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Subject:Re: camper water level indicator
From:David Beierl
Date:Fri, 14 Jun 2019 17:26:49 -0400

>
> Can I jump on this thread to ask about the LED light near the bottom of
> that same panel (on my 87 Westy).  I think the light is to indicate that
> the fridge is working on gas.
>
> Mine has never worked and it would be nice to have.  It's hard on the neck
> trying to see the flame through the tiny window at the bottom of the
> fridge.  Does anyone have any thoughts on what the cause and cure might be?
>

Likeliest is black wire in LED panel harness unplugged from single
connector in fridge harness.  Or wire unplugged from the terminal where the
thermocouple screws into the gas valve.

After that likeliest is right-hand chip is bad.

You *cannot* test this with a 1.5V battery.  The signal goes negative to
chassis ground, and the absolute maximum voltage for the chip negative to
the negative supply pin is 350 mV.  If you can make a voltage divider
limited to say -250 mV max you could use that.

But when in doubt, replace the chip.  Chips failing and the power switch
coming unsoldered are about all that goes wrong with the board.

Yrs,
d