E30 318is -90 fog light indicator lights up when I brake

[E30REDD]

As soon as I brake, the fog light indicator lights up about 50 % of its power.

Also, sometimes when I activate my left turning signal it flashes very fast. This happens about 1 of 10 times when I activate my left turning signal.

[E30REDD]

Clean the ground point just behind the lhs headlight by removing the wires, clean contacts, light copper grease and replace.. Do the one behind the glovebox while you are at it as well.

Okay, thank you.

Isn't there only a ECU behind the glovebox?

[Grrrmachine]

Ah willnz, the OP is Swedish so there might be some LHD/RHD confusion here.

The ground point for the Instruments on LHD cars is just above the pedals; you have to remove the kick panel around the steering column to see it.

[Brianmoooore]

I took it that it's the REAR foglight tell tale that's lighting up. If this is the case, then cleaning the earth point behind the LH headlamp isn't likely to help a great deal!
The problem is likely to be with the common earthing of the rear LH lamp cluster, which is likely to be centred on the earth pin of the plug and socket that comes apart when you remove a rear cluster bulb carrier.

[E30REDD]

Yeah, the problem occured because the rear plastic thing that holds the light bulbs in place was loose. Thanks once again