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Re: Help with identifying something on fuse box
Makes sense if you think about it. If the default tank is empty (RH), and you need gas supplied from the LH tank, when the ignition switch cuts power to the solenoid, it moves back to the empty tank. With the relay in the picture, when the switched power is cut, it engages the always on voltage supply to keep the solenoid engaged, and therefore drawing from the LH tank. The solenoid requires voltage to move to the LH tank position. The system was designed to always move to the default (RH) tank in the event of an electrical failure. At least that is how it was explained to me.
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1980 Chevy K10 Silverado --> Build Page
My wife told me I spent too much time on Facebook. So I bought an old truck. Now she wishes I was on Facebook, it was cheaper. 
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