1. The Simple Checks:
* Bulbs: This is the most common cause. Check both bulbs to see if they're burned out. Replace them with the correct wattage bulbs. (Check your owner's manual for the correct type).
* Fuses: Your Neon has a fuse protecting the backup light circuit. Consult your owner's manual to locate the fuse box and identify the correct fuse for the backup lights. Check the fuse with a test light or by visually inspecting it for a blown filament. Replace any blown fuses with the same amperage rating. *Don't replace a blown fuse with a higher amperage fuse; this is a fire hazard.*
* Switch: The backup light switch is usually located on the transmission. When you shift into reverse, the switch should activate. This switch can fail mechanically or electrically. This requires some mechanical knowledge and/or access to a wiring diagram to test effectively.
2. More Involved Checks (Might require a multimeter and some electrical knowledge):
* Wiring: Inspect the wiring harness running from the backup light switch to the lights themselves for any breaks, chafing, or corrosion. A multimeter can help check for continuity (is the circuit complete?) in the wiring.
* Backup Light Switch: As mentioned above, the switch itself might be faulty. This often requires replacement, and possibly some disassembly to access it.
* Grounding Issues: A poor ground connection can prevent the lights from working. Check the ground points for the backup light circuit – clean them if necessary to ensure a good connection.
* Wiring Harness Connector: Check all connectors for corrosion and proper connection.
* Body Control Module (BCM): In some newer vehicles (depending on the Neon's year), the BCM controls the backup lights. A faulty BCM is less common, but it's possible. Diagnosing BCM issues usually requires specialized tools and knowledge.
3. Finding Information:
* Owner's Manual: Your owner's manual is your best friend. It will contain fuse box diagrams and bulb specifications.
* Online Forums: Search online forums specifically for Dodge Neons. There are many forums where owners have discussed similar problems and solutions.
* Repair Manuals: A repair manual (like a Haynes or Chilton manual) provides detailed diagrams and instructions.
Important Safety Note: Always disconnect the negative battery terminal before working on any electrical components in your vehicle. This will prevent accidental short circuits and shocks.
If you are not comfortable working with car electrical systems, it is best to take your Dodge Neon to a qualified mechanic for diagnosis and repair. Trying to fix electrical problems without the proper knowledge can lead to further damage.
