire runs about 5 different unrelated things.