That's a good point. It sounds like a reasonable preventive modification would be to put a 2-amp fuse (maybe a 2-amp slow-blow fuse) in the power supply line to the auxiliary water pump. I can see how you'd just about ruin a control pushbutton box if it directly controls the auxiliary water pump and the pump shorts.

My fix pretty much only helps if the pushbuttons are intermittant. Fortunately this is the root of all my ACC problems so far. It was rather disturbing to have the AC compressor come on in the OFF or ECONOMY positions. Kinda cuts the fuel mileage a bit.

So far its been working perfectly. This also fixed a spasmodic flap somewhere in the interior of the dash that was actuating back and forth randomly. Maybe a fresh air vent or a high-low air redirector.

Ken300D