Re: Audi Bonfires

[Luis Marques <marques@ti.com>]

Ok, I have had a couple of people asking about how to rewire the car
such that the fan circuit is protected and since the search engine at
Coimbra isn't searching too well, here is the repost. HTH

Luis Marques
'87 4kcsq
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From: Luis Marques <marques@ti.com>
Subject: Radiator fan fuse retrofit
Date: Sat, 07 Jun 1997 14:31:59 -0500

I just did it! I have protected the wiring going to the radiator fan. 
The factory "forgot" to put a fuse in this circuit in the 4kq's, the
4k's, the Coupe's, and I don't know how many other models.  It turns 
out that fuse #5 was wired for this purpose all along.  Incorporating
this fuse into the circuit is very easy. 

This is the procedure:
 1) Lift the fuse panel.  There are two tabs at the ends that keep it
    in place.
 2) Find plug "E" on the back side of the fuse panel and remove it.  
    In my car it was yellow, the second or third from the front on the 
    driver's side.
 3) Look for the wires connected to pin 87L on the fuse panel.  There 
    should be two 2.5mm red/black wires connected to this pin.
 4) Remove these wires from the plug and reinsert them into the 
    location correspondidng to pin 87la on the fuse panel.  This can 
    be a little tricky; there is a piece of plastic that has to be 
    undone from the plug before any wires can be removed. Two tabs 
    hold it in place: one on the end of the plug and another inside 
    the plug.  A small screwdriver is handy here.
 5) Reassemble plug "E" and put it back in its place on the fuse panel.
 6) Put a 30A fuse on fuse holder #5.

That's it! You now have a fused radiator fan circuit.  There is only
one caveat: this only protects the circuit when the rad. fan relay is
powering the fan.  There is still no protection for when the after-run
relay powers the fan. However, there is a way to do this.

To have fuse #5 protect the rad. fan circuit at all times, you have to
find the wire that comes from the after-run relay into this yellow
connector "E".  It will be one of the two red/black wires.  You need 
to cut it from the connector at pin 87la and get a new connector and
put it back in its original location (pin 87L).  That's it.  The only
thing that you will need is an additional connector from a donor car 
in a junk yard, or perhaps the dealer.

Enjoy

Luis Marques
'87 4kcsq
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