Radiator Fan relay sticking - '86 4kq

[Dave Conner]

Huw,
I think I'll modify my wiring to run the fan thru a 30 amp fuse.  
My research indicates, for US Audi's, the same fan is used in 84-87 4kq, 81
- 87 coupe gt, and all 5k with A/C from 78 - 84.
Since a 30 amp fuse works in your Coupe GT, I expect it will also work in
the 4kq.  If it blows that would be a clue that too much current is being
drawn, and probably why the relay's are sticking... so time for a fan
replacement.
Thanks for the info.
Dave C.


>> I think the largest fuse suitable for this socket is 30 amp, and would be
>> inadequate for the fan, which runs thru a 40amp relay.
>
>nah, 30A ought to be fine.  You might even want to try lower values and
>use the smallest one that doesn't blow.
>> 
>> I could protect the fan with the type of fuse used to protect the fan on
>> the newer 100/200/v8 models.
>
>if you use too large of a fuse there is no point to it - remember you
>want the fuse to blow before the wire smokes, that's the important
>thing.
>You're not protecting the fan, you're protecting the wiring.
>I am certain I used nothing larger than a 30A fuse on my coupe.
>Huw Powell