Owner`s manual

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DAY-TO-DAY OPERATION

Figure 17

PRESS CORD LOCK

FIRMLY INTO THE

12-VOLT OUTLET.

Step Three

Plug in the power cord

Check the 12-volt outlet socket before plugging

in the 9700 12-volt power cord, to make certain

that the socket has been wired correctly. The con-

tact point at the bottom of the socket should be

positive, and the outer shell around the top of the

socket should be negative. If the positive and

negative connections have been reversed, the

fuse in the 9700 power cord will blow when the

cord is plugged into the 12-volt outlet.

1. Plug the 12-volt power cord into the 12-volt out-

let, and secure it by pressing the cord lock (Figure

17) into the 12-volt outlet.

Push the cord lock forward, into the 12-volt out-

let, to properly secure the 12-volt power cord. If the

cord lock is not over the 12-volt outlet, the power

cord may vibrate loose, causing a loss of power or

an intermittent power supply. The 9700 will not func-

tion without a continuous power supply.

2. Now, the red light on the 12-volt power cord

should illuminate. (One of the four LEDs under the

“Pressure” button will also illuminate, to indicate the

current brake pressure setting. You will adjust this

setting in Step Five — “Set the brake pressure.”)

If the red light on the 12-volt power cord does

not illuminate, there is no power.

Some vehicles only have power at the outlet

when the engine is running. If there is no power, you

can install ROADMASTER’s optional 12-volt outlet kit

(part number 9332). When installed, this outlet kit will

provide power even when the engine is off.

3. When the power cord is plugged in, the air com-

pressor will run, until the air reservoir is filled. Wait

for the air reservoir to fill before pressing the “Test”

button (Step Four, next).

CAUTION

Step Four

Test and adjust positioning;

deplete the vacuum in the power brakes

Before towing, always press the “Test” button

down, then release it — the 9700 will cycle the pedal

clamp up and down three times.

This test cycle is necessary for two reasons: 1) to

ensure that the 9700 is positioned correctly; and 2)

to deplete any stored vacuum in the towed vehicle’s

power brake system.

Always deplete the stored vacuum in the towed

vehicle’s power brake system before towing —

press the “Test” button down, then release it, to

cycle the pedal clamp up and down three times.

Depending on the make and model of the towed

vehicle, it may be necessary to repeat the test cy-

cle a second time.

If the vacuum is not released, the 9700 will

apply excessive braking force when it is activat-

ed, which will cause severe tire and/or brake sys-

tem damage to the towed vehicle.

1. Press the “Test” button (Figure 18) on the top of

the 9700 down, then release it. The 9700 will cycle

the pedal clamp up and down three times.

If the 9700 moves excessively, or interferes with

seat position controls, adjust its position. Check the

adjustable seat pad and readjust it, if necessary.

If the adjustable seat pad is not properly posi-

tioned, the 9700 can “climb” up the driver’s seat —

the rear of the box will rise up off the floor.

Unless the 9700 is properly positioned, it will

not function at full capacity — the pedal clamp will

not apply the proper braking pressure against the

brake pedal.

Check the adjustable seat pad after the pedal

clamp has cycled during a test. If the rear of the

box has “climbed” the driver’s seat, readjust the

seat pad so that the 9700 cannot “climb.”

CAUTION

Figure 18

PRESS AND

RELEASE THE

“TEST” BUTTON.

CORD

LOCK

CAUTION