Working on a Cherokee Shuffle Alley. The nine rear rollover switches will not activate the 1st and 2nd ball relays like it is suppose too. I've checked continuity from the switches under the playfield to the Rear Roll Over Relay. Everything is good to this point. This relay should trip the 1st and 2nd relays. The Rear Roll Over Relay will trip when tested with a nine volt battery. So I am thinking it has to be something other than the relay. Any ideas of what other switches or relays I should be looking at?