Wiring in new foglight switch

[Cyclistbruce]

Trying to replace the foglight switch. Keeping the original lights but the switch is broken. Does anyone know what the 3 wires are, presumably live, switch and ground but I can't work out the order and whatever I try causes a 'lampf' error! Or do I need a specific switch (just got standard one from eBay...)

 

[Mistacat]

The BMW switch is a single pole single throw with 2 led`s built in.
The violet wire from the switch which joins to brown at pin 3 on the connector is the ground. (BMW always use brown for ground).
The black wire from the switch which joins to a violet wire at pin 1 on the connector is to the relay .This looks to be the trigger to the coil. (I think the Haynes manual have cocked up again as they show this to be a switched live).
The white wire with grey tracer from the switch which joins to brown with violet and yellow tracers at pin 2 on the connector is the live trigger feed for the relay coil from pin 46 on the ZFE ecu.
So not sure of which switch you have but basically it needs to join the black and the white with grey tracer wires.
The violet is just the ground for the led illuminating and warning lights in the switch. These are the colours at the switch.

 

[Mistacat]

You do not say what year bike, although the wiring is the same colour code through out.
The Haynes relay wiring diagram for the twin cam is wrong, but it is correct in the pre twin cam Haynes manual.

 

[G5RJO]

LampF

I didn't think that the spotlights triggered a LampF as they were covered by a fuse.....

But as said above, (Certainly in the case of my 2008 GSA), the switch has 'Live in', 'Switched live to the spotlights' and an 'earth', The 'Earth' is there solely to allow the LED to illuminate.

Roger.

 

[Mistacat]

I didn't think that the spotlights triggered a LampF as they were covered by a fuse.....

But as said above, (Certainly in the case of my 2008 GSA), the switch has 'Live in', 'Switched live to the spotlights' and an 'earth', The 'Earth' is there solely to allow the LED to illuminate.

Roger.

I agree the spotlights are protected by a fuse and would not normally generate a LampF .
I read it that the op had tried connecting different wires which was generating the LampF , the relay coil live feed via the switch is from the ZFE. This grounded would cause LampF.

 

[Santa-2512]

Lampf is the generic warning for a blown bulb

it may be the error is a wiring / bulb issue in the foglamp it's self, hence the switch is wired in correctly and the the warning is correct

 

[Mistacat]

As mentioned by G5RJO the main spot/fog lamp circuit is not recognised by the ZFE as they are protected by 2 separate 7.5 amp fuses.
The ZFE will only detect faults in the control circuit , switch and relay coil.

 

[Santa-2512]

As mentioned by G5RJO the main spot/fog lamp circuit is not recognised by the ZFE as they are protected by 2 separate 7.5 amp fuses.
The ZFE will only detect faults in the control circuit , switch and relay coil.

AFAIK the hex head has no fuses, it's all sensed and dealt with via CAN

Maximum current and amp draw all monitored - hence the need to relay everything

The Wet head has fuses , but only two of them, and i'm not sure what circuits there on .

 

[Mistacat]

Hexhead has 2 No. 7.5 amp fuses to protect the spotlights.
Check the wiring diagram.
I don`t seem able to post it on here.

 

[Santa-2512]

Hexhead has 2 No. 7.5 amp fuses to protect the spotlights.
Check the wiring diagram.
I don`t seem able to post it on here.

Got it,

GSA only, hence why it didnt ring any bells (my guess is its a short additional loom running form the relay holder under the seat)

I like the way they split a single feed and then turn it into a twin fused circuit

I would wire one lamp in and work out the switch operation, and then swap lamps

it may be there is a short in one of the lamps

 

[Mistacat]

My diagrams show GS & GSA from 04 onward.
Although the lights were an option the wiring was integral with the main loom as the control circuit is fed was from the ZFE.
The op`s problem is not with the lights, it is with the switch which he is replacing with a non stock item.
I assume the reason for the fused supply to the relay for the lights was to save upgrading the live feeds to the ZFE for the sake of an optional accessory.

 

[botus]

the early bikes get a relay as part of the aux loom, the later bike doesn't (they are not interchangeable), lamp f warning for fog lights can be enabled on the later bikes if you want

 

[buncobooth]

I think that the original spot light switch is actually switched by the Canbus wiring but the circuit is external to it so I don't think it is a normal 12v switch. I replaced mine with a new one from the dealers and for some reason the little green light is on all the time (not just when the lights come on), so I went to the dealers and got it replaced. Same story with the replacement so I suspect the suppliers have made it more cheaply and nobody has noticed. I would love to know if anybody else has had this issue.

 

[Mistacat]

I have not dismantled a switch but the wiring diagram shows 2 led`s in the switch.
One is illuminated when there is power from the ecu (engine running) the other is also illuminated when the engine is running and the fog/spot lights are switched on.
I assumed one led was to illuminate the switch body.
On my TC the only led that is illuminated is when the engine is running and the fog lights are switched on.

 

[Mistacat]

the early bikes get a relay as part of the aux loom, the later bike doesn't (they are not interchangeable), lamp f warning for fog lights can be enabled on the later bikes if you want

All the bikes have a relay and fuses in circuit, The only fault that the ecu can detect is in the control circuit relay coil, switch and control circuit wiring.

 

[botus]

I modified the later loom to work on the earlier bike. I had to cut it up and add in the relay. the wiring is a bit odd as the switch does strange things. I have three drawings I made, but not sure now which is correct, having got it to turn the lights on OK the LED was not right.... my brother got involved and we rewired to get the led to do the right thing

with the ignition on, if the switch is on the switch led is green, if the engine runs (with switch on) the lights come on