Re:Early CGT/4k/q: fusing the radiator & afterun (was Smoking Da shes)

[Luis Marques <marques@raytheon.com>]

Apparently there has been some renewed interest in fusing the radiator
fan in the 4k's, 4kq's, & CGT's.  I found my old post on the subject and
am resubmitting it for the benefit of all.  Only additional comments are
that cars without the after run feature (<'85) only have one 2.5mm
red/black wire going into the yellow plug.  Some have suggested that a
30A fuse isn't necessary and that a 20A will do.  It's your choice, but
if you experiment with smaller fuses, don't forget to carry spares in
case it blows at an inopportune moment.  I have been using the 30A fuse
since then (almost two years) without any problems.

-Luis Marques
'87 4kcsq

P.S.  I have all the old digests from 3/22/99 on (V4#3696 to V4#3838) in
case Dan can't get a hold of the last archives.  Great job keeping the
list running, Dan!



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From: Luis Marques 
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 corresponding 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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