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Okay, then we already established that they do work and run sometimes which means the wiring and pumps are good at the tanks.
We need to check relays under the hood in the power distribution box and also check for power from the ignition switch as well.
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I said that it was inside the power distribution box under the hood near he battery. All the relays are marked on the cover of the relay box. If the relay is good, then there is an ignition switch issue. most of those relays are interchangeable too.
No diagrams available on that due to the age.
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Then that relay has to be on the fuse box. If push comes to shove, we can follow the wiring back from the tank to the relay. The only other place that may have a diagram of something that old would be the library. There's always more than one way to do this:)
The wires are in color codes to follow them back and do voltage drops on them. There's no magic here, you do have to work with me here a bit. It's not that hard to follow a circuit.
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