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Current Draw Test

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To check current draw in the top operating circuit, disconnect black wire at circuit breaker (located at starter relay), and connect an ammeter in series in the circuit. Operate top and note readings. Current draw should be 28 Amps, while operating, and 40-50 Amps, stalled. The voltage reading should be 12.3 volts.

Fig 1: TOP ACTUATOR GEAR REDUCTION UNIT
G09321476Courtesy of GENERAL MOTORS COMPANY