trailer is being towed. Note that it is also critical that the trailer brake battery is not connected to any other charging circuit on the tow vehicle. Connecting the trailer brake battery to a second charging source will cause sporadic operation and communication errors between the actuator and in-cab controller.
Trailer Mounted Brake Battery All of the power for the trailer brakes is drawn from the trailer mounted trailer brake battery. For proper operation, the system needs a “deep cycle” battery with a minimum capacity of 17 amp hours. Note that the trailer brake battery also provides power to the trailer brakes in the event of an emergency breakaway.
Breakaway Switch The system also includes an emergency breakaway switch. The breakaway switch is mounted on the trailer and is connected electrically to the trailer brake battery and to the CARLISLE actuator. The switch is also connected mechanically to the tow vehicle. When a breakaway condition occurs, the plunger on the breakaway switch is pulled out by the tow vehicle, thereby completing an electrical circuit between the trailer brake battery and the breakaway circuit on the CARLISLE actuator. When a breakaway condition is sensed by the CARLISLE actuator, the trailer brakes are automatically applied at full power.
The in-cab controller gives the vehicle operator a means to increase or decrease the amount of trailer braking. It also provides both audible and visible indications of any problem detected by the internal monitoring system. The in-cab controller is equipped with colored LEDs to indicate gain setting (green), brake output (red) and system problem status codes (yellow). It also has pushbutton switches to adjust the output of the trailer brakes versus the towing vehicle (i.e. gain) and to manually apply the trailer brakes. The in-cab controller is easily installed by inserting its’ power plug into the cigarette lighter receptacle (not an accessory power receptacle) on the tow vehicle and turning the running lights on. Note that the unit must be plugged in each time that the towing vehicle is started. The unit will automatically check to make sure that the running lights are on and that the system is functioning as designed. In the event that a problem is detected, the unit will flash the yellow status light on the face of the unit and will make a series of audible “beeps”. The number of beeps is an indication of the problem that the system has detected. Count the number of beeps and check the chart on the back of the unit to obtain direction on possible causes of the problem (see Section J. Trouble Shooting Guide). The unit must be unplugged each time the tow vehicle is taken out of the service and the running lights are shut off. A series of rapid beeps from the unit is an indication that you either are driving without having your running lights on or that you forgot to unplug the unit when the vehicle was shut off.
Manual 440-1002 Rev C
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