PA-28 Archer II panel lights

cowman

cowman

Final Approach
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Aug 12, 2012
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Cowman
Hey I have a guy working on my instrument panel lights... the ones that backlight the flight instruments/engine guages/etc. He has tried replacing the transistor that controls it and the new one blew... also tried replacing the rheostat and blew another transistor.

He's pretty sure there must be a short in the system somewhere but he hasn't found it. Does anyone know of a trouble spot/common point of failure on these?

It's a 78 Archer II if that helps.
 
Well I guess he found it. Someone had run a wire up to backlight the compass and it was pinched behind the GPS and shorted out.
 
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