Wema fuel gauge wiring diagram11/26/2022 ![]() Jumped at switch with tank switch set on rear(bottom of switch pressed): center to top no continuity.Jumped at switch with tank switch set on fwd (top pressed pressed): center to top no continuity.Testing of switch with no wires connected :.I won't likely be able to get back to the boat until next weekend for next steps Here are my notes from 3 hours of diagnostics today. We can then tell you what terminals to play with to test out the switch and wiring If you get that far, take a picture of the back of the switch and post it. Testing is relatively simple assuming you can get to the back of the switch. It could be as simple as a loose wire on that switch or a bad switch. That is not that simple to trouble shoot if you don't understand the wiring and function of the dash switch. If nothing changes after these tests, you have a wiring problem somewhere between the sender connection and the dash gauge. If it does but didn't for the first test, you have a bad connection in your new wiring or the sender is bad. With the ignition on, try both positions of the sender select switch and see if the level read changes. If neither switch setting results in a reading other than empty, take the ground wire that you connected to the tank and touch it to the center pink connection on the fuel sender. If one switch positions results in a reading of gas level than your tank is not grounded and will need a new ground. As Skuntboat stated, wait a bout 30 seconds on each setting to see if you get a level reading (ignition has to be on but motor doesn't have to be started. Turn on the ignition and try both positions of the sender select dash switch (maybe marked, MAIN and AUX. As a quick test, run a wire from the ground tab on a tank to a battery negative post. ![]()
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