MS170 Chainsaw No Spark

[ShopperPEI]

Wondering what I should be checking on this. It's fairly new. No spark from the plug, but when I remove the ground wire from the ignition coil there is good spark. The wiring looks to be in good condition. Other than what is in the photo, are there hidden wires I should be checking?

 

[bertsmobile1]

Either switch is bad or the wire is shorting some where .

 

[ShopperPEI]

Either switch is bad or the wire is shorting some where .

Is there a way to test the switch?

 

[bertsmobile1]

Ohm Meter
infinite resistance in the on position
Ground in the off position

 

[Fish]

The switch is right there in the pic. If all of this is true, the black wire is grounding somewhere.