Where is a vw microbus fan resistor located?

I presume you are looking for the resistors on the air-conditioner fan?

This description is for a 1997 2.6 kombi.

These are located in the rear duct unit. Most of the work requires two people (with lots of patience and understanding!)

It is a mission to get at. Remove the front ducting unit first. Watch out for the lamp on the visor and unplug these wires.

The section of ducting are each held on by two bolts to the roof. Be carefull with the grey sealing rubber as it is glued at the ends. Carefully prise off with a sharp knife.

Each section of ducting pushes on to the next and once all the ducting has been removed start with the removal of the rear unit by taking off the side pillar covers. Remove all screws holding the rear unit and lover onto a suitable stand (a 20lt paint tin worked for me.)

Now for the real fun part. The uppercover has to be removed. remove all screws and then carefully prise the glued rear edge apart. I used a pocket knife and slowly prised it apart took about 20 minutes.

After that presto! the two resistors are on each side of the fans. They have 4 terminals and should have 1.4 , 0.8 and two Ohms resistance between terminal. These are 80 watt suckers and I think that you would have to buy the parts from VW. I could not trace anything elswhere.

While you at it clean the evaporator radiator well! You don't want to go through all that again.

Hope this helps,

Henry.