Sensor wipes for no
reason
False wipes should be rare.
Sometimes the Rain Tracker will see the first droplets of water before the driver notices.
On very hot, humid days, water can drip down from the air conditioning units of the vehicles
ahead. This can cause enough tiny drops to trigger the Rain Tracker. Also, there can simply be
tiny droplets of water in the air in extreme humidity—the Rain Tracker detects water droplets as
small as about two one-hundredths of an inch. Simply turn the Rain Tracker off under such
conditions.
If the Rain Tracker is left on all the time regardless of weather, some things can hit the sensor
perfectly, e.g. bugs, that cause a false trip. This should be so rare that it barely happens.
Wipers wipe when I drive
over bumps
Check to be sure that the sensor is securely snapped into the Rain Tracker coupler.
This can happen if the sensor cable has a long way to go to reach the headliner, and is not secured.
Solution: secure the sensor cable to the mirror mount base with a cable tie.
Wipers wipe when I tap
the sensor
Stop tapping the sensor. Properly installed, the sensor is immune to normal vehicle vibration.
Late First Wipe
As with all rain sensors (including those sold on new cars), there will be times when enough water
has hit the windshield that you would like the wiper to wipe, but none has yet hit the sensor.
These cases should be infrequent enough that they are easily ignored. The Rain Tracker is better
in this respect than most rain sensors in the new-car market.
Rain Tracker RT-50A Troubleshooting Procedure: Motor-switching Applications
www.raintracker.com
Page 6 of 6
Last Revised: 08/02/12
