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I don't know what the probes are made of. It's a cheap harbor freight meter. I took apart the whole ground setup apart and cleaned it. Next time it warms up I'll flush it several times with good water and get a ph tester.

Ok so. I've had 0.30 with only the ground wires attached to the battery. Three posts disconnected!!!! Only one touching was the ground! How does that make any sense?? One thing I want to do is make the radiator and heater core isolated from being grounded but that'll take a little time. I need...

CUCV cab heater core multiple failures resulting in leaking of heater core in... Better off just doing a test to see if you have current going through it. It doesn't take long for water to drain out of the system, it's not like it's molasses. If you haven't played with electrolysis, then it...