1. Identify the Problem:
* Which light is out? Front left, front right, rear left, rear right? This helps narrow down the location of the potential issue.
* Check all bulbs: It's possible more than one bulb is burned out. Even if you only notice one light is out, check the other running lights on the same side as a precaution.
* Visually inspect: Look for any obvious damage to the wiring harness near the light. Check the bulb socket for corrosion or damage.
2. Gather Supplies:
* Replacement bulbs: The correct wattage and type are crucial. Check your owner's manual or the bulb itself for the correct specifications. Auto parts stores can help you find the right ones.
* Screwdrivers (Phillips and/or flathead): Likely needed to access the light fixtures.
* Test light or multimeter (optional but helpful): To check for power at the socket and continuity in the wiring.
* Wire connectors or electrical tape (if needed): For repairing damaged wiring.
* Gloves (recommended): To protect your hands.
3. Access the Light Fixture:
This varies slightly depending on the year of your Pontiac Montana and the specific light fixture. Consult your owner's manual or search online for a repair guide specific to your vehicle's year and model. Generally, you'll need to:
* Front running lights: Often accessed from behind the front grille or bumper. This may involve removing some screws or clips.
* Rear running lights: Usually accessed from inside the rear cargo area or by removing parts of the taillight assembly.
4. Replace the Bulb (if that's the problem):
* Disconnect the power: This is crucial to avoid electric shock. You might need to disconnect the battery negative terminal.
* Remove the old bulb: Carefully remove the old bulb. It may twist out or have a retaining clip.
* Install the new bulb: Gently insert the new bulb, making sure it's properly seated.
* Reconnect the power: Reconnect the battery negative terminal if you removed it.
* Test the light: Turn on the headlights to confirm the new bulb is working.
5. Troubleshoot if the Bulb Isn't the Problem:
If replacing the bulb doesn't solve the issue, the problem likely lies elsewhere:
* Check the socket: Inspect the socket for corrosion or damage. Clean it with electrical contact cleaner if necessary.
* Check the fuse: Consult your owner's manual to locate the fuse for the running lights and check if it's blown. Replace it with a fuse of the same amperage if necessary.
* Check the wiring: Using a test light or multimeter, check for power at the light socket. If there's no power, trace the wiring back to identify a break or short circuit. This is more complex and may require advanced electrical knowledge or professional assistance.
* Grounding issues: Poor grounding can also cause lighting problems. Check the vehicle's ground points for corrosion or loose connections.
6. Seek Professional Help:
If you are not comfortable working with car electrical systems, take your Pontiac Montana to a qualified mechanic. Electrical problems can be complex, and improper repair can lead to further damage.
Remember to always consult your owner's manual for specific instructions and diagrams related to your Pontiac Montana's year and model. Online forums dedicated to Pontiac Montanas can also be a valuable resource.
