Figure 12: Ring Connector On Ground Wire; Figure 13: Ground Connection - Cal Amp LMU-26xx Install Manual

The connection method must be applied to all installations:
1. Install a ring connector on the Ground wire (Black) as shown below.
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.
3. Identify the main harness for the vehicle's key. Use a DVOM (Multimeter) or test light to verify
the constant +12VDC 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" produce +12VDC on the
Ignition sensor wire.
MBUD-0199v3.3

Figure 12: Ring Connector on Ground Wire

Figure 13: Ground Connection

CalAmp | LMU-26xx Install Guide
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