Working through some electrical issues in the WB140, turn the key, get the normal lights, can hear the lift pump ticking, but won’t attempt to turn over. Can jump the starter solenoid, starts just fine. The starter / safety relay has 3 inputs
- 12V from the fuel pump circuit, measure 12.3V when key is in the start & run position
- 12V from the key switch, which passes through the neutral relay, have 12.3V on this pin when key is turned, direction control in neutral, 0V when not in neutral
- An input that goes to the alternator and tachometer, measures 0.1V when trying to start.
I can tie all 3 inputs to the start / safety relay to 12V, unit cranks just fine. So I suspect the 0.1V from the alternator is my problem. Unit has a Hitachi 4-wire alternator, 1 pin plus the output goes to the battery, one input goes to the fuel pump 12V circuit through a 100- ohm resistor and there is the wire leaving the alternator that goes to the safety relay & tachometer. Does anyone have any info on this alternator and what the separate wire leaving the alternator does? Next step is to check the 100-ohm resistor (no idea where it is) and verify there is 12V on the resistor.
- 12V from the fuel pump circuit, measure 12.3V when key is in the start & run position
- 12V from the key switch, which passes through the neutral relay, have 12.3V on this pin when key is turned, direction control in neutral, 0V when not in neutral
- An input that goes to the alternator and tachometer, measures 0.1V when trying to start.
I can tie all 3 inputs to the start / safety relay to 12V, unit cranks just fine. So I suspect the 0.1V from the alternator is my problem. Unit has a Hitachi 4-wire alternator, 1 pin plus the output goes to the battery, one input goes to the fuel pump 12V circuit through a 100- ohm resistor and there is the wire leaving the alternator that goes to the safety relay & tachometer. Does anyone have any info on this alternator and what the separate wire leaving the alternator does? Next step is to check the 100-ohm resistor (no idea where it is) and verify there is 12V on the resistor.