Hi,
Above forklift presents with no drive, parking brake indicator light on with brake on or off (switch and wiring verified good) and code 4 on throttle tip-in in either direction. With key on and handbrake released, picked up the counterweight with another lift truck and towed to maintenance area backwards, this forklift's reverse lamps and back-up alarm come on whenever I towed it backwards, and go out when I stop. Let the truck down and hop on it to see if it moves, magically the parking brake light is out and the truck moves. Operator was complaining of the parking brake indicator sticking on and the drive lurching.

This truck has non-marking tires and the static strap is missing. Is the controller blown from ESD? Truck has Danaher controller and AC traction motor only. Lift is DC and is unaffected through all of this. Thanks for any help, customer is in high pressure environment and needs this truck running reliably as soon as possible. Will be installing strap or chain immediately, but has permanent damage been done? I do not have software or cable to connect to the AC drive trucks (help).