Znen ZN250T-D Running Rough + Headlights

Shadowfire · 07-03-2016, 07:08 PM

Ok. IF that diagram is correct for your bike(*), then the wire of interest is the BLUE one which runs from the high/low beam switch, to the front panel and to the headlights.

Check at the connector where the blue wire enters the switch. You should be getting 12-14VDC between the BLUE wire (high beam) and GROUND when the high beams are on. This diagram indicates that ground should be a green colored wire (and IIRC it was green on my YY250T). One of the wires to the horn switch should be ground; also, if you have exposed metal on the bike's main frame, that will also be ground; or (preferred) you can probe the battery (-) terminal for ground.

If you get 12-14V when the switch is on, then the problem must be a break somewhere along that blue wire (remember, connectors are the most likely culprit, followed by severed wires). If you don't, then its time to replace the switch. If you correctly bypassed the switch in your earlier tests, then it is an issue with a break in that blue wire. Since your low beams work (and they share the same ground as the high beams), ground to the headlights must be OK. It's highly unlikely that both the high beam elements, and the panel high beam indicators, are defective, so I'm gonna go with "break somewhere in the blue wire between the switch and the first device it goes to" as the most likely problem.

(*) there is no way to know for sure, since the bike is typically wired by the OEM's, not CFMOTO, and they may not use the same wire colors (in fact, they may not wire it exactly the same).

07-03-2016, 07:08 PM	#7
Shadowfire Join Date: Feb 2015 Posts: 121	Ok. IF that diagram is correct for your bike(), then the wire of interest is the BLUE one which runs from the high/low beam switch, to the front panel and to the headlights. Check at the connector where the blue wire enters the switch. You should be getting 12-14VDC between the BLUE wire (high beam) and GROUND when the high beams are on. This diagram indicates that ground should be a green colored wire (and IIRC it was green on my YY250T). One of the wires to the horn switch should be ground; also, if you have exposed metal on the bike's main frame, that will also be ground; or (preferred) you can probe the battery (-) terminal for ground. If you get 12-14V when the switch is on, then the problem must be a break somewhere along that blue wire (remember, connectors are the most likely culprit, followed by severed wires). If you don't, then its time to replace the switch. If you correctly bypassed the switch in your earlier tests, then it is an issue with a break in that blue wire. Since your low beams work (and they share the same ground as the high beams), ground to the headlights must be OK. It's highly unlikely that both the high beam elements, and the panel high beam indicators, are defective, so I'm gonna go with "break somewhere in the blue wire between the switch and the first device it goes to" as the most likely problem. () there is no way to know for sure, since the bike is typically wired by the OEM's, not CFMOTO, and they may not use the same wire colors (in fact, they may not wire it exactly the same).
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