1999 Mustang 2050 Safety Lockout, Intermittent

Howdy. Have searched this forum a LOT looking for ways to troubleshoot this problem of foot pedals locking up. This has gone on for years and I have been unable to find what causes it, nor have I found many answers online. It seems to be a common problem, but not so common are answers!!!
I find that replacing the ECM to the newer version with LED lights might be a path to determine which circuit is causing the lockout. Most of the time I can stop and start engine a few times, mess with the...

1999 Mustang 2050 Safety Lockout, Intermittent

1999 Mustang 2050 Safety Lockout, Intermittent