i've done what the stickied thread suggested. ground the brown/black wire to chassis and needle should show temp properly on cluster.

however it is not working. i checked to make sure the ground was good with a multimeter and the same issue....

anyone have other ideas?

What year is your SC? Did you try the 330 ohm resistor method?

Personally, I would run a good aftermarket water temp gauge, IMO it would be alot more acurate than a stock gauge. good luck

well i haven't tried the 330 ohm resistor method yet. when i search for it. i get stuff not related to my quiry...

my check engine light doesn't come on either, yet i can still start the motor up. i need to recheck my wires... i didnt extend the engine harness. so i know its not there. it must a ground that came loose in the body plugs to engine harness.

You need to do the check engine light method to get it to work. Search for "1jzgte temp" or something along those lines. There are multiple threads about it. It's a yellow/green wire behind the cluster

I fixed mine for good a couple months ago. I of course tried the easier method of grounding the wire that everyone says to ground. It didnt do a damn thing. I went to radioshack got a 330ohm resistor, found the yellow/green stripped wire thats in the center cluster plug and put the resistor in there. My temp gauge now works just like it did when the car was stock.

What year is your SC?

Mine or the OP?

OP..

Check Engine:

https://www.clublexus.com/forums/per...-1jz-swap.html

im looking for the temp fix.. give me a few..

BOOM!

Temperature Gauge:

https://www.clublexus.com/forums/per...with-pics.html

ugh @ myself.

two wires came undone in my harness extention work i did. i redid it and secured the wires with many zip ties.

everything worked this time.

ok lemme re-update. i fixed some problems with my harness. however the temp gauge doesn't work still. still goes up to H,

ugh. maybe i should try the resistor method. do i go to radio shack or somethin to get that inline resistor?

Yes you should be able to get the resistor from radio shack or a place like Frys

i'll try to get over to them today. i need my temp gauge to work. its really keeping me from driving my car right now. so i can get it to the exhaust shop.

Make sure you solder it and heat shrink it.

^^
You wire the resistor inline with the wire correct? Never found the correct description of that.

----RR----

Like that^?