L I N X W I T H A T R A F L E X I N S T A L L A T I O N
Brake Signal Relay Installation
Linx with Atra Flex Installation for Model 424 Automotive Dynamometers
40
BRAKE SIGNAL RELAY INSTALLATION
Use the following instructions along with Figure 33 on page 41 if you are upgrading an
existing dyno. If you are installing a new dyno, skip these instructions and continue
with “Tension the Belt” on page 42.
1
Disconnect the 4WD power supply.
2
Turn off the power to the dyno electronics.
3
Remove the two brake signal wires from the terminal labeled BRK IN on the 4WD
board.
4
Cut off the ferrules and strip the wires.
5
Attach the butt connector from the relay 85 to the green brake signal wire.
6
Attach the butt connector from the relay 86 to the white brake signal wire.
7
Remove the black and white power wires from the terminal labeled GND and +12
on the 4WD board.
8
Cut off the ferrules and strip the wires.
9
Attach the butt connector from the white jumper wire to the white power wire.
10 Insert one of the ferrules from the white jumper wire to the BRK IN terminal and
secure.
11 Insert the other ferrule from the white jumper wire to the +12 terminal and
secure.
12 Attach the butt connector from the relay 30 to the black power wire.
13 Insert the ferrule from the relay 30 wire to the GND terminal and secure.
14 Attach the yellow wire from the relay 87a to the open BRK IN terminal.
15 Secure the relay to the 4WD board using an existing nut.
16 Reconnect the 4WD power supply.
17 Turn on the power to the dyno electronics.
18 Wheelbase adjustment may now be performed only with the dyno brakes released.
