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so when you jump th terminals at the relay the pump runs or doesn't run? also you cant use an ohm meter to check for shorts. this is the procedure to test for shorts
TESTING FOR A SHORT TO VOLTAGE NOTE: Refer to Test Probe Notice in Service Precautions.The following procedure tests for a short to voltage in a circuit.
TESTING FOR SHORT TO GROUND NOTE: Refer to Test Probe Notice in Service Precautions.The following procedures test for a short to ground in a circuit.With a DMM