What should I do if my wiper relay is not working?
Failed relays are usually obvious, with burned and discolored contacts. Test the relay with a voltmeter. Turn the wipers on. The relay should “click” when energized. Follow the manufacturer’s guidelines for specific relay locations and test procedures. Inspect the remaining components: wiper arm, wiper blade and wiper transmission assembly.
How can I test my rear wiper motor?
Follow the manufacturer’s guidelines for switch removal and test procedure for each specific wire location and function. Test the rear wiper relay. Before reaching the wiper motor, the wiper switch sends power to a relay. This relay serves two purposes.
What happens if the intermittent wiper switch fails?
However, when one part malfunctions, it can cause potential safety concerns. One of the most common parts to fail is the intermittent wiper relay switch. The electronic relays that are installed in today’s cars, trucks and SUV’s have to operate in very hot and grueling conditions or are subject to constant abuse.
How does a rear windshield wiper relay work?
Test the rear wiper relay. Before reaching the wiper motor, the wiper switch sends power to a relay. This relay serves two purposes. It allows a small current signal from the switch to control a large current that powers the wiper. Designers can then use a small dash switch and wiring, keeping the instrument panel less cluttered.
How do you test a rear wiper relay?
Test for voltage to the switch. Move the switch through its functions and make sure there is voltage present at each plug location. Follow the manufacturer’s guidelines for switch removal and test procedure for each specific wire location and function. Test the rear wiper relay.
What happens when the intermittent wiper relay fails?
When all of the components involved in the windshield wiper blades work correctly, the system is very convenient. However, when one part malfunctions, it can cause potential safety concerns. One of the most common parts to fail is the intermittent wiper relay switch.
What should I do if my rear wiper is not working?
Probe the voltage supply plug with a voltmeter and make sure voltage and ground are present. Move the wiper function switch through all positions to determine proper voltage at the plug. If there is no voltage, check the voltage supply to the dash switch and check the rear wiper fuse. Remove the wiper switch from the instrument panel.
How can I tell if my wiper motor is suspect?
Make a fused power supply wire and ground wire. Apply direct voltage and make the motor run. If it runs and is not growling and noisy, it’s okay. Remove the wiper switch and inspect it. Test it for proper voltage supply. If it’s okay, then by process of elimination, the module is suspect.