Battery light not working

[hermanio]

my alternator light is not working when i put the car on ignition. because of that my alternator wont charge the battery at low rpm. could anyone give me some information about te small blue cable on the alternator. it is supposed to run to the dash battery light. but can someone tell me were it connect in the dash so i can look for a broken connection

[Jonnybravo]

The Vauxhalls which I am more familar with use the same wiring back to the dash, chances are its the same on the Audi.

Bulb may of gone or wiring is broken, or course alternator has failed.

[hermanio]

alternator is already changed, and bulb is not broken. also changed the instrument cluster. so it needs to be the wire. how can i check the wire ?

[Jonnybravo]

Multimeter, check the wire from the dash to the alternator with it. I think the wiring, certainly on a S2 is part of the car loom not engine loom.

[hermanio]

does anyone have a diagram wich wires to check behind the dash

[hermanio]

noone knows were the blue cable connects to in the instrument cluster ?

[hermanio]

allready found the problem. the cable was broken. i run a new wire from the 10pin yellow auxiliary relay carrier. now it work fine