1. Determine if your Montana has a factory wiring harness:
* Check the rear of your vehicle: Look near the rear bumper or taillights for a connector that looks like a flat, rectangular plug with multiple wires. This is the most common location. If you find one, it's likely a factory harness.
* Consult your owner's manual: Your owner's manual might specify if your vehicle came with trailer wiring and where the connector is located.
2. If you have a factory harness:
* Locate the connector: Find the connector as described above.
* Obtain a trailer wiring harness adapter: You'll need a harness adapter that matches the connector on your vehicle. Auto parts stores sell these; they're usually specific to the vehicle year and model. The adapter will have a plug that fits your vehicle's connector and a socket that matches your trailer's connector.
* Connect the adapter: Plug the adapter into your vehicle's harness.
* Connect the trailer harness: Plug the trailer's harness into the adapter.
* Test the lights: Connect your trailer and test all the lights (running lights, brake lights, turn signals) to ensure they function correctly.
3. If you don't have a factory harness:
This is more involved and requires some electrical knowledge or the help of a professional. Here's a general overview:
* Purchase a wiring harness kit: Auto parts stores sell kits specific to your vehicle's year and model. These kits usually include everything you need: wiring, connectors, instructions, and potentially a mounting bracket.
* Run the wires: Carefully route the wires from the kit to the taillights. You'll likely need to remove interior panels to do this. Try to keep wires out of the way of moving parts and protect them from abrasion.
* Connect to the taillights: This is the most crucial and potentially dangerous step. You'll need to connect the wires from the kit to the correct wires in your taillights. Incorrect connections can damage your vehicle's electrical system or cause dangerous malfunctions. Refer to your vehicle's wiring diagram (often available online) or consult a professional if unsure. Common wires to connect include:
* Running lights (taillights): Usually a constant 12V power source.
* Brake lights: A switched 12V source that turns on when the brake pedal is depressed.
* Turn signals: A switched 12V source that alternates between the left and right.
* Ground: A connection to the vehicle's chassis for grounding.
* Connect to the power source: Many kits require a connection to a fused power source, typically in the fuse box. Again, consult the wiring diagram or a professional to make the correct connections.
* Mount the connector: Secure the connector in an appropriate location, protected from the elements.
* Test the lights: Connect your trailer and test all the lights to ensure they function correctly.
Important Considerations:
* Safety: Incorrect wiring can lead to malfunctioning lights, which is a safety hazard. If you are not comfortable working with car wiring, consult a qualified mechanic.
* Wiring diagrams: Finding a wiring diagram for your specific Pontiac Montana year and model is highly recommended, it will greatly help in identifying the correct wires to connect to. You can find these diagrams online through forums or repair manuals.
* Fuse protection: Always use fuses of the appropriate amperage to protect your vehicle's electrical system.
This information is for general guidance only. Always consult your vehicle's owner's manual and follow the instructions provided with your chosen wiring kit. If you're unsure about any part of the process, seek professional help. Improper wiring can be dangerous.
