Heater blower problems
 

Hi does anyone know where I can get a wiring diagram for the heater blower system for a b3 80, as my blower fan is only working on speed 1&2 and nothing at all on 3&4 if anyone has any idea what's wrong that would I would be grateful cheers

This is for the AC but the fan wiring should be mostly the same:http://www.getwiringdiagram.com/wiri...udi-80-png.png

If the fans working on a couple of speeds but not the others thats usually a sign of a blown heater motor rheostat, shouldnt be huge money and a second hand unit will more than likely fix it,

4v6 are you on about the resistor on top of the blower motor housing

'Heater motor rheostat' also known as THE SWITCH :tup:

I think youre right! :)

I only had a blower on speed 4. Replaced the heating resistor on top of the blower, pain in the arse but quick, and hey presto: all 4 speeds work again!

I had same problem on my 90, resistor on blower motor was the culprit. Hides behind the glove box. Find and press locking tab and twist/turn the motor and lift it out to get access
This is the part from memory.

http://www.ebay.co.uk/itm/NEW-Audi-8...wAAOSws65TrFVk