Wiring Diagram [cracked] | Ignition Interlock Device Intoxalock
When you fail a breath test, the blue wire energizes the relay coil, switching Pin 30 from 87a to 87 (nothing). This breaks the connection to the starter, so the car cranks but never starts.
The most complex part of the is the starter relay integration. You are inserting the IID between the ignition switch and the starter solenoid. Ignition Interlock Device Intoxalock Wiring Diagram
This information is for general educational and troubleshooting reference only. Wiring configurations vary significantly based on vehicle make, model, year, and engine type (gas/diesel/hybrid). Improper installation can damage the ECU, trigger airbag lights, or cause starter failure. Always refer to the specific installation guide provided by Intoxalock for your vehicle or consult a certified professional installer. When you fail a breath test, the blue
| Wire Color | Common Label | Function | Connection Point | | :--- | :--- | :--- | :--- | | | Battery +12V (Constant) | Provides continuous power to memory and clock. | Direct to vehicle battery positive terminal OR constant 12V at ignition harness. | | Black | Chassis Ground | Completes the circuit and provides reference voltage. | Bare metal chassis ground (not painted screws). | | Yellow | Ignition Switched 12V | Tells the device when the key is turned to "ON/RUN." | Ignition harness wire that reads 12V only when key is on. | | Blue | Starter Kill Output | Triggers the relay to cut the starter wire. | Pin 85 or 86 on the starter relay. | | White | Data / Handset Link | Sends rolling code data to the handheld unit. | Connects directly to the handset cradle (RJ-12 phone jack style). | | Green | Status / Horn Bypass | Optional; used for horn alert if required by state. | Vehicle horn relay (rarely used). | You are inserting the IID between the ignition
While the basic Intoxalock wiring diagram uses 6 standard colors (Red, Black, Yellow, White, Green, Blue), modern vehicles require advanced integration with CAN bus and brake interlocks. Never attempt to install or modify this wiring yourself unless you are a certified Intoxalock technician. Improper wiring can trigger a tamper detection, extending your mandatory interlock period by 6–12 months.
When viewing an Intoxalock wiring diagram, you will generally see four primary connections that must be made to the vehicle's harness. This is often referred to as a "4-wire system," though modern units may have extra wires for data or accessories.