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aftermarket coolant temp gauge wiring question

smart_garrett
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smart_garrett Enthusiast

smart_garrett

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Hello, so i have my aftermarket coolant gauge wired to an sensor in the upper hose, the 2 wires can be seen going into the sensor, but I want  to use the existing port that is for the stock coolant gauge. The problem is there are 2 wires going to the sensor i have now in the upper hose, but only 1 going into the stock location where i want to wire my aftermarket gauge too. What do I have to do to wire it? I dont think the stock sensor is a 1/8th npt size either? (pictures below)

 

Thanks for any help

 

IMG_0950.thumb.jpg.e037045f9a66ce8ec51e9335c43db0a9.jpgIMG_0951.thumb.jpg.58a1612b0ed308eb097ecd9d374d6a2d.jpgIMG_0952.thumb.jpg.f86cea644009dfd035f08f4ed572beae.jpg

smart_garrett Enthusiast

smart_garrett

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11 hours ago, GTSBoy said:

Aaahhhh....take the single wire temp sensor out at your great peril and misfortune.  That one is for the ECU.  The 2 wire runs the dash gauge.

Ohh , I was told the single was for the gauge! Thanks for the clarification 

Ben C34 Grand Master

Ben C34

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Now I could be wrong, but I would have bet 5 bucks the single wire is the gauge sensor.

Based on this train of thought :

old cars had single wire for gauge, then efi came along and there were 2 sensors. I just assumed single is still for gauge. If I am right I am owed 5 bucks. Ig wrong the bet never officially took place.

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smart_garrett Enthusiast

smart_garrett

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2 hours ago, Ben C34 said:

Now I could be wrong, but I would have bet 5 bucks the single wire is the gauge sensor.

Based on this train of thought :

old cars had single wire for gauge, then efi came along and there were 2 sensors. I just assumed single is still for gauge. If I am right I am owed 5 bucks. Ig wrong the bet never officially took place.

Yea I thought it was the single too, that’s what someone else said too... that’s why I’m confused on the wiring

niZmO_Man Grand Master

niZmO_Man

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1 hour ago, smart_garrett said:

Ok, so can I just ground one wire from the new sensor and splice the other one into the old sensor?

I'm not sure as I haven't installed an aftermarket sensor. I guess you could try it. Do you have a separate temp gauge (in case the stocker ones dies)?

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