INSTALLATION AND OPERATING INSTRUCTIONS MANUAL

LIMITED LIFETIME WARRANTY*

INSTALLER: READ AND FOLLOW THESE INSTRUCTIONS CAREFULLY. THIS INSTRUCTION BOOKLET CONTAINS VALUABLE INSTALLATION AND ADJUSTMENT INFORMATION. LEAVE IN TOW VEHICLE.
OWNER: READ THESE INSTRUCTIONS CAREFULLY. KEEP THIS BOOKLET IN YOUR TOW VEHICLE FOR FUTURE REFERENCE.

This package includes: Control Module, Mounting Bracket, Mounting Hardware

*Limited Lifetime warranty for the original owner only, accompanied by proof of purchase

Congratulations!

You have just purchased the most innovative, high tech electronic UNIVERSAL brake controller on the market today. The Micro Control #81750 is the only electronic microprocessor brake controller in the industry. It will provide up to 24 Amps of continuous current and is the perfect choice to service 2, 4, 6 & 8 brake systems.

The automatic mode is designed to give smooth, reliable braking under normal driving conditions. In the automatic mode, the control module continuously monitors the brake light switch. When the brake pedal is depressed, the microprocessor reads a deceleration value from the pendulum sensor. The pendulum (Fig. 2) gives a direct measurement of tow vehicle deceleration during braking. The microprocessor then converts the deceleration value to an output current to the trailer brakes. The trailer brakes are then applied in direct proportion to the tow vehicle braking effort. During the stop, the brake intensity will be displayed on the front panel LEDs (Fig. 1).

IMPORTANT NOTE: IN THE AUTOMATIC MODE, THE TRAILER BRAKES ARE ENERGIZED ONLY WHEN DECELERATION IS DETECTED BY THE PENDULUM SENSOR (FIG. 2). WITH THE VEHICLE STANDING STILL AND THE BRAKE PEDAL DEPRESSED, THERE SHOULD BE NO OUTPUT TO THE TRAILER.

MANUAL ENERGIZE BUTTON

The manual energize button allows the operator to override the automatic mode and apply only the trailer brakes. This can be very useful in reducing trailer sway. To operate the manual energize button, simply push on the button in the direction of the energize arrow (Fig. 1). A slow, steady application of the manual energize button results in an incremental increase in output current. Additionally, the manual button is NOT affected by the gain setting and is capable of engaging the trailer brakes full on at any time. As a safety measure, the manual button is designed to illuminate the brake lights on both the tow vehicle and trailer.

WARNING
TRAILER BRAKE LOCK-UP COULD CAUSE LOSS OF CONTROL OF TRAILER AND/OR TOW VEHICLE.

All 81750 controllers come with a remote ready jack (Fig. 1) to accept the optional manual remote control (Fig. 3). The manual remote energize control is a complete functional extension of the manual energize button. The remote control allows the operator to manually apply the trailer brakes in the palm of his/her hand. As with the manual, the remote is also designed to illuminate the brake lights on both the tow vehicle and trailer. (See remote packaging for instructions).

In the automatic mode, the front panel LEDs (Fig. 1) will display the instantaneous brake intensity. One to four LEDs will light up depending on the gain setting and the deceleration force sensed during each stop. After the vehicle has stopped, the first LED will, remain lit until the brake pedal is depressed, indicating that the brake pedal is still depressed.

NOTE 1 - Under normal operation, the LEDs will continue to display brake intensity even if the trailer is not connected.

In the manual mode, the LED display indicates the desired output to the trailer brakes. One to four LEDs light up depending on the incremental input sensed from the manual or remote button.

The front panel LEDs also display the gain setting (Fig. 4) at the operator's request, the gain setting is displayed using the numbers in conjunction with the front panel LEDs. To display the current gain setting, momentarily push and release the gain button. To determine the gain setting, simply add the numbers next to the corresponding LEDs ( Fig. 1). For example, selecting gain setting number five will illuminate the first and fourth LED. The gain setting is continually displayed for approximately one minute or until the first activation of the brake pedal or manual functions.

NOTE 2 - The brake pedal and manual button must be released to operate the gain setting.

The 81750 control module has a high tech microprocessor design which allows for the innovative energy saving sleep mode. The sleep mode is a feature which lowers the current draw to the control module to allow for extended tow vehicle storage without excessive battery drain. After 8 hours of inactivity (No Braking), the microprocessor shuts down the control module and enters into the sleep mode. While in the sleep mode, the microprocessor draws almost no current. The control module automatically wakes from sleep mode when you depress the brake pedal or push the gain button. When the gain button is depressed, the front LED display will flash. When the brake pedal is depressed, the automatic braking will be active until the pedal is released.

WARNING
THE SLEEP MODE WILL MAKE THE MANUAL AND REMOTE INOPERATIVE UNTIL THE CONTROLLER WAKES FROM SLEEP MODE. ALWAYS MAKE SURE THE CONTROLLER IS ACTIVE BEFORE TOWING.

The gain setting (Fig. 4) adjusts the intensity of trailer braking according to the load weight and axle capacity. The gain setting is selected by the operator and automatically stored in memory by the microprocessor. After the controller is initially powered-up, the gain setting will have a default value of 1. To display the current gain setting, momentarily push and release the gain button (Fig. 1). Each additional push increments the gain ONE setting. The initial setting should be selected from the chart provided (Fig. 4). If gain selection is too hard or too soft, adjust the gain setting up or down until the desired braking effort is established.

How to use the gain setting chart (Fig. 4).

1. Determine the total axle capacity for your trailer.

2. Determine or estimate the total load weight including the trailer.

3. Compute the load weight to axle capacity ratio. (Example 1)

4. Choose a gain setting that represents that ratio

for a starting point of your trailer brake adjustment.

EXAMPLE 1: The customer has a 3 axle trailer that can haul up to 10,000 tbs. He/she estimates the total loaded weight to be approximately 7,500 lbs. This gives a weight ratio of 7,500110,000 = 0.75 or 75% of the total axle capacity. Using these figures, he/she selects gain setting 6 for a starting point of the trailer brake adjustment.

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