hello i was given a shineray 250w atv. now the problem when i turn the key it blows the positive battery cable fuse. I have change out ignition switch, checked for frayed wires and cleaned all connections still as soon as i turn the key on the fuse blows please help cant seem to figure it out

 

Is there any possibility that you have wired the new ignition switch wrong? Usually ground and fused +12 volt wires are present on the ignition switch, and it can be easily miswired such that 12 volts shorts to ground when you turn on the switch.

If you're sure the ignition switch is wired right then take out the blown fuse. This disconnects the battery from the short you are trying to find. Connect an ohmmeter from the non battery side of the fuse to ground. From your description of the problem you should see very high resistance (greater than 1000 ohms) when the ignition switch is off, and very low resistance (less than 1 ohm) when the ignition switch is on.

Leave the ignition switch on and watch the ohmmeter while you start unplugging things one at a time. You will probably have to remove plastic, etcetera to get at all the connectors. When the meter changes from less than an ohm to a much higher value then you've zeroed in on where to look further.

If you unplug everything and it is still shorted it means that:
1) You have missed a connector somewhere.
2) Have a pinched wire in the wiring harness shorting it to ground
3) The ignition switch is where the short is.

Start with unplugging stuff. If you don't have a meter then buy one - they're not that expensive.

 

I found the connection that is causing the short it is a two wire connection in the front wiring harness area. all lights work and starter turns over the wires are a yellow-red and black connecting to yellow-red and green it appears to splice in several places so hard to narrow down what it goes to but bike will not start

 

Do you have spark?

Spark Plugs - Finding Spark Video - Reliable ATVs

 

no spark that connector does go to the sparkplug but many other places too you have been a great help and hope you can get me even further thank you so much

 

I'm a little confused. The connector you are referring to is the connector that blows the fuse? Did you mean it goes to the ignition coil? And this wire to the ignition coil goes elswhere?

Only one wire goes to the spark plug, and it is a big fat wire (thick insulation) with a rubber boot at the plug end.