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My coolant temp gauge never works......88 4runner with the 3.0

Old 11-13-2007, 08:30 PM
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My coolant temp gauge never works......88 4runner with the 3.0

Yeah, my gauge works once every six months if I'm lucky...and I don't like that. Can anyone tell me where the sending unit is located so I can check it out, I'm not really familiar with these Toyota motors yet.

Thanks
Old 11-13-2007, 10:43 PM
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There's a cluster of sensors on the back of the manifold behind and under the plenum. The sending unit will be on the right side of the coolant bypass hose in the middle. It's a single wire...can't miss it.
Old 11-14-2007, 10:16 AM
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Alright...back by the firewall then. I'll have to take a look today...thanks.
Old 11-14-2007, 10:21 AM
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Not sure which one it is, but here's pic:
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Old 11-14-2007, 06:54 PM
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Find the single wire, take it off, and ground it with the key on. If the gauge goes up all the way, it works, and your sending unit may be bad....if the gauge does not move then the gauge is bad. I bought a cluster panel off of CL and replaced the oil and temp side of the panel...it worked out great. Those water temp gauges have a history of going bad. good luck
Old 11-15-2007, 08:53 AM
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cool...thanks...thanks for the pic up there too, I can see right where it's at.
Old 11-15-2007, 11:59 AM
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https://www.yotatech.com/forums/f116...hlight=coolant

this should get you fixed!
Old 11-16-2007, 09:53 PM
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you always could just get an aftermarket gauge from autozone. they are fairly cheap and they accually tell you how hot it is, not just a guess between the lines. it seems like this is a pretty common problem, and the biggest problem is sometimes its hard to notice that its not working, when the needle still "moves" just not with any relationship with your temp
Old 11-16-2007, 10:37 PM
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it prob wont move much if you dont have a thermostat... do you have one installed? luckily i havent had any problems with mine. the last time the engine compartment started steaming, the gauge needle was in the red.
Old 11-16-2007, 11:56 PM
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I guess I should clarify, just for the record. Mine doesn't move at all, and here and there it will, and read normally. I'm gonna fix mine up here shortly...maybe tomorrow. I did a quick "jiggle" test, but didn't see any result. So, I'm gonna bust out my meter tomorrow and fix it....unless it's the cluster...then I have to get one of those somewhere.

Just put on my pro comp bumper light bar though....oooohhh ahhhhhhh..nice.
Old 11-17-2007, 04:02 AM
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Originally Posted by mt_goat
Not sure which one it is, but here's pic:
Deja vu! Haven't we gone over this before?......


In case this helps anyone at all....
https://www.yotatech.com/forums/f116...stions-119003/

Last edited by thook; 11-17-2007 at 04:06 AM.
Old 11-17-2007, 05:22 AM
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Originally Posted by thook
Deja vu! Haven't we gone over this before?......


Yeah it's kind of like that movie "Ground Hog Day" hehe.
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