Temp Senders

[Jeffy]

Ok Swink, here's the color for the sender on the front of the engine.  18VT  That's 18 gauge/ violet, which happens to be the same color as what goes to the gauge.  

Looks like the rear temp sender is a 2 wire.  18BR/RD and a 18TN to the sensor.

The thing on the front of the intake on the 4.3L is a temp sender of some sort but I'm not sure if it's the gauge or PCM, or both. GM's FSM sucks.

[ratherbejeeping]

http://pg.photos.yahoo.com/ph/ratherbejeeping/detail?.dir=6f87&.dnm=7aa5.jpg&.src=ph

This looks to be my guage sending unit.  Single wire, and I can match the color to the plug where I got the oil pressure guage to work.

Now I just have to figure out a way to connect the thing.  It's either pipe thread or some metric stuff.  But I think I'll drill and tap the plug that's under the t-stat on the Vortec to make it fit.  Or if I'm real lucky I can just buy an adapter.

3rd one down in this pic

[Jeffy]

The one on the thermostat housing on the 2.5L looks like #3 and the one at the back of the engine looks like #2.

[ratherbejeeping]

that's what I meant.  I have one like #3 and it threads right in to the plug on the motor.  I have to figure out how to get #2 to thread in there instead.

[Jeffy]

JB Weld...

[JBFried67]

I did the infamous XJ guage swap and ended up ordering the temp sender.  I got one like #2, although the existing was like #3.  I just went to the junkyard and pulled the connector from another Jeep that uses #2, spliced it in place of the old wires.

[ratherbejeeping]

Got a clue that this could all be NPT, and Mr. Kilby seems to think that a 1/4 to 3/8 adapter will do the trick.  

I'll pick one up and see