1 fuel pump power diagnosis Thu Jul 20, 2017 11:20 pm
kstar
active member
Hi k-world, sad day for my 86' k100 lt (2v)... we lost power while riding and she will not restart. Managed to get back to my garage found CF et tal awesome tutorials very helpful to narrow down the issue to the fuel pump and/or connection.
So the pump is working, bench tested and it squirts. However I cannot energize the pump through fuse #6, so I suspected the fuel pump to harness connector. Decided to replace it, removed the connector and energized pump direct through the brown and blue/yellow wires... nothing pump does not turn still.
Next I removed the petrol gauge from the tank and discovered the black wire to ground terminal on the gauge is oxidized and crusty. Would that be enough to kill it??
I'm thinking short in the tank or in the external wires connecting to the fuel gauge... my next idea is to energize the pump by powering from the connections on the gauge. Is there a better way to diagnose shorts that area? Anything else I should consider?? happy trails, k
So the pump is working, bench tested and it squirts. However I cannot energize the pump through fuse #6, so I suspected the fuel pump to harness connector. Decided to replace it, removed the connector and energized pump direct through the brown and blue/yellow wires... nothing pump does not turn still.
Next I removed the petrol gauge from the tank and discovered the black wire to ground terminal on the gauge is oxidized and crusty. Would that be enough to kill it??
I'm thinking short in the tank or in the external wires connecting to the fuel gauge... my next idea is to energize the pump by powering from the connections on the gauge. Is there a better way to diagnose shorts that area? Anything else I should consider?? happy trails, k
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1986 2v K100 LT... K75c nose?
Clymers can only take me so far, thanks forum!!
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