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#1 |
Registered User
Join Date: Mar 2017
Location: B-Spa, NY
Posts: 8
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Temperature gauge pegged??
Ok, I need help...
72 C20. Truck had a motor swap some time ago, never had the temp gauge hooked up. Bought a new sending unit, and was planning to install it, but noticed my gauge is pegged right/hot all the time. Regardless whether the key is turned on or not. Read through the forum threads, saw the diagrams, common issues , can't seem to figure out why it's pegged all the time. Found this handy diagram on here... -Seeing 12V on the post at 3 o'clock. -Seeing same 12v on the post at 9 o'clock. Going off to sending unit. -Found dark green cable leaving bulkhead, followed it.. it's disconnected in engine-bay. Seeing the same 12V on the disconnected end. -Ran continuity test from green-cable (engine-bay) to gauge post at 9 oclock... looks good. I would expect since the sending unit is disconnected in engine bay, the gauge would read 'low/left'? Not pegged high? I tried to jump ground on post at 6 o'clock to ground...nothing, still pegged. Now, granted my sending unit is still disconnected, but shouldn't I see that needle move a little left at some point? Oh, also pulled back circuit board from posts at 3 and 9 oclock.. no change. Bad gauge? Is my logic flawed? Do I just install sending unit, and keep my fingers crossed??? Help!!! |
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