Rear right switch:

SWITCH POSITION TERMINAL CHART

Switch position	Terminal No.	Standard
UP	13 and 16, 15 and 5	less than 1ohm
OFF	16 and 15 16 and 5 5 and 15	less than 1ohm
DOWN	13 and 15, 16 and 5	less than 1ohm

If NG, replace the main switch.