JCL MP250A Electrical No Brake, Signal Lights Won't TurnOver By bob123456789 (Read 1,040 times)

[bob123456789]

I have a JCL MP250A with a Linhai 257 cc engine that is very similar to the Roketa, Linhai..... 

I am in the middle of doing some work and am baffled where I am right now.  I just worked around the cylinder and exhaust valve cover and now when I turn the engine over nothing happens.  The key is on, I am holding the brake lever (neither right or left works).  I have power to the digital clock.  I get no power to any lights (brake, tail, signal or to the dashboard back lights).  No clicking of the solenoid when I press the starter button or turning of the starter.   No  horn.  My battery is brand new and fully charged.  I have 13.0 volts across the battery terminals.  Both the fuse on the solenoid and the fuse on the battery are good.  I have checked the continuity of the ground from the negative terminal to the frame and engine and they are good.

I seem to remember it has safety wiring that won't let it turn over when the rear brake light doesn't work.  I have a multimeter but no wiring diagram.

Clearly it is something I did while I worked on it.  It worked before then.  I have checked it over a lot and I don't see what the problem is.  I have looked for wiring that  I might have moved or disconnected while working on it and can't see anything .

Can anyone point me in the right direction.  Any ideas how I can fix it?

Thanks.

[cyborg]

If the brake Filament in the bulb its a no start

[cyborg]

Also if the engine isn’t grounded it’ll create a no start situation also,,, but the lights will work,,, I think you popped a fuse or rear bulb

[bob123456789]

Thanks Cyborg. We are on the right track, just not quite there yet

It has two brake/tail lights. I pulled them and one had a broken filament. I replaced the one with the broken filament. When I went to start it still nothing. I really can't tell if the filament is burnt or broken. If it was burnt out by a electricity spike it would make sense to keep looking for another similar cause stopping the engine from turning over. Does anyone know if there are more things wired like the brake lights that can stop the engine from turning over?

If it wasn't burnt then it might be something near where I was working around the cylinder when it quit.

I still get no signal lights, brake or tail lights or dash lights but there is power to the clock.

Any help figuring this out would be greatly appreciated.

[bob123456789]

Okay I went back and put power to the old original brake/tail bulbs. All of them lit up correctly. I have put both the original bulbs back in.

Cyborg I had checked the engine ground back to the negative terminal and had continuity.

Any ideas how I can get it to turn over again would be really appreciated.

Cyborg? Anyone?