Pontiac Fiero 1988 Service Manual page 1237

8E2-12 WINDSHIELD WIPER SYSTEMS
CONDITION NO. 7
INTERMITTENT WIPER OPERATION. BLADES STOP AT RANDOM
POSITIONS ON WINDSHIELD WHEN WIPER SWITCH IS IN LOW OR
HIGH SPEED POSITION
PULSE WIPER ONLY — REMOVE MODULE, CONNECT
FRONT AND REAR MODULE CONNECTORS. CHECK WIPER
SYSTEM, IF OK, REPLACE MODULE, IF NOT OK, GO TO NEXT
STEP.
REMOVE WIPER FUSE FROM FUSE BLOCK AND CONNECT AN
AMMETER (0-30 AMPS) ACROSS FUSE BLOCK TERMINALS.
OPERATE WIPERS IN HIGH SPEED WITH WINDSHIELD DRY.
CURRENT DRAW WILL FLUCTUATE.
CURRENT DRAW BELOW
5.0 AMPS
CURRENT DRAW
CEEDS 5.0 AMPS
EX-
REPLACE WIPER MOTOR
REMOVE WIPER ARMS AND BLADES AND
REPEAT TEST
CURRENT DRAW
STILL EXCEEDS 5.0
AMPS
CURRENT DRAW O.K.
DISCONNECT WIPER LINKAGE
FROM MOTOR CRANK ARM AND
REPEAT TEST
REPLACE WIPER BLADE
ELEMENTS AND REPEAT
TEST
CURRENT DRAW STILL
EXCEEDS 5.0 A M P S
CURRENT DRAW O.K.
I
I
REPLACE WIPER M O T O R . WIPER T R A N S M I S S I O N
LINKAGE BINDING, REPAIR
OR REPLACE AS REQUIRED
CURREN1 " DRAW O.K.
PROBLEM CORRECTED
G4Q017-SE2J
Fig. 1 6 Windshield Wiper Diagnosis Chart - Condition 7