sorting temp sensors! but whats this plug for? (1 Viewer)

[hypoman]

guys ive rigged up an aftermarket guage and ran it off the wire in the pic (with the blue spade connector on it). i tried just joining it in conjunction with the original guage but the aftermarket one just jumped back and forth real bad. a new wire back through the dash worked well.

the sensor with the heatshrink connector end went back through the loom.

i noticed another temp sender pointing forward of the engine also on the same housing that had no wire joined to it. I cant find any other wires with a spade connector or any unused at all, except one with a 2 pin connector. it has a brown and a black wire on it.
can anyone tell me what the front sensor is for and what this loose plug is for?

thanks guys!

 

[coldtaco]

Would help if you said what engine/vehicle/transmission

 

[hypoman]

sorry its a lj78 prado with the 2lte engine and auto transmission.

 

[roscoFJ73]

These vehicles can also differ by year and market, so you should include all relevant details or put them into your signature.

 

[ozcrusier]

Its hard to tell but it could be from the air cleaner vacuum sensor is the air cleaner near it.

 

[Nas90tdi]

Not certain from your picture. But the temp sensor on the front of housing is for the A/C
Ar cleaner vac sensor is on the other side on the LJ78.
There is also an EGR wire in that same loom. If your EGR system is off the truck , it could be from that.

Try to post up a couple of better pictures of the sensor in question.

 

[Dprio34]

I'm pretty sure it plugs into this.
Right in front of your Boost Compensator.