(8) Place AC-OFF-DC switch in AC position.
(9) Check operation of voltage regulator for regulation from 0 to 30
volts as indicated on VOLTMETER. Set for 6-, 12-, or 24-volt indication.
(10) Make sure test set fuel tank is empty or pipe plug is sealing fuel
outlet at left rear of test set top.
(11) Place test set switch A in HI position and then in LO position.
Test set fuel pump should operate when switch is in either position.
OS 010, 8-P12