I've just gotten a chinese 150cc automatic quad that had some eletrical problems, I managed to find the error and start it and while doing so I found that the wire harness was beyond repair and because of that I'm planning on making a new one and I've used the old one as a template.

I'm hoping the people here could check it and see if they can spot any obvious errors, it's going to be very simple with one switch for the ignition and a button for the starter.

Here it is:


The pink wire was there, but afaik it should be removed as any charge to the battery should come from the regulator.

 

New and simplified harness:

 

New and simplified diagram is waiting for moderator approval before being posted.

Today I've soldered and done most of the connects for the new harness, it's basically just to put it back together and test it so would appreciate input.


A few questions:
I also have a quick question regarding the starter solenoid, googling the wiring I see that people put the switch to start on the positive while tracing my old harness I believe it was on the negative, is there any difference to this?
And I'm planning to put the wiring, the cdi and the rectifier beneath the saddle, is there any downside to this as in not enought cooling or would it not be any problem? It's not hermetically sealed.

 

Your diagram doesn't look right to me. I don't do a lot with DC CDIs but have never seen a Quad with a direct wire from battery positive to stator and another to a voltage regulator. This may be right, but is unusual.

 

In the updatet diagram I have removed the wire from the stator to the battery. Perhaps the regulator is bad and former owner tried charging straight from the stator.

 

The stator would have been feeding AC to the battery with that pink wire. Diagram 2 makes more sense but the part marked "trigger pulse" and it's wires don't. The trigger coil is in the stator and feeds the blue yellow wire, which should (and does) go to the CDI.

If the ignition switch is on the negative, I would stick with that, just in case this is important to your CDI. However, did it not feed power to the lights, horn, starter switch?

 

Bad wording there as english is my third language. The trigger pulse is actually the start button to the solenoid, the button is now changed to the ground wire and the positive is fed from the ignition switch.
My bad wording made you think I meant the trigger pulse to the CDI I assume.

You're correct as the ignition is positive, however the button to the starter was on the negative.

 

Your second diagram should be OK then. The negative side switch for a starter is quite common, as is a negative side switch for a horn. Makers use whichever is easiest.

 

That feeling when connecting it all up and getting a spark and having the quad fire up after a few turns.

The back brake caliper was destroyed so I removed it, together with the handle and the start/light buttons on the handle and all that is left is the speed/front brake on the left side.
This made it easy to remove all the wiring and just have a push button to start and a switch for ignition placed beneath the saddle.

 

Final diagram that I used, posting it here so someone else can benefit from it if doing something similar.