Exalto 255BS - Exalto Wiper System Troubleshooting; 6.1 Wiper Fails to Operate; 6.2 Incorrect Wiped Area or Park Position

6. Troubleshooting
In this chapter, several malfunctions are mentioned combined with possible causes
and solutions. Please leave servicing to qualied mechanics.
6.1 Wiper does not work aer switching on
• Possible causes:
1. Wiper switch is not working properly.
Solution: Test and replace it. Check if the current is (and keeps being) too high.
2. Burned or incorrectly sized fuse.
Solution: Test and replace it. Check if the current is (and keeps being) too high.
3. Electrical connections are wired incorrectly or might be damaged.
Solution: Measure the voltage across the motor and check all connections are correct.
4. The wiper motor has failed.
Solution: Replace the motor and check for excessive drag or high current.
6.2 Wiped area or park position is not correct
• Possible causes:
1. The wiper arm was placed without parking the motor rst.
Solution: Remove the wiper arm. Run the motor to the park position and re-install the
arm.
2. The wipe arc is set wrong or has changed due to high loads (e.g. spring pressure of
arms too high, excessive drag).
Solution: Determine the wiping arc if needed (see paragraph 5.4) and set the wiping arc
again (see paragraph 5.3).
3. The wires are connected incorrectly.
Solution: Check and reconnect the wiring (see the scheme in paragraph 3.3).
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MANUAL WIPER SYSTEMS