Blue Ox BX88143 - Manual (Page 4)

Blue Ox Division, Automatic Equipment Mfg. Co. • One Mill Road, Industrial Park
Pender, Nebraska 68047 • Phone 402-385-3051 • Fax 402-385-3360 • www.blueox.us TM
292-5640 4/06 3 of 12
INDICATOR LIGHT INSTALLATION
The BrakeSafe uses the towed vehicles brakes. Most vehicle’s brake lights work with the key in the off and in the accessory
position. This creates the possibility of the towed vehicle’s battery being drained while towing as the brake lights are activated each
time the brake pedal is depressed by the BrakeSafe. Included are electrical parts which bypass the towed vehicles battery while
towing. The only change you will notice to the towed vehicle is that the brake lights will only be activated by the brake pedal when
the ignition is in the "on" position. We also include a light indicator that is installed in the dash of the towing vehicle which lights up
when the brake pedal in the towed vehicle is pulled on by the BrakeSafe. (Fig. 1) WARNING: Motorhome dash light MUST be
installed or warranty will be void.
1. Locate the brake light switch which is activated when the brake pedal is pressed down. Locate the hot wire into the switch and
the wire from the switch to the brake lights. You will need to splice into the wire coming from the switch to the brake lights. Cut
the wire at a convenient place and strip the two ends.
2. If there is room, you can locate the relay where you cut the wires. If there isn’t room, splice wires onto the ones you cut to give
yourself working room. Black wire and butt connectors are supplied in the parts sack.
3. Strip one end of the yellow wire and twist it together with the wire coming from the brake switch. Crimp a female spade terminal
on the twisted pair. Slide the terminal over the male terminal on the relay labeled “87”.
4. Crimp a female spade terminal on the end of the wire going the brake lights. Slide this terminal over the male terminal on the relay
labeled “30”.
5. Locate a bolt to use as a ground. Cut a piece of the black wire long enough to reach from the relay to the bolt. Strip both ends of
the black wire and crimp a ring terminal on one end and a female spade terminal on the other. Put the ring terminal under the head
of the bolt and the spade terminal on the male terminal on the relay labeled “85”.
6. In the car's fuse panel locate a fuse that is "hot" only when the ignition switch is in "on" position. Use the mini fuse tapper with
fuse, crimp a female spade terminal on the end of black wire and attach it to fuse tapper. Cut a piece of black wire to reach from
the fuse to the terminal on the relay labeled "86".
7. Route the yellow wire from the relay through the engine compartment of the car into the wiring disconnect plug. Then from the
wiring disconnect plug on the back of the coach along the bottom of the coach and into the dash of the coach. Tie the wire to the
frame of the coach with cable ties or other suitable means.
8. Locate a suitable place in the dash and drill a half (1/2) inch hole for the light indicator. Crimp a butt connector to both wires and
insert the indicator into the dash.
9. Cut the yellow wire to length and attach it to one of the wires on the indicator. Locate a bolt to use as a ground. Cut a piece of
black wire to length and connect it to the other indicator wire, crimp a ring terminal on the other end of the black wire and fasten it
to the grounding bolt.
10. Gather up the wires and the
relay. Anchor them up out of
the way so they will not
interfere with driving the
vehicle.
TESTING
The electrical installation can be
tested to see if it is installed
correctly. When applying the
brakes with the key in the off
and the accessory position, the
rear brake lights should not
come on, but when applying the
brakes with the key in the on
position, the brake lights should
come on.
Figure 1