Bench testing the probe in the expansion tank. Tilting the tank such that the coolant in not in contact with the probes, the buzzer sounds. I will be installing the tank into my 85 300D for field testing once I put the circuit into a pill bottle.

Will report back in a few weeks on how it's doing.


CLICK TO PLAY!

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked