windshield wiper

[maxtor]

I start up my M923a2, wait until air pressure light is out, put the truck into reverse, and back up about 50 ft. Then put it in drive and then the right windshield wiper cycles twice. Scares the heck out of my first time passengers. This happens every time. Anyone know why?

 

[wreckerman893]

Grimlins. A lot of them do that and there is no good answer. Deuces do it to......my uneducated guess is that when the air system charges up it sends air through the system causing the wipers to cycle.

 

[Csm Davis]

Yeah a lot of times that's how I can tell if a truck has enough air pressure to move. But sometimes it spooks me too.