K 30 P/U 4WD V6-262 4.3L (1985)
Wiper Will Not Shut Off
1.
Disconnect wires from wiper motor terminals 4 and 5, Fig. 9, with ignition switch On and wiper switch in off position. If wiper stops operating,
motor is defective. If wiper continues to run, proceed to step 2.
2.
Disconnect wires from wiper motor terminals 1, 2 and 3 and apply battery voltage to terminal No. 1. If wiper does not operate, check wires
between motor terminals 2 and 3 and switch and repair as necessary. If motor continues to operate, motor is defective.
Wiper Operates Intermittently
1.
Remove wiper fuse and connect ammeter across fuse block terminals.
2.
Turn ignition switch On, then operate wiper at high speed with windshield dry, noting the lowest current draw reading.
3.
If current draw is less than 5 amps, motor is defective. If current draw is greater than 5 amps, remove wiper arms and blades, then repeat steps 1
and 2 and proceed to step 4.
4.
If current draw is now satisfactory, replace wiper blade elements. If current draw is still high, proceed to step 5.
5.
Disconnect wiper linkage from wiper crank arm and repeat steps 1 and 2. If current draw is now satisfactory, check wiper linkage for binding and
repair or replace as necessary. If current draw remains high, motor is defective.
Motor Operates But Wiper Blades Do Not
1.
Check that wiper linkage is connected to crank arm.
2.
If linkage is connected, a stripped wiper gear is indicated and the motor must be replaced.
3.
If linkage is disconnected, reconnect to crank arm and check system.
