E99 F350 electrical "hiccup" including brakes?

[Garbage_Mechanic]

Have a good friend, pretty mechanically savvy guy, who called me about a strange issue today. Truck is an early 99 F350 7.3 / auto. It has an Edge programmer installed by former owner. He hasn't had it long but plowed with it quite a bit this winter, no problems.
Here is the scenario: Normal day, nothing going on. Backs out of parking space, pulls into the street, goes about 300 feet, notices it seems like the trans is slipping. Gives the column shift lever a jiggle, thinking it isn't all the way in gear properly. Trans seems to straighten out. Continues down the street a couple hundred feet, someone cuts him off and he stabs the brakes. (important nugget, LF ABS wire has been spliced / patched by former owner and so far not available seperatly, ABS light is on) When he hit the brake, the truck dived hard left and had poor stopping like only the LF brake worked. Brakes seemed to return to normal. Next time he looked down at the dash, the ABS light was OFF and his Edge programmer display had gone to a blue glow. No display. Truck seemed to run and drive normal. Unplugging and re plugging the Edge display brought it back on line.

Anybody got any ideas????

 

[Garbage_Mechanic]

WOW 40 views and no ideas ??????

 

[POWER-STRUCK]

What's the question?

Otherwise get a soldering iron, ohm meter, heat shrink, wiring diagrams and get used to repairs often on a snow plow truck.

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[Garbage_Mechanic]

What's the question?

Otherwise get a soldering iron, ohm meter, heat shrink, wiring diagrams and get used to repairs often on a snow plow truck.

sent using tapatalk

Ok maybe I had that coming but it didn't help any.

Doesn't anyone think it is strange to have an electrical issue that caused a loss of braking?
Will a disconnected ABS sensor cause lack of braking?
He only plowed snow maybe 10 days with this truck since he got it. But is has been a Northwest Montana truck it whole life.
I get it on the electrical repairs, I maintain 2 fleets of garbage trucks that drive through mag chloride all winter. It is amazing how a wire can turn into green powder in the middle of an area un disturbed by human hands!