powerloss wts light issues

[1995blackbeast]

ok i have a 1995 f350 7.3 turbo diesel manual that is acting kinda weird.
i have my truck plugged in for most of the time. I go out and start it about 20 mins before i get on my way. the warm up cycle is done by the time i drive. now when i go it it fine until i hit a big bump and the gp light pops on drops to idel til i let of the go pedal and push it again and its fine. it is starting to drive me insane. now if it is a full operating temp and i shut the truck off for a half hr, hr start it up and it wont do it again until it is dead cold again. please help

[Patrick Feeley]

Usually if the WTS light is coming on, power has been interrupted to the PCM. When mine did this it was due to the ignition switch. Cheers!