Boot Light Switch

Mon Nov 30, 2015 6:38 pm

My boot light stays on continuously even when the light switch is pressed, so I am presuming faulty boot lid light switch.

Anybody know if it is the same part as the interior light switch for the doors? Or specific part. Cant find it on realoem

Mon Nov 30, 2015 7:25 pm

http://www.realoem.com/bmw/enUS/showpar ... Id=61_0776

Ben

Mon Nov 30, 2015 7:28 pm

Difficult to see how it can fail 'on'. Take it out and check it over, along with the wire to the lamp.

Mon Nov 30, 2015 8:10 pm

BenHar wrote:http://www.realoem.com/bmw/enUS/showpar ... Id=61_0776

Ben

Thanks Ben.

The one fitted currently doesn't look like the one picture on realoem.

Mon Nov 30, 2015 8:11 pm

Brianmoooore wrote:Difficult to see how it can fail 'on'. Take it out and check it over, along with the wire to the lamp.

What would make it fail to switch off? I have held the switch pressed in for about 10 secs and still didn't switch off. Wire going to the lamp is fine

Mon Nov 30, 2015 9:03 pm

RobWill116 wrote:
BenHar wrote:http://www.realoem.com/bmw/enUS/showpar ... Id=61_0776

Ben
Thanks Ben.

The one fitted currently doesn't look like the one picture on realoem.

Pictures in there are not always accurate and there seem to be quite a few different part numbers depending on the age of the car.

As Brian says, remove and inspect yours.

Ben

Tue Dec 01, 2015 1:26 pm

willnz wrote:Remove the switch and unplug the wire from it without disturbing the wire as much as possible. Does the light stay on or go off?

I have removed the switch and the light stays on. I've took the lamp out at the moment so the battery doesn't get drained whilst its garaged up. Light wired up to constant feed instead of the switchable feed?

The housing of the switch has a crack in it, no other obvious signs. Haven't tested the switch yet though, will do tonight

Tue Dec 01, 2015 1:35 pm

On the rear of the switch, should there be two connectors like the interior door switches? This only has one connector

Tue Dec 01, 2015 1:39 pm

What colour, and how many, wires are connected to the light. There's a remote possibility that an incorrectly fitted or faulty alarm is causing the problem.

Tue Dec 01, 2015 10:00 pm

They are 3 wires as pictured below -

Black, black/brown and brown/black

The brown/black on the far right goes to the switch

Tue Dec 01, 2015 10:09 pm

Disconnect the LH brown/black. It probably goes to an an alarm.
Replace the bulb, refit the light and the switch, and see if it behaves then.
Wire on the far left is red/green BTW, not black. That's just an outer sheath.

Mon Dec 07, 2015 12:29 pm

Brianmoooore wrote:Disconnect the LH brown/black. It probably goes to an an alarm.
Replace the bulb, refit the light and the switch, and see if it behaves then.
Wire on the far left is red/green BTW, not black. That's just an outer sheath.

Disconnected the LH brown/black - it now works as it should! Thanks.

Will disconnecting this may the alarm play up now though?

Mon Dec 07, 2015 2:07 pm

The alarm is already playing up if it's shorting this wire to earth.
Next stage is to remove the glove box access panels, find the other end of the same wire where it comes up from the sill area, disconnect it from the alarm, plug it back onto the boot light, and see if the light still switches off.
Might be worth inspecting the wire where it runs along the LH boot hinge first, to see if it has become trapped anywhere and is shorting out there.