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Massimo 550 utv neutral light

Jr Perez

By Jr Perez
in Massimo UTV SxS Forum

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That's good. The shift lever switch should be OK.

I would now be looking at at a bad ground for the light, or wiring harness damage that would allow +12 to appear on the ground side of the light when the main switch is on. Trouble is that the schematic doesn't have a detail of the meter showing where the Neutral light gets it's signal.

Is this a HISUN or LINHAI unit? The only service data I have is for the LINHAI chassis.

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OK, now I see it. I presume that the light stays off when the shifter is in Neutral and the engine has started.

With the limited service data available and not having opened one up, my best guess is a defective meter head. Without a detailed schematic of the speedometer module, the source of the signal for the light is unknown. The service manual only has a wiring diagram which does not show an external source for the light.

What you are seeing is a condition where all indicators are lit as part of the power on self test, but the Neutral light is normally inhibited during this process if the shift lever switch is out of the neutral position.

Sorry.

  • 2 weeks later...
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3 hours ago, that guy from Canada said:

The system is lighting the neutral indicator as system check.

The neutral sensor is not working or bad wires, locate it either in shifter or on transmission and simply jump the switch connector to check light.

If light works sensor if light doesn't work, wiring or ground problem.

I wish it were that easy, but I don't believe you are correct.

If you look back through the thread, I asked if the gear indicator display on the speedo head was working correctly and he said that it was. This verifies that the proper signal is being received by the speedo head from the gearshift lever position switch. If you also look at the posted video, you clearly see the "N" for neutral being displayed even after the POST (power-on, self test) has completed. The fact that the light goes out after the POST with the "N" displayed points to a defect in the speedo head logic, rather than a grounding issue. I could be wrong, but that is where the diagnostic path takes us.

IMHO this really is a minor point, since the light is pretty much redundant. I have the same speedo on my TB550F and I rarely even notice it.

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