Engine - Drivetrain

Unfortunately that is 100% incorrect. There are seven wires to this switch, one for each gear, 1-5 and one for reverse, one for neutral. By your theory, every one of these wires should be hot. None of them are. This switch takes each circuit to ground when a gear is changed. Look at the OEM service manual wiring diagram for a TRX500FPM, this switch provides ground for the circuit. It takes each position to engine ground. There is absolutely NO power to the switch.

all honda's...including yours: the neutral light on the dash is ALWAYS hot at the switch, why ?, simple...the green/red wire leading to gear position switch is hot when key is on, when the light on the dash goes off when you change gears ?, this operation UNGROUNDS the light on the dash, herby at the gear position switch is no longer grounded with 12 volts, then the light on the dash turns off. when you shift back to neutral?, this again grounds the switch, which then makes the light on the dash light back up. confussing i know ?..but honda has done this for decades on all their atvs from day one. bottom line : gear position switch is ALWAYS HOT WHEN KEY IS TURNED ON. if your green/red wire leading to gear position switch does not have 12 volts going to it when you turn the key on ?, you need to find out why it does not ?. some atvs have what is called a diode plugged into the harness, see if you can locate this diode on your harness ?.

I think I misspoke in my video. Continuity wasn’t the terminology I was looking for. That gear position switch isn’t hot, there is never power to it. All it does is provide a ground to the appropriate wire that goes to the ECU, and the display on the dash. In essence, I was trying to determine that it was indeed providing that ground, which I should have realized it was, since it displays properly on the dash. So what I was doing was confirming that the green/red wire was indeed grounding as it should…..until I turned the key on. Why would the ground disappear? And since the coil is grounded to the frame, like the green/red wire in my test, is it losing ground when I turn the key on?

Hi, welcome to the forum!  I would probably need to see a few pictures of what you actually have going on. I will send my contact information to your message box if you’d like to contact me as well -AKATV  

I am also in need of a repair on a 37200-HN2-003. The back of the case is cracked open, and the display shows nothing. Are you still available to assist?