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Wiring diagrams Section: Wiper/washer Systems

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Wiper System/washer System: Diagnosis GMC Pickup C2500

Wiper/washer Systems 13 illustrations

TESTING

CAUTION

When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in the GENERAL INFORMATION section before disconnecting battery.

Note. Ensure WIPER fuse is okay before testing system. Front wiper switch connector is located near base of steering column.

Scheme 1

Scheme 1: FRONT - WASHER PUMP

Scheme 1: FRONT - WASHER PUMP

Scheme 2

Scheme 2: FRONT - WIPER/WASHER SWITCH TEST

Scheme 2: FRONT - WIPER/WASHER SWITCH TEST

Scheme 3

Scheme 3: FRONT - PUMP INOPERATIVE (WIPER MOTOR OPERATES)

Scheme 3: FRONT - PUMP INOPERATIVE (WIPER MOTOR OPERATES)

Scheme 4

Scheme 4: FRONT - WASHER PUMPS CONTINUOUSLY

Scheme 4: FRONT - WASHER PUMPS CONTINUOUSLY

Scheme 5

Scheme 5: FRONT - WIPER MOTOR INOPERATIVE (ALL MODES)

Scheme 5: FRONT - WIPER MOTOR INOPERATIVE (ALL MODES)

Scheme 6

Scheme 6: FRONT - "LO" SPEED ONLY, INOPERATIVE IN "HI"

Scheme 6: FRONT - "LO" SPEED ONLY, INOPERATIVE IN "HI"

Scheme 7

Scheme 7: FRONT - "HI" SPEED ONLY, INOPERATIVE IN "LO"

Scheme 7: FRONT - "HI" SPEED ONLY, INOPERATIVE IN "LO"

Scheme 8

Scheme 8: FRONT - ONE SPEED ONLY (RUNS THE SAME IN "LO" & "HI")

Scheme 8: FRONT - ONE SPEED ONLY (RUNS THE SAME IN "LO" & "HI")

Scheme 9

Scheme 9: FRONT - WIPER SHUTS OFF BUT BLADES DO NOT PARK

Scheme 9: FRONT - WIPER SHUTS OFF BUT BLADES DO NOT PARK

Scheme 10

Scheme 10: FRONT - WIPER WILL NOT SHUT OFF

Scheme 10: FRONT - WIPER WILL NOT SHUT OFF

Scheme 11

Scheme 11: FRONT - INTERMITTENT INOPERATIVE (WIPER HAS BOTH SPEEDS)

Scheme 11: FRONT - INTERMITTENT INOPERATIVE (WIPER HAS BOTH SPEEDS)

Scheme 12

Scheme 12: FRONT - WIPER MOTOR RUNS BUT BLADES DO NOT MOVE

Scheme 12: FRONT - WIPER MOTOR RUNS BUT BLADES DO NOT MOVE

Scheme 13

Scheme 13: FRONT - WIPER PARKS ABOVE NORMAL PARK POSITION

Scheme 13: FRONT - WIPER PARKS ABOVE NORMAL PARK POSITION