11921  Slauson Ave.    Santa  Fe  Springs,  CA.    90670    (800)  227-4116    FAX (888)  771-7713
40
TROUBLESHOOTING
MOTOR WILL NOT RUN
2. Touch a jumper wire to terminals B & D (FIG. 40-1). If 
motor runs, check control switch, the switch connections, 
and white wire. Check and correct wiring connections or 
replace the control switch.
3. Touch heavy jumper cables to terminals A & B 
  (FIG. 40-1). 
  a. If motor runs, replace the starter solenoid.
  b. If motor does not run, repair or replace the pump motor.
1. Connect voltmeter between 
starter solenoid terminal B and 
ground connection on pump 
(FIG. 40-1). Verify that full bat-
tery voltage is at B. Recharge the 
batteries if voltmeter indicates 
less than 12.6 volts DC, or 25.2 
volts DC for a 24 volt system.
GRAVITY DOWN POWER UNIT
FIG. 40-1
TERMINAL A
LOAD
STARTER 
SOLENOID
GROUND 
CONNECTION
TERMINAL B
BATTERY (+)
TERMINAL C
GROUND (-)
VALVE S1 
TERMINAL D
SWITCHED 
BATTERY (+)