CalAmp | LMU-26xx Install Guide
MBUD-0199v3.3
Page 17
The connection method must be applied to all installations:
1.
Install a ring connector on the Ground wire (Black) as shown below.
Figure 12: Ring Connector on Ground Wire
2.
Select a common grounding point and connect the negative, grounding-wire lead (black lead) to
its ground, the negative battery lead can be used.
The common ground is through the vehicle’s chassis and connected using a Ring Terminal, Star
Washer and a ½-inch self-tapping screw or using a provided vehicle ground under the dash.
Figure 13: Ground Connection
3.
Identify the main harness for the vehicle’s key. Use a DVOM (Multimeter) or test light to verify
the co12VDC and Ignition sense wires.
Ignition sensor wire refers to a Key controlled power source that has +12VDC in both the Run
and Start positions. Under no circumstance will the "Accessory Position" p12VDC on the
Ignition sensor wire.