Hello, I wonder if anyone can help please? I have a W-Reg Fabia 1.9 SDi Classic. I was having problems with a discharging battery and so I had an auto-electrician check the vehicle over. He found that the blue "exciter" wire into the alternator was broken somewhere which means the alternator only kicks in when I rev the engine up quite highly before driving off. I put the car into Skoda but they said it would cost around

The DFM wire (the blue one) goes from the alternator to the engine ECU and dash board.

I would put

Lummox, thanks very much - I owe you

Oops, Did you repair that wire?

You might want to get somebody with VAG COM near you to clear the warning, then see if it comes back.

Also IIRC on my Octy I when the battery went flat due to the garage using it's radio all day the light came on, and needed a trip to a dealer to get it reset.

I have a problem like this, the battery warning light is on, and the battery is only showing 12V with the engine on or off. I tried reving the engine high and it didn't change the voltage.

It's an 04 Fabia VRS.

I have a problem like this, the battery warning light is on, and the battery is only showing 12V with the engine on or off. I tried reving the engine high and it didn't change the voltage.

Might just be a knackered battery - in the Fabia mine only lasted 4 years.

Chris

Does a knackered battery cause the battery like to show on the dash and stop the rear window heater working?

The car still started okay today. It's got to start once before, to drive to garage tomorrow.

Does a knackered battery cause the battery like to show on the dash and stop the rear window heater working?

The car still started okay today. It's got to start once before, to drive to garage tomorrow.

A bad battery will never cause the batt light to come on, this only comes on when the battery isnt being charged, you have or had an alternator problem, the voltage at the battery should be about 13.5V with the engine running if the alternator is charging correctly