Circuit Tests

Do not move wiper arms from side to side manually with linkage connected to motor, as motor and/or park mechanism will be damaged.
1. Check power input as follows:
a. Remove circuit breaker.
b. Check battery side of circuit breaker for voltage.
c. If battery voltage is not measured, repair open to circuit breaker.
d. If battery voltage is measured, measure resistance between circuit breaker terminals.
e. If resistance is measured, replace circuit breaker.
2. On models less intermittent wipers, check the ground circuit as follows:
a. Disconnect wiper switch connector A.
b. Using an ohmmeter, check terminal G to ground.
c. If resistance is measured, repair open to ground.
3. On models with intermittent wipers, proceed as follows:
a. Place ignition switch in Accessory position.
b. Remove intermittent wiper/delay module, then plug module connector together.
c. If the wipers operate in Lo, Hi and Mist modes, replace the intermittent module.
d. If wipers do not operate in Lo, Hi and Mist modes, proceed to next step.
4. On models less intermittent wipers, check the wiper/washer switch, with the ignition switch in Run position as follows:
a. Check wiper switch connector A, terminal E for battery voltage, with the wiper switch in Lo and Mist/intermittent position.
b. If battery voltage is not measured replace the switch.
c. If battery voltage is measured, check wiper switch connector A, terminal C for battery voltage with switch in Hi position.
d. If battery voltage is not measured, replace switch.
e. If battery voltage is measured, check wiper switch connector A , F terminal while switching to Off position.
f. Battery voltage should be measured until wipers return to park position, then zero volts. If not, replace switch.
5. On models with intermittent wipers, proceed as follows:
a. Disconnect intermittent wiper module connector B.
b. Check resistance between terminals A and D while rotating switch from minimum to maximum delay.
c. Resistance should measure 0-500 K ohms. If not, replace the switch.
d. If resistance is as specified, measure resistance between terminals A and G while rotating switch from minimum to maximum delay.
e. If resistance measures 0-500 K ohms, replace wiper module. If resistance does not measure, replace the switch.
6. On all models, probe connector D with ignition switch in Accessory position. Check resistance at terminal 1.
7. If 0 ohms are not measured, repair open to ground.
8. If 0 ohms are measured, check terminal 4 for battery voltage with switch in any position.
9. If battery voltage is not measured, repair open from fuse panel.
10. If battery voltage is measured, replace wiper motor.
11. Check terminal 2 for battery voltage with switch in Lo or Hi position. If battery voltage is not measured, repair open from wiper switch.
12. If battery voltage is measured, replace wiper motor.
13. Check terminal 5 running, then turn switch to Off.
14. If battery voltage is measured until wipers return to park position, then 0 volts replace wiper motor.
15. If battery voltage is not measured as specified, repair open from wiper switch.