Customer Can't SHUT OFF the Engine? ('85 Jeep CJ-7 Renegade)

This is one customer complaint that you don't see every day...
Usually, the issue is the car won't start or run...
But this old Jeep refuses to SHUT OFF!! What the heck??

The '85 Jeep has an aftermarket Holly Sniper EFI system installed, so that's definitely a variable.

Let's see if we can address the customer complaint by thinking outside of the box :)

AMAZING TEST LIGHT:
www.amazon.com/dp/B000M5ZWBA?linkCode=ssc&tag=onam…

ASTRO DVOM:
www.amazon.com/dp/B07FDBW1PT?linkCode=ssc&tag=onam…

ASTRO AMP CLAMP:
www.amazon.com/dp/B08MTCMWLB?linkCode=ssc&tag=onam…

TS100 SOLDERING IRON:
www.amazon.com/dp/B07SQDZ9SV?linkCode=ssc&tag=onam…

Enjoy!
Ivan