[urq] radiator fan switch

[laraa at sympatico.ca]

Hi Jim, 

Point one : 

Yes the new switches are of the 3 pin variety and they might be more robust
but I don't know this for a fact. One is ground (a multimeter will tell you
which one via continuity with the body of the switch), the next one (in the
middle) is the 85 degree switch while the other one is the 102 degree
switch. Plug the two wires to the ground and the middle one and you'll have
the low speed fan circuit functional.

Then, look at the hose that comes from the bottom of the coolant reservoir,
there will be an aluminum tube with two other wires : this is the high speed
switch (which is dead now I am quite sure and discontinued). Remove the two
wires from it, lengthen the one that is not ground to reach the switch at
the bottom of the radiator and plug it to the remaining pin on the 3-pin
switch. That way, you'll have both circuit functional. 
Airtex is a well known aftermarket supplier. But beware that any switch you
buy will die shortly if your fan comes on often and for long period of time.
My car that sees many slow speed ice lapping events (the fan is on for
almost the whole 15 minutes) kill a switch at each winter... At 15$, I have
always a new one ready.

Point two :

The plug for the transmission is a 17 mm allen. Heat is needed to release
the galvanic corrosion between it and the housing. Buy yourself a cheap
MAPP+oxygen torch like this one (http://tinyurl.com/law6kc) and you're good.
Propane only is not hot enough IMO.
http://www.bernzomatic.com/PRODUCTS/KITS/TORCHKITS/tabid/215/ctl/Detail/mid/
1147/xmid/6954/xmfid/3/Default.aspx 

Louis-Alain

-----Message d'origine-----


Hello! One quick one... or two. Looking for the right replacement part for
the radiator fan switch. I have discovered most of them that I have come
across are three pin. My old one is two. Just wondering if three pin will
work. If so, brand of choice and who has it. Also, found a two pin but the
brand name is not familiar to me. Anyone have experience with Airtex 1S4375?
Last, trying to get the tranny filler plug out and its way stubborn!!! Any
BTDT advice? Any better replacements if I get it out?
Thanks a bunch!

-Jim Miller
'83 urq waiting for fresh winter coolant!