2011 FLHTLN (Ultra) (Delphi)
Zap strapped wiring to under side left of gas tank to try and replicate plug wire issues. No problems unless I zap strapped cable directly to plug wire.
Routed wires around coil area to see if same problem existed. Same situation... frozen after first few feet of ride.
Routed under seat near battery no issues.
As long as you don't route wiring near plug wires and coil all is good.