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ER-SF1 Event Recorder with J1939 Network Instructions for Self Installation
recorder. The gauge of wire being tapped into provides a good indication. A larger gauge wire is
often the best choice.
Connect the BROWN WIRE to a 12V-24V power source that is IGNITION-SWITCHED
CAUTION:
THIS IS A FUSED CONNECTION. DO NOT CUT OFF OR REMOVE THE FUSE
HOLDER.
CAUTION:
The brown wire to a 12V-24V power source that is ignition-switched is important to
ensure the event recorder can identify when the ignition is switched on and off and to control the
event recorder's Hibernation mode. This connection requires a 12V or 24V power source that is
"on" either when the ignition is keyed all the way forward to the ON position and all the way back
to the OFF position. Failure to properly connect this fused connection may lead to vehicle battery
drain.
Common Mistake for Brown Wire Connections: This connection is often mistakenly made to a
modulated circuit—one that comes out of a computer control module running some subsystem in
the vehicle. This can give false ignition on/off signals. To avoid this, connect this wire to a circuit
that is on the battery side of any modules. Consult the vehicle wiring schematics or a local
authorized dealership to obtain this info.
Connect the BLACK WIRE to a Good Solid Vehicle Ground
CAUTION:
THIS IS A FUSED CONNECTION. DO NOT CUT OFF OR REMOVE THE FUSE
HOLDER.
This connection is usually made via ring terminal to ground lug in the vehicle, supplied by the
vehicle manufacturer for aftermarket products. If one is not available, ensure that the connection
is solid to a metal portion of the vehicle which is directly grounded to the vehicle frame. Ensure
there is no corrosion or paint interfering with this connection.
Instructions for Basic Connections
1. Find a suitable location to make electrical connections (usually behind/under the
dashboard or power distribution center).
2. Connect the red, brown, and black wires from the Vehicle Interconnect Cable leads to the
vehicle as shown in the Electrical Connections Overview Diagram above. Be sure to follow
the parameters for each wire, detailed above.
Connect to the Vehicle J1939 Network Interface
Connectivity to the vehicle J1939 network is achieved with a coupling device called the CAN
Coupler. This device makes use of inductive technology to allow the ER to read the data on the
J1939 network without requiring any puncture, cut, or splice into the vehicle cabling.
© 2017 Lytx, Inc. – Confidential & Proprietary – For Velociti's Use Only Re Beta ER-SF1 Installations. Page 20 of 26
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