At 02:08 PM 4/16/2010, Andrew Martin wrote: >Though I was irrationally hopeful that the new water pump might lower the >needle position on my temp gauge, it did not. I'd check the gauge calibration -- the markings are illustrated in Bentley and the resistances are 265 ohms for "just barely" and 35 for left edge of the overheat zone, light should be flashing. Unplug the sender and connect resistors from there to ground. Give it a couple minutes to stabilize for each reading. In your case if the high reading is correct then you either have a bad sender or a genuine hot-running engine. Poor connections will give a low reading. Also check that the voltage at the back of the gauge is 10v +/- 0.5. If it's getting full system voltage then both gauges will run high. Yours, David |
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