How To Fix Rain Sensing Wipers

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Rain-sensing windshield wipers have been a fairly recent development in automobiles. However, this excellent innovation that provides even more safety for drivers can present problems. Continue reading and learn how to fix rain sensing wipers.

Rain sensors automatically detect rain, snow or moisture on the windshield. They adjust the wiper speed based on the accumulation of water droplets on the window surface. This allows the vehicle owner a hands-off stance while driving through rain, fog and snow.

A sensor attached to the front windshield behind the rearview mirror works using an infrared light. The infrared light shoots a beam through the windshield at a 45-degree angle. Anything on the window that interrupts that beam triggers the sensor to activate the wipers.

8 Steps to Fix Rain-Sensing Windshield Wipers

Repair Rain Sensing Wipers
Repair Rain Sensing Wipers

The steps you need to take to troubleshoot a rain-sensing wiper are as follows:

  1. Place the vehicle in park or neutral with the emergency brake set. Use a spray bottle of window cleaner to soak the inside of the front window. Clean the window surface with towels, removing all stains, such as coffee, tobacco, any moisture and handprints.
  1. Clean the outside of the front window with glass cleaner and towels.. Removes all insect stains, bird droppings, oil film, mud or other debris. Clean the window until it is spotless. Go the extra mile around the location of the interior window mounted rain sensor in front of the rear view mirror.
  1. Use a magnifying glass to inspect the entire outer surface of the windshield.. Look for cracks, chips, nicks, or recent warping. Study the area where the rain sensor is located. There can be no cracks or chips in that place. If you find chips or cracks, particularly in the area above the sensor, you will need to repair the crack or replace the windshield. The infrared sensor beam will deflect from any cracks or chips and will not function properly.
  1. Look at the small box-shaped sensor on the inside of the windshield in front of the rear view mirror.. Make sure it hasn’t peeled off and is firmly attached to the window surface. If it sinks, it will cause misalignment with the infrared beam and give false information. If it’s loose and hanging, glue it back into position with a bit of window glue.
  1. raise the hood. Disconnect the negative battery cable with a wrench. Go to your vehicle’s windshield wiper control switch. Spray electrical contact cleaner on the seams of the switch and quickly turn the control on and off, or turn the knob dial. Clean the wiper contact on the switch”On/Off” on the rain sensor and activate the switch several times. Let the switches air dry.
  1. Reconnect the negative battery cable with a lug wrench. Use a spray bottle to wet the outer surface of the front windshield until you see thick droplets of water. Turn the ignition key to position “On“. Put the rain sensor switch in the position “On“. If the wipers do not move, consult the owner’s repair manual for the location of the rain sensor module.. It will be a small plastic box that receives the sensor wires. Most modules have locating brackets on the firewall inside the engine compartment.
  1. Take a test light and stick the sharp probe of the test light onto the red power wire that runs from the sensor to the module. The key must be on and the window wet. Look for the light from the test bulb to illuminate. If it doesn’t light up, check the connection of the wires on the module. The other two wires on the module will be a ground wire and a signal wire. Check the voltage of the signal cable with the test light. If it doesn’t come on, the wiring has a faulty cab wiper switch to module.
  1. Check the ground wire so you can make sure it is properly attached to a metal ground source. Remove the ground wire with a wrench or screwdriver and clean the connection with contact spray.

Finally retighten it with a wrench or screwdriver.

Advice

These were the steps to troubleshoot and fix a car’s rain sensing wipers, remember to follow the steps to the letter to avoid future inconveniences.

Rain-sensing windshield wipers have been a fairly recent development in automobiles. However, this excellent innovation that provides even more safety for drivers can present problems. Continue reading and learn how to fix rain sensing wipers.

Rain sensors automatically detect rain, snow or moisture on the windshield. They adjust the wiper speed based on the accumulation of water droplets on the window surface. This allows the vehicle owner a hands-off stance while driving through rain, fog and snow.

A sensor attached to the front windshield behind the rearview mirror works using an infrared light. The infrared light shoots a beam through the windshield at a 45-degree angle. Anything on the window that interrupts that beam triggers the sensor to activate the wipers.

8 Steps to Fix Rain-Sensing Windshield Wipers

Repair Rain Sensing Wipers
Repair Rain Sensing Wipers

The steps you need to take to troubleshoot a rain-sensing wiper are as follows:

  1. Place the vehicle in park or neutral with the emergency brake set. Use a spray bottle of window cleaner to soak the inside of the front window. Clean the window surface with towels, removing all stains, such as coffee, tobacco, any moisture and handprints.
  1. Clean the outside of the front window with glass cleaner and towels.. Removes all insect stains, bird droppings, oil film, mud or other debris. Clean the window until it is spotless. Go the extra mile around the location of the interior window mounted rain sensor in front of the rear view mirror.
  1. Use a magnifying glass to inspect the entire outer surface of the windshield.. Look for cracks, chips, nicks, or recent warping. Study the area where the rain sensor is located. There can be no cracks or chips in that place. If you find chips or cracks, particularly in the area above the sensor, you will need to repair the crack or replace the windshield. The infrared sensor beam will deflect from any cracks or chips and will not function properly.
  1. Look at the small box-shaped sensor on the inside of the windshield in front of the rear view mirror.. Make sure it hasn’t peeled off and is firmly attached to the window surface. If it sinks, it will cause misalignment with the infrared beam and give false information. If it’s loose and hanging, glue it back into position with a bit of window glue.
  1. raise the hood. Disconnect the negative battery cable with a wrench. Go to your vehicle’s windshield wiper control switch. Spray electrical contact cleaner on the seams of the switch and quickly turn the control on and off, or turn the knob dial. Clean the wiper contact on the switch”On/Off” on the rain sensor and activate the switch several times. Let the switches air dry.
  1. Reconnect the negative battery cable with a lug wrench. Use a spray bottle to wet the outer surface of the front windshield until you see thick droplets of water. Turn the ignition key to position “On“. Put the rain sensor switch in the position “On“. If the wipers do not move, consult the owner’s repair manual for the location of the rain sensor module.. It will be a small plastic box that receives the sensor wires. Most modules have locating brackets on the firewall inside the engine compartment.
  1. Take a test light and stick the sharp probe of the test light onto the red power wire that runs from the sensor to the module. The key must be on and the window wet. Look for the light from the test bulb to illuminate. If it doesn’t light up, check the connection of the wires on the module. The other two wires on the module will be a ground wire and a signal wire. Check the voltage of the signal cable with the test light. If it doesn’t come on, the wiring has a faulty cab wiper switch to module.
  1. Check the ground wire so you can make sure it is properly attached to a metal ground source. Remove the ground wire with a wrench or screwdriver and clean the connection with contact spray.

Finally retighten it with a wrench or screwdriver.

Advice

These were the steps to troubleshoot and fix a car’s rain sensing wipers, remember to follow the steps to the letter to avoid future inconveniences.

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