Beretta V6-173 2.8L (1989)
Fig. 17 Connections To Operate Compound Wound Round Wiper Motor Independent Of Vehicle Wiring
Wiper Recycles
Crank arm oscillates in a somewhat horizontal plane and is accompanied by a loud knock with each revolution of the gear.
1.
Check that drive pawl and relay latch arm springs are properly connected, Fig. 18.
2.
Check wiper for LO speed operation, Fig. 17. If wiper has HI speed only, check the following items:
a. Solder joint at No. 3 wiper terminal.
b. Splice joint-field coil crossover splice.
c. Splice joint-black lead to field coil.
3.
Check relay switch and terminal board as follows:
a. Remove washer pump assembly to get at black with pink stripe wire. Ground 12 volt test lamp to wiper housing and probe (penetrate
insulation) black with pink stripe wire with 12 volt tester.
b. Connect positive side of power source to terminal No. 2 and negative side to motor case. Install jumper wire from terminal No. 1 to motor
case. Observe if test light goes out once for each revolution of gear or if light glows steadily. If light glows steadily, relay switch contacts are
not opening and switch is defective. If light goes out each time drive pawl moves into relay switch slot, relay switch is functioning correctly.
Wiper Has One Speed, LO
1.
Check for grounded condition in the internal black lead that connects to wiper terminal No. 3.
2.
Disassemble motor section of wiper and check for grounded shunt field coil.
Wiper Has Excessive Speed In Hi But LO Speed Is Normal
Fig. 19 Gearbox Relay Terminal Board Resistor
1.
Check for open 20 ohm resistor and the resistor ground connection, Fig. 19.
Intermittent Operation
