100 enter 1 enter,will show the wash status. At the end of the wash it will go to "wait wheel well" then to "wait eyes clear". You will need to see where it is hanging up. You either have a an issue with your back up loading eyes(or tradle switch ,if you have floor steel), or you have a problem with a t bar eye(most likely front)
Moving on
I would try changing the sheer pin first(arm my be blocking the front eyes).
Next check your " back up loading eyes"( you could wash your car and roll ahead ,and make sure the back up sign comes on.
Next you may need to check the t bar eyes (just look it up under laser faults in your manual under front or rear eyes fail to see the way to test your eyes).
Good luck..