Water temp senders

Michel, This is from a previous post I did. I hope it helps. You will need a ohm meter and a thermometer to check the sender. Sometimes it's easier to just put a new sender in if the gauge checks ok.

You may want to check to see if your temp gauge and sender are ok. Check the gauge by disconecting the wire at the sender and the gauge sould read nothing. Then ground the wire and the gauge should read max. To check the sender, it should be at 240 ohms at 120F, 70 ohms at 180F and 30 ohms at 240F. You can check it on the stove with water being brought up to boiling but sometimes it's just easier to put in a new sender!!!