Key Fob Issue

[JungleGus]

Electrics - not my speciality.

I have the original factory BMW alarm fitted, and am having an odd issue with my spare fob. When I insert a battery, the light is constant on, but dim. When I push the button, it lights up - but never turns off completely.

It wouldn't be massively surprising if 30 year old electrics are nearing end of life, are replacements available?

Cheers,
Gus

[haryj]

Have you got the type of fob with a angle on one end? If so they are very hard to get hold of. I would say get yourself into contact with an electronics expert, someone who repairs instrument clusters, ecu's etc. Give AC tronics or BBA reman a call, or alternatively a Auto locksmith who actually does repairs and not just replacements.

It can't be that much of a difficult fix. Hope you get it sorted!


Hary..

[Brianmoooore]

No experience of this particular fob, so this is a generic answer!
The 'light' on these fobs is usually a very simple circuit, comprising the LED, the push switch, and the battery.
The push switch in fobs is usually a very common surface mount type - a few mm square, black centre button, with four legs.
These switches appear in all sorts of electronic equipment, and I know from experience that they occasionally become 'leaky'.

Surface mount components are horrible to work on without the correct equipment, but not impossible if you have a good fine tip soldering iron, fine gauge solder and good short range eyesight. I used to have all three, bad sadly, the third component is now badly lacking.

Open it up and have a go. Start by removing the switch, and see if that puts the LED out.

[JungleGus]

That sounds about right - will give it a go! Cheers both