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Chassis ground. Ensure this is a clean, paint-free metal contact. Ignition and Sensing
Negative door trigger. Connect to the interior light switch circuit (ground when door opens). Exterior Signaling
Indicator/Turn signal outputs. These provide the flashes when arming or disarming. cobra 4160 alarm wiring diagram
Most installers use the Violet and Grey wires for lock/unlock signals.
The Cobra 4160 uses a 6-pin secondary harness or internal relays to manage door locks. Chassis ground
You may need additional relays if your car uses a "positive trigger" or "vacuum" locking system, as the 4160 is natively set for "negative trigger" pulses. 🛠 Installation Tips & Safety
Automotive electrical systems are sensitive. Incorrectly tapping into an airbag (SRS) or ECU wire can cause expensive damage. Always use a digital multimeter—never a test light—to verify wires before stripping or soldering. Connect to the interior light switch circuit (ground
Negative output for additional sirens or modules (if applicable). 🔒 Central Locking Connections
The 4160 series belongs to the "Bridge" family of Cobra alarms. It features a compact siren/control unit usually mounted in the engine bay. Unlike modern CAN-bus systems, this is an analog alarm, meaning every connection requires physical splicing into the vehicle's electrical loom. ⚡ Main Wiring Loom Breakdown
The primary harness typically consists of a multi-pin connector. While wire colours can occasionally vary by region, the standard Cobra 4160 pinout follows this logic: Power and Ground