Genie S60 1995 Ford LRG425I start problems

Genie S60 Ford LRG 425 I starter unreliable. suspect start module. Get starter input #3, starter drops out, starter output #1 light goes out. Installed new start module, no help. What is the function of the start module? Sometimes starter will hit for a second or two then drop out. Sometimes nothing happens. Once in a while, it starts

Genie S60 1995 Ford LRG425I start problems