Re: 87 iroc cant find temperature switch
Try drvr side cylinder head between #1 & #3 cylinder exhaust ports.
If you measure the resistance of the sending unit with the engine cold, center lead of sending unit to ground, it will read a high resistance, ie, 5K or more. As it warms up, it will read less than 200 ohms.
You also might try banging the dash with your fist to "unstick" the needle. With key off, the needle may go back to cold. With sending unit unplgged, and key to on, needle should go to cold. Hit dash at black square!
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