typ44 questions...again :<)

[JordanVw@aol.com]

well, on my quest to find out why the coolant level warning light comes on 
about 1 minit everytime after i start my '86 5kTQ (and its not the switch at 
the bottom of the expansion tank, either) i was checking the wires at the 
thermostat.  this is the the "multi function sensor" switch that is located 
where the top rad hose goes into the block, the switch that points down, with 
a rubber boot covering the wires.
well, first of all that rubber boot does more harm than good. i pulled it 
away from the switch, and the wires behind it were corroded from moisture 
getting trapped in the boot, ant not drying out. apparently this switch is 
supposed to have 4 male prongs.   well, mine doesnt.  ???  the one on my 84 
5kT DOES have 4 prongs... also the female plug that plugs onto the switch had 
4 connectors on it, not 3. so there's one wire that's not doing anything. (a 
blue one) . the female plug is pretty well FUBAR'ed. 2 of the wires broke off 
of it. anyone ever replaced this plug? the heat has taken its toll on the 
bakelite plug, and it's just all crumbly to the point where it wouldnt hold 
the female connectors anymore, so i crimped on some generic ones. 
anyway, i plugged it all back in, exept for the blue wire, which didnt have a 
prong to plug into.  somehow i think this is the wrong multi function sensor 
switch, since it only has 3 prongs instead of 4.  will the multi function 
sensor switch from a '84 5kTurbo work on a '86 5kTQ?  i have a good one on my 
84 5kT parts car, i might as well use it if its the same switch.  
also, when replacing this switch, any tips? should i use some of that white 
pipe sealant stuff, to prevent leaks?

also, regarding my non working (intermittantly) brake lights - the brake 
light switch is above the cruise control shutoff switch, on the pedal right?  
well, i had a hard enough time seeing the darn thing (had to use a tiny 
mirror) how does one get to it to replace it???  i didnt see anything on 
replacing the brake light switch in the Bentley.. 

thanks for all those of you who have helped on this so far, and i appreciate 
your help -

chris
'86 5kT, TQ