The main EFI relay on a 1985 Toyota Pickup is typically a small rectangular module mounted in the engine bay on the passenger-side firewall area, often near the brake master cylinder. Exact placement can vary by model and market, with some trucks having it tucked inside the cabin near the dash or glove box.
Understanding the EFI main relay
The EFI main relay is a pivotal component that powers the engine control unit (ECU) and the fuel injectors when the ignition is turned on. If this relay fails or loses power, the engine may crank but not start, or run intermittently. Locating and testing it is a common first step in diagnosing starting and running problems on older Toyota pickups.
Where to look for the main relay
These are the most common spots on a 1985 Toyota Pickup. The exact position can vary by cab style, market, and whether the truck uses a dash-mounted fuse block or an under-hood relay pack.
Under the hood: engine bay, passenger-side area
- On the passenger-side inner fender or near the firewall, often mounted to a small bracket or tucked against the brake master cylinder.
- Close to the engine wiring harness that feeds the ECU and injectors, sometimes near or on the ignition coil area.
- The relay is a small rectangular unit, usually with a multi-pin connector (commonly 4–6 pins) and a darker or tan-colored plastic body.
In many trucks, this is the most common and easiest-to-access location. If you find a neat block with several wires converging into a single plug, you’re likely looking at the EFI main relay.
Inside the cab: behind the glove box or under the dash
- Some 1985 pickups route the EFI relay to the interior fuse/relay area, placing it behind the glove box or near the driver’s kick panel.
- Access may require removing the glove box to view a small relay pack or a subset of the engine-electrical wiring tied into the ECU harness.
- The relay here will still have a multi-pin connector and will be labeled similarly to other EFI or ECU-related relays.
If the under-hood search yields nothing obvious, this interior location is worth checking. The cabin-mounted relay can be easier to swap in some configurations, but it requires more disassembly to reach.
Near the main fuse/relay block
- In certain trims, the EFI main relay is integrated near the primary fuse block, either under the hood on a relay panel or mounted inside the dash area adjacent to the fuse box.
- Look for a dedicated EFI/ECU relay labeled on or near the fuse panel, sometimes with a wiring bundle specific to the ECU.
This spot is less universal across all 1985 models, but it’s worth inspecting if you’ve located a fuse/relay cluster close to the firewall or dash that includes an EFI-related component.
How to confirm you found the correct relay
Once you locate a small rectangular relay with a multi-pin connector, verify it’s the EFI main relay by cross-checking its wiring: it should feed the ECU power and the fuel pump circuit when the ignition is on. If you’re uncertain, consult a service manual for your exact truck variant or look for markings such as “EFI MAIN RELAY” on the housing.
What to do if the relay is faulty
If the engine cranks but won’t start, or starts and stalls, a failing EFI main relay is a common culprit. Swap in a known-good relay or swap the suspected unit with a spare to test. If the vehicle starts with the known-good relay, you’ve confirmed the fault. Always disconnect the battery before removing or swapping relays to avoid shorts.
In summary, for most 1985 Toyota Pickups, begin your search at the passenger-side engine bay area near the firewall or brake master cylinder, then check interior locations behind the glove box or near the dash fuse block if needed. Correct identification and testing of the EFI main relay can save time when diagnosing starting and running issues.
Where is the EFI relay on a 1986 Toyota pickup?
The EFI relay in 1986-87 Toyota Pickups is typically located in the engine bay fuse box near the battery. Symptoms of a faulty EFI relay include engine stalling or failure to start.
How much is a 1985 Toyota pickup worth today?
1985 Toyota Pickup base price starts at $6,613 to $11,063.
Where is the main relay located?
Located in your vehicle's fuse box, which is commonly found under the passenger side dashboard or the engine bay, the main relay connects and controls the fuel system and the PCM.
Where is the main relay on a 1988 Toyota pickup?
For the 1988 Toyota Pickup, the EFI main relay is not under the fuse panel but typically located near the right-side speaker area. Confirm the open circuit relay's position first, then check wiring harnesses for corrosion or loose connections.