Quote:
Originally Posted by uzzo2
You are correct, that's what I meant to say, sender units.
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So were talking single wire units, that are showing resistance reading to ground thru the senders. The higher the resistance, the lower the reading. A loose, dirty connection or damaged wire will cause this. also an insulating thread sealer especially Teflon tape. To determine if it is gauge related, connect the sender connect wire directly to ground and the gauge should peg all the way over to it's max reading. IF it does, then there probably is a poor quality ground strap connection to the block (there are multiple ground paths installed at the factory. there are reasons for each of them. If the gauges max out, then that would imply the senders are not compatible to the gauge, but I have seen this procedure "wake a lazy gauge up". The problem of low readings sometimes occurs when the instrument panel has been updated w/ a different unit (like when upgrading to a panel w/ a factory tach, from a unit w/o a tach. Some panels require an oil sender p/u that has a matched resister built into the sender p/u(pick up). But as far as I know, the water temp sender is more universal and standard.