Vehicle-Specific Installation Notes

Rain Tracker Model: RT-40A
Vehicle-Specific Installation Instructions
The instructions included with the product tell you how to install a Rain Tracker. This page gives special vehicle-specific information. Print this page using your browser's print function.

Application Vehicles
These instructions apply to these vehicles, which all have similar wiper systems:

BMW 318 84 - 85
BMW 318 91 - 92
BMW 320 82 - 83
BMW 325 84 - 91
BMW 524 85 - 86
BMW 528 82 - 88
BMW 533 82 - 84
BMW 535 85 - 88
BMW 633 82 - 84
BMW 635 85 - 89
BMW 733 82 - 84
BMW 735 85 - 87
BMW L6 87 - 89
BMW L7 86 - 87
BMW M3 88 - 91
BMW M5 87 - 88
BMW M6 87 - 88

Wiring Diagrams and Drawings:

BMW Logic Diagram - Color Scheme 4- Drawing applies to all application vehicles listed above. Print this.
Troubleshooting procedure- Print out if needed.

Wire colors used in this vehicle:

+12V - LOCATE
GROUND - BRN
FAST-LOGIC - BLK/GRY
SLOW-LOGIC - BLK/BLU

Special Rain Tracker Installation Notes for this vehicle:

HOW THE SYSTEM FUNCTIONS
In the BMW system, the stock wiper switch grounds logic lines from the
Windshield Wiper Module (WWM) to cause the system to enter high and low
speed operation. The switch does not carry wiper motor current. When a
Rain Tracker is installed, it grounds appropriate logic lines in parallel
with the switch. Thus, the WWM thinks the driver is simply the selecting
the right speed. Some models and years may vary slightly in wire colors.
Factory drawings can be wrong, so, confirm wire colors with a multimeter.

All wiper system wires, except +12V, are available at the wiper switch. They
can usually be accessed by removing one or two access panels (Kick Panels) and,
possibly, the shrouds surrounding the steering column.

FIND +12V
For Rain Tracker power (+12V), locate a source of power hot in accessory
or run. Power source should be min. 12-16ga. wire on a 15-25A circuit. This
can be one of the +12V sources as shown on the diagram, or some other accessory
source. The cigarette lighter is often a good +12V source.

The RT-40A does not utilize the FAST windings of the wiper motor. Please disregard any references
to FAST that appear in these instructions.

The Rain Tracker wiper control system works in parallel with the existing wiper system, so the existing manual control modes are not affected. This page generated by vehicle data file name: bmw_logic_c4.veh