G 3500 1 Ton Van V8-350 5.7L VIN L 4-bbl (1985)
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Fig. 14 Connections to operate round wiper motor independent of vehicle wiring
INTERMITTENT OPERATION
1.
Check solder connections at wiper terminal board.
2.
Connect wiper to operate in ``LO'' speed, Fig. 14. Connect ammeter (range 0---30 amps) in feed wire circuit to wiper and observe current draw.
Allow motor to run until it becomes hot. Current draw should be 3.5---4.0 amps. If not within specifications, motor is defective.