Loosen the two setscrews (1)
holding each knob (2) and remove
the knobs. Remove nut (3), and
lockwasher (4). Remove variable
resistor (5) and ground wire (6).
Unsolder jumper (7) from terminal
(8) and variable resistor (9).
Remove nut (10), lockwasher (11)
and variable resistor (9). Unsolder
resistor (12) from variable resistor
(5). Unsolder resistor (13) from
Variable Resistor (5)
variable resistor (9).
Ground Wire (6)
screw (14) and terminal (8).
Variable Resistor (9)
Clean dirt and grime from all
threads. Remove silicone (RTV)
in switch cover plate (15).
Cover Plate (15)
Wiring insulation must be free of
signs of wear, cuts, or burns. The
variable resistors should turn
smoothly throughout their range.
Threaded components should be
free of burrs and evidence of cross
Repair is limited to
replacement of missing, defective,
or damaged parts.