The coin meter is powered by +5v from connector 5 pin 1, white wire on power supply, connects to coin meter, then continues on white/yellow wire to J5 pin21 on the soundboard, the return to complete the circuit is through J5pin20 white/brown wire back to connector 5 pin 10. Make sure the path is completed when coining the game.
Board seperator plates
All notches facing up, furthest away from cabinet side sound board w/ components facing left, attached to plate, cpu board middle attached between plate 1 and 2 component side facing right, video board attached between plate 2 and 3 components facing left. Gas and steering powered by +5v from connector 5 pin 4 red/yellow wire to connector J2 pin16 on absolute pos board. Return ground from J2 pin 4 yellow/gray wire to connector 5 pin 3 ground. Test voltage and make sure pin 3 is connected to ground. Pots are possibley bad. Check pot resistance with meter.