What type of horn is fitted to your tow tractor?

BT use SKF encoder bearings on the older Reflex reach trucks & they had to fit a supressor on the horn circuit as electrical spikes could blow 1 of the motor / height counter sensor bearings.

2 pin horns the suppressor was piggy backed, later trucks used a 3 pin horn with built in supressor.

We where told if a encoder bearing was ever replaced then the horn / supressor must be replaced to & recorded on job sheet else they wouldnt warranty the part if it failed again.