Fan stays on

[Huw Powell]

> I went to start my 89 90Q this morning and found the
> battery totally flat.  So I put the battery charger on
> and the radiator fan came on,when the engine is stone
> cold.  Could this be the thermostatic switch that is
> mounted on the side of the radiator?

you got two senders that can turn the fan on.  the one you mention and
the after run one, on a bracket at the back of the head.

get the fan running (battery charger?), and undo each of these senders
connections.  if it stops, you prolly found a bad sender.

if neither one stops it, proceed to the relays they trigger.  Pulling
them will narrow down which one is the problem.

If you're lucky you won't have to cope with anything more complex than
this (like finding melted/shorted wiring harnesses)

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/