Technical front fog lights turn on with mes but not with button

[flisko]

front fog lights turn on with mes but not with button
mk2, not facelift

they worked before ecu swap, dash is flashing, still didnt do proxy alignment, could it be cuz of that?

 

[Ziggy122]

front fog lights turn on with mes but not with button
mk2, not facelift

they worked before ecu swap, dash is flashing, still didnt do proxy alignment, could it be cuz of that?

Maybe.....
But surely - its a bog standard switch relay and fuse setup....

its fusebox controlled not dash/engine ecu

Ziggy

 

[AndyRKett]

Maybe.....
But surely - its a bog standard switch relay and fuse setup....

its fusebox controlled not dash/engine ecu

Ziggy

Nope it's controlled by the body computer and the dash button is just a soft touch button and not an actual switch, which is why you can turn the fog lights on and off in MES

 

[flisko]

other car had fogs too, wonder why it doesnt work

 

[g8rpi]

other car had fogs too, wonder why it doesnt work

Because the car the other ECU came out of did not have exactly the same CAN configuration / addresses.
Do a Proxi-Alignment.
The other possibility is a faulty switch or connection so if Proxi-Alignment does not work read the status of the switch with MES.


Robert G8RPI.

 

[Ziggy122]

Nope it's controlled by the body computer and the dash button is just a soft touch button and not an actual switch, which is why you can turn the fog lights on and off in MES

Learnt something new there
Tbh I hardly use fogs...
Only pitch black lanes and the occasional morning fog...

 

[Brendan W]

Me too.
My fog equipment cost 40p. It's a brass hook that I hang the key on

 

[Scudmonkey]

Learnt something new there
Tbh I hardly use fogs...
Only pitch black lanes and the occasional morning fog...

They make things a lil Technical these days....the ECU for example will not let you turn on the rear fog light if you only have sidelights on...but it will let you turn the front fogs on....and of course if you have front fogs on then you can switch the rear one on whilst still only having sidelights on.
This is also why the Foglights don't automatically come back on if you've switched off the lights or the car, it's Impossible to forget to turn them off.

 

[Ziggy122]

I like the fact I cant leave my lights on
Except my towbar socket which keeps fog on till I send the command to turn it off...


Work vans can keep lights on with key off
But to turn lights off fog must be deactivated


Ziggy