Neutral safety switch relay

Thank you hooligan for your reply. I should be more specific in my post.
When I turn on the Power Gear leveling system, the lights flash in a pattern that indicates that the trans in not in neutral (diesel) the system will not activate. Also I may have to turn the key several times before the starter will engage & start the engine. I was wondering if there may be a common reason for the two to not work & I was told to check the 'neutral safety switch'. It might be called something else. But I don't know where this switch/relay is located. Or else these are 2 separate problems that happened at the same time???

If you are looking for the "Neutral Start Back up" Switch (NSBU Switch) it is located on the passenger side of the Allison transmission.
-Passenger side of a rear engine diesel, driver side in p/u truck.