Yamaha Golf Cart Has No spark - CDI Help!


New Member
I'm trying to troubleshoot my Yamaha G1 which died yesterday. It has no spark at the plug when I turn it over. There is no voltage in the orange wire which is going into the ignition coil, so I don't think the coil is the problem. This orange wire comes from the CDI unit, which I'm not sure what that is. I'm assuming it regulates the spark and I know it is expensive (over $300). So how can I verify that the CDI unit is working? There is voltage coming out of the magneto's brown wire, which goes into the CDI unit.

Thanks ahead,


New Member
The test is rather complicated and requires a magnetic pickup, wave form generator and 2 input oscillascope. Usually the coil is bad or one of the connections on the CDI. Check all with an ohm meter