Diagnosis And Testing - Washer Nozzle Heater

The Positive Temperature Coefficient (PTC) thermistor type heating element of the washer nozzle may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information.

1. Disconnect the wire harness connector from the washer nozzle pigtail harness, but it is not necessary to remove the washer nozzle from the hood inner reinforcement for testing. Refer to NOZZLE, WASHER, REMOVAL .
2. Using an ohmmeter, test the resistance between the terminals of the washer nozzle pigtail wire connector. At an ambient temperature of 21°C (70°F) the resistance values should be between 24 and 50 ohms.
3. If the thermistor fails the resistance test, replace the ineffective washer nozzle as required. If the thermistor tests okay, be certain to check for a short or open in the wire harness between the washer nozzle and the rear window defogger relay in the rear Power Distribution Center (PDC).