Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step tests for continuity through the 390 ohms resistor in the windshield wiper/washer switch.
-
This step tests for continuity through the delay resistors in the windshield wiper/washer switch. The measured resistance will change in sequence from low to high as the delay speed is increased.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views | ||||||||||
1 | Did you perform the Wiper/Washer System Description and Operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||
2 |
Does the system operate normally in every mode? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||
3 | Do the windshield wipers operate in the high speed mode? | -- | Go to Step 5 | Go to Step 4 | ||||||
4 |
Do the windshield wipers operate at high speed? | -- | Go to Step 8 | Go to Step 7 | ||||||
Is the resistance near the specified value in the listed switch positions? | 390 ohms | Go to Step 6 | Go to Step 10 | |||||||
Does the resistance remain within the specified values from low to high as the delay speed is increased? | 1000 ohms-10K ohms | Go to Step 14 | Go to Step 12 | |||||||
7 | Test the windshield wiper switch high signal circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 14 | ||||||
8 | Test the wiper switch ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 9 | ||||||
9 | Test the windshield wiper switch high signal and ground circuits in the steering column harness for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 12 | ||||||
10 | Test the windshield wiper switch voltage supply circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 11 | ||||||
11 | Test the windshield wiper switch signal 1 circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 12 | ||||||
12 | Inspect for poor connections at the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 13 | ||||||
13 | Replace the windshield wiper/washer switch. Refer to Headlamp Switch Replacement in Lighting Systems. Is the repair complete? | -- | Go to Step 16 | -- | ||||||
14 | Inspect for poor connections at the windshield wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 15 | ||||||
15 | Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement . Is the repair complete? | -- | Go to Step 16 | -- | ||||||
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||
