Intermittent Wiper System
To diagnose system malfunctions that do not involve the delay function, refer to "Two-Speed Wiper System."
Fig. 4 Wiper motor terminal locations. All 1985-87 models:
Fig. 5 Intermittent wiper control 8 cavity connector:
1985-87 Models
1. Place wiper switch in low position, then disconnect 8 cavity electrical connector from intermittent wipe control unit and inspect contacts for damage.
2. Connect suitable test lamp between cavities 1 and 3 of the electrical connector. Test lamp should light once per wipe cycle.
3. If test lamp lights as specified, proceed to step 4. If there is periodic flashing, the control unit is defective and should be replaced.
4. Check for periodic test lamp flashing between motor terminals P1 and P2. If periodic flashing is present, check system wiring.
Fig. 5 Intermittent wiper control 8 cavity connector:
WIPERS DO NOT OPERATE WHEN SWITCH IS IN DELAY POSITION
1. Disconnect wire connector from intermittent wiper control unit.
2. Place wiper switch in maximum delay position.
3. Connect volt meter between cavity 4 and cavity 6 on wire connector.
4. If volt meter reading is zero, check wiper switch and wiring.
5. If volt meter reading is 10 to 15 volts, control unit is faulty and should be replaced.
WIPERS IMMEDIATELY GIVE FIRST WIPE, BUT DO NOT OPERATE WITH SWITCH IN DELAY MODE
1. Disconnect wire connect from intermittent control unit and check for bent contacts.
2. Place panel wiper switch in maximum delay position.
3. Connect a volt meter between cavity 4 and cavity 8 on wire connector.
4. If volt meter reading is zero, check wiper switch and wiring.
5. If volt meter reading is 10 to 15 volts, control unit is faulty and should be replaced.
EXCESSIVE DELAY OR INADEQUATE VARIATION IN DELAY
1. Variations in delay should be as follows:
a. Minimum delay, delay control to extreme right position before first detent, one half to two seconds.
b. Maximum delay, delay control to extreme left position before off detent, ten to thirty seconds.
2. If there is excessive delay or no variations in delay, replace wiper switch.
Fig. 5 Intermittent wiper control 8 cavity connector:
WIPERS DO NOT RUN CONTINUALLY WHEN WASHER CONTROL IS OPERATED DURING DELAY MODE
1. Disconnect wire connector from intermittent control unit.
2. Connect a volt meter between cavity 4 and cavity 7 on wire connector.
3. Depress washer switch, if volt meter reading is zero, check switch and wiring.
4. If voltage reading is 10 to 15 volts, control unit is faulty and should be replaced.
WIPERS CONTINUALLY RUN WHEN WASHER IS OPERATED BUT DO NOT PROVIDE AN EXTRA WIPE WHEN WASHER CONTROL IS RELEASED
1. If this condition is encountered, replace the control unit.
WIPER SWITCH TESTING
1. On models with an instrument panel switch, remove switch to gain access to terminals.
2. On models with a column mounted switch, disconnect electrical connector to switch at body wiring harness connector.
3. Operate switch in all positions, and check continuity between terminals with an ohmmeter. On instrument panel mounted switches, ground is the switch body.
4. If continuity is not as specified in charts, replace switch.
Two Speed Wiper Switch Continuity Chart
1982 front wheel drive models
1985-87 rear wheel drive models
Intermittent wiper switch continuity chart
1982-84 front wheel drive models
1985-87 rear wheel drive models