coolant/water level sensor sources?

[mikey72]

1989 MCI 102c3 - looking for a new coolant level sensor.  Coolant Low telltale stays on.  Confirmed there's water/coolant in overflow tank.  When I pull the plug/wiring from the sensor, the telltale light turns off.  I'm guessing the sensor is shot?

[Gary Hatt - Publisher BCM]

You should be able to test it with an ohm meter and a pan of water, but don't ask me how.  But someone should know on here. 

[mikey72]

yeah, I used a bottle of water and my multi-meter to see if resistance changed but there wasn't any change regardless if the sensor was in or out of water.  I'm guessing it failed open.

[Geoff]

Trucks use the same sensor.  I would look on eBay or go to a truck parts store, or even Napa ($$$).

[mikey72]

ended up calling US Coach..should have it in a couple of days.

[richard5933]

While you're in there installing the new sensor, might be a good idea to check all connections and terminals for corrosion. That's what caused mine to give a false signal. Could probably have got it working by just cleaning things, but the corrosion was so bad I couldn't get the little nut off.

[luvrbus]

You can get a sender from O'Rileys that will work with a bushing for 10 bucks it doesn't need the long probe fwiw even one from the windshield washer tank works lol I am on the cheap side