-99 means that the service reminder interval has been tripped. With a GE Handset, set Functions 19 and 20 both to a value of 255 if you want to eliminate the service reminder. Then -99 will not appear again. On the reach truck, -01 will appear when brake "deadman" pedal is up.
-01 on the ECG, Park Brake switch open. Or Seat Switch open (if equipped), Slide in Battery retainer interlock switch open (if equipped).
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.