Re: Relay stuck - radiator fan, 86 4kq

[David Boyd <john@dboyd.demon.co.uk>]

In article  on Sat, 29 Aug 1998 <3.0.1.16.19980829094359.2fdf42da@mail.c
fm.ohio-state.edu>, Dave C. <conner@cfm.ohio-state.edu> spake thus:

>The radiator fan occasionally continues to run on after the temperature
>drops to the point where it should stop.  I can make it stop by tapping on
>the relay.  There are three identical relays in the fuse block and I've
>swapped them all with the fan relay and it has happenned with all of them.
>The other two are for the A/C and the horn.  This doesn't happen every time
>but it's too often to ignore.  
>What is causing this?  All these relays are probably old but they work OK
>for the horn, and the A/C has been removed so I can't say how that
>functioned.  Would a shiny new relay fix the problem or is something else
>at fault?  
>Ideas anyone?

My 100 had the converse problem - intermittent failure to run the fan
when the temp. sensor demanded. You can usually verify the proper
operation of the relay in a rough and ready way by listening for the
click of the contacts when the sensor cuts it in and out. It appears
that any old VW/Audi relay (or indeed probably any others) of equivalent
amps rating and pin configuration will work (some are metal cased
Hellas; others larger, plastic cased (Bosch ?) and I replaced mine with
another from a collection acquired from salvage yards.

 
-- 
David Boyd
mailto:john@dboyd.demon.co.uk
Cumbria, UK