- The trailer backup lamp relay on the 1999 Ford E-350 is located in the passenger side kick panel, behind the glove box.
Here's how you can access and identify the trailer backup lamp relay:
1. Open the Glove Box: Open the glove box on the passenger side of the vehicle.
2. Locate the Kick Panel: On the right side of the glove box opening, you'll see a plastic kick panel.
3. Remove the Kick Panel: Gently pry off the kick panel by inserting a flat-head screwdriver or a panel removal tool into the gaps around its edges.
4. Locate the Relay Box: Behind the kick panel, you'll find the relay box. It's a black plastic box with several relays and fuses.
5. Identify the Backup Lamp Relay: The trailer backup lamp relay is typically labeled as "Backup Lamps" or "Reverse Lamps" in the relay box diagram on the inside of the cover.
6. Check or Replace the Relay: Visually inspect the backup lamp relay for any signs of damage or corrosion. If the relay looks damaged, replace it with a new relay of the same type.
