Thermostat sending sensors?

4x4fish · Oct 24, 2007

Does anyone know where the thermostat sending sensors are on the xj. I know there is one on the thermostat housing itself, but I've been told there are more. I want to make sure my gauge is reading right. Thanks, 4x4fish

Shorty · Oct 24, 2007

top, rear of cyl. head on drivers side (assuming 4.0L) is the one for the gauge.

4x4fish · Oct 24, 2007

Shorty said:
top, rear of cyl. head on drivers side (assuming 4.0L) is the one for the gauge.

Yes it is the 4.0L (1994 auto 4x4) Can you see the sensor back there?

XJ&CHZ4ME · Oct 24, 2007

yes, it is back towards the rear of the head on the drivers side and is in line with the valve cover bolts. It has a light duty wire like a 14 gauge ,or something of that caliber, that leads to it. It is a simple cap that pops off of it and a socket to take it out. VERY simple.

4x4fish · Oct 24, 2007

XJ&TJ4ME said:
yes, it is back towards the rear of the head on the drivers side and is in line with the valve cover bolts. It has a light duty wire like a 14 gauge ,or something of that caliber, that leads to it. It is a simple cap that pops off of it and a socket to take it out. VERY simple.

I will have to check this out, I think there is some kind of handheld reading device I can put up to it to see if it reads the same as the gauge.

Shorty · Oct 24, 2007

yes, an ohm meter-- it's just a thermister. Depending on temp, it has a variable resistance to ground.

*F Ohms
20 13,500
40 7500
70 3400
100 1600
160 450
212 185

hope this helps
--Shorty

4x4fish · Oct 25, 2007

Shorty said:
yes, an ohm meter-- it's just a thermister. Depending on temp, it has a variable resistance to ground.

*F Ohms
20 13,500
40 7500
70 3400
100 1600
160 450
212 185

hope this helps
--Shorty

What does Ohms mean?

Shorty · Oct 25, 2007

it is a measure of resistance in an electrical circuit. You can find a setting on any DVOM (digital Volt/Ohm Meter) to measure Ohms of resistance. Get a quality DVOM and read through the directions-- it'll make more sense (I promise)

--Shorty

4x4fish · Oct 25, 2007

Shorty said:
it is a measure of resistance in an electrical circuit. You can find a setting on any DVOM (digital Volt/Ohm Meter) to measure Ohms of resistance. Get a quality DVOM and read through the directions-- it'll make more sense (I promise)

--Shorty

Thanks, I'll have to check that out.

Thermostat sending sensors?

4x4fish

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