Relays in the 2003 Honda Pilot are located in two fuse/relay boxes: one under the hood and one inside the cabin under the driver’s-side dash. The exact relay you’re after (fuel pump, ECM/PCM, or cooling fan) is labeled on the box cover’s diagram.
Overview: two relay hubs for the Pilot
To understand where to look, it helps to know there are two main relay hubs on the 2003 Pilot. One sits in the engine bay and houses high-current relays connected to the engine and cooling systems. The other is inside the cabin and contains relays related to the vehicle’s electronics and interior systems. The covers on both boxes carry diagrams that identify each relay’s function.
Under-hood relay box location and contents
- Location: On the driver’s side of the engine bay, near the fender and typically close to the battery or inner fender.
- Contents: High-current relays such as the fuel pump relay and cooling fan relays, plus other engine-management relays as labeled on the box diagram.
- Access: Remove the relay box lid as needed; consider disconnecting the negative battery cable for safety when working with electrical components.
The under-hood box is the primary source for engine-related relays and is usually the first place to check if the vehicle has starting or fuel-delivery issues tied to a relay problem.
Interior fuse/relay box location and contents
Inside the cabin, the interior fuse/relay box is located on the passenger side under the dash, often behind a knee panel or near the glove box. The box cover includes a diagram that labels the relays and fuses contained inside.
- Location: Passenger-side under-dash area, commonly behind the glove box or adjacent to the kick panel.
- Contents: Relays related to interior and electrical systems, including the PCM/ECU relay and other cabin-related relays; exact types vary by model year and production run.
- Access: You may need to remove a panel or the cover to view the diagram and reach the relays.
Consult the interior box diagram to identify the precise PCM/ECU relay and any other relays associated with ignition, accessories, or lighting.
Tips for identifying and replacing relays
Relays are small rectangular modules with multiple pins. Use the diagrams on the box covers to locate the exact relay you need. If you’re troubleshooting, you can swap a suspected bad relay with a relay of the same type from the same box to test whether the problem follows the relay. When in doubt, consult the owner’s manual or a service manual for the exact relay part numbers and positions, or have a qualified technician assist.
Summary
For a 2003 Honda Pilot, relays are found in two locations: the under-hood fuse/relay box and the interior fuse/relay box under the driver’s dash. Each box has a diagram on its cover that identifies the relays and their functions, including the typical fuel-pump and ECU/PCM relays. Use these diagrams as your primary guide, and seek professional help if you’re unsure about handling electrical components.
Where is the starter relay on a 2003 Honda Pilot?
And it's going to be this top guy. And it's going to be this guy right here come over here to the side. And all the way in the back. This guy back here.
How to reset a 2003 Honda Pilot?
Now. I'm hoping that this resets it okay now that we've done that going to turn it off and see if it flashes when we turn the key back. On. No flashing maintenance light is reset.
What would cause my Honda Pilot not to start?
The number one reason your Honda won't start is likely the battery. There are many issues that can cause a battery to die, such as corrosion around the connections, bad wiring, or simply age. If a jump-start won't fix this issue, it may be time to get your battery replaced.
How to tell if a starter relay is bad?
6. Symptoms of starter relay failure
- 1) The vehicle cannot be started.
- 2)The start relay remains open after the engine is started.
- 3) The starter makes a clicking sound.
- 4)The vehicle starts intermittently.
- Material:
- Tool:
- Ensure that the car is parked safely and the transmission is in neutral or parked state.