If bypassing the lanyard doesn't solve this issue, you will need to follow the path of the dreaded purple wire and inspect, clean and apply dielectric grease to all connectors this passes through. A little corrosion at a connector has the potential to open the circuit in the same way as the tether switch can.
CUSTOM WHEEL & TIRE PACKAGES
$99 LED LIGHT PACKAGE - FREE SHIPPING
REBUILDING HOLLEY MARINE CARBURETORS - $235 DELIVERED
Email - firstname.lastname@example.org