Motor Will Not Operate In Any Switch Position

Fig. 4 Wiper motor terminal locations. All 1985-87 models:

Fig. 2 Two Speed Wiper Motor Terminal Locations:

1. Place wiper switch in low position and listen to hear if motor is running.
2. If motor is running, but output shaft is not rotating, motor is defective. If driveshaft is turning, check drive link to output shaft or linkage for proper connection.
3. Check wiper system fuse on 1988-89 front wheel drive models and Dakota, and replace if necessary. If fuse blows again, proceed to step 7. If fuse does not blow, continue with next step.
4. Connect voltmeter between wiper motor terminal L and ground, leaving electrical connector in place. Observe meter for several minutes to check circuit breaker, if equipped. If circuit breaker is cycling, proceed to step 7.
5. If meter indicates approximately 12 volts, the motor is defective.
6. If voltmeter indicates no voltage at motor terminal L, and fuse or circuit breaker is satisfactory, check continuity of wiper system wiring and wiper switch. Repair wiring or replace switch as needed.
7. If wiper system fuse is blown on 1988-89 front wheel drive models and 1988-89 Dakota, or if circuit breaker is cycling on all other models, disconnect electrical connector to wiper motor. On 1988 front wheel drive models install a suitable test circuit breaker across wiper system fuse terminals.
8. Check voltage at terminal L in electrical connector to wiper motor.
9. If circuit breaker continues to cycle, check for short circuit in wiper system wiring or defective switch.
10. If meter indicates approximately 12 volts in step 8, and circuit breaker does not cycle, check motor as follows:
a. Remove wiper arm assemblies.
b. Connect positive lead of ammeter to battery positive post, and connect negative lead to motor terminal L.
c. If motor operates and draws less than 6 amps, motor is satisfactory, recheck switch, wiring and circuit breaker.
d. If motor does not operate, or operates but draws more than 6 amps, disconnect ammeter and remove crank arm retainer and arm from motor.
e. Repeat step b. If motor operates and draws 3 amps or less, repair wiper linkage. If motor does not operate, or operates but draws more then 3 amps, motor is defective.