Toyota Highlander / Corolla / Prado / RAV4 2-Pin 4.8mm A/C Condenser Fan Waterproof Connector – OEM 90980-11237 / 7283-8221-40

This is the direct OEM-specification replacement for the Sumitomo 2-pin waterproof wire harness connector used on the A/C condenser fan motor and radiator cooling fan motor across Toyota Highlander, Corolla, Land Cruiser Prado, and RAV4 platforms. Cross-references Sumitomo / Toyota OEM part numbers 90980-11237 and 7283-8221-40. Uses the 4.8mm contact series in black nylon housing with waterproof sealing — the 4.8mm series is Toyota’s standard high-current connector for cooling fan motors where the connector must carry the full motor current (typically 10–25A) in a high-heat, high-vibration underbonnet environment.

If your Toyota A/C stops blowing cold air in slow traffic, or the cooling fan is not running when the A/C is switched on, a failed or corroded 2-pin fan connector is one of the most common and most overlooked causes. This connector is the single point of failure between the vehicle harness and the condenser fan motor — and it is frequently misdiagnosed as a refrigerant leak, a failed compressor, or a blown fuse before the connector is inspected.

Why the OEM 90980-11237 Connector Fails

The condenser fan connector is located in the engine bay, directly behind the front grille, in one of the most exposed positions on the vehicle. It is subjected to:

• Road spray and car wash water — which penetrate aged or cracked connector seals and corrode the 4.8mm terminals
• Heat cycling — from the A/C condenser and engine bay, which causes the nylon housing to become brittle and the locking tab to fracture
• Vibration — from the fan motor and engine, which causes fretting corrosion at the terminal contact surface
• Physical damage — during radiator, condenser, or front bumper removal for maintenance or collision repair

A high-resistance connection at the 4.8mm terminal causes the fan motor to draw more current than rated, which accelerates terminal corrosion and can eventually cause the connector housing to melt. Replacing the connector at the first sign of A/C performance degradation prevents a more expensive fan motor replacement.

OEM Part Number Cross-Reference

2-Pin Circuit Function

Key Specifications

Confirmed Compatible Models

How to Diagnose a Failed A/C Fan Connector

1. Switch on the A/C and set to maximum cooling. With the engine running, check whether the condenser fan (located in front of the radiator) is spinning.
2. If the fan is not spinning, check the A/C fan fuse and relay first. If both are good, proceed to the connector.
3. Disconnect the 2-pin fan connector (OEM 90980-11237). Inspect the terminals for green or white corrosion, bent pins, or a fractured locking tab.
4. With a multimeter, test for 12V at pin 1 of the harness-side connector when the A/C is on. If 12V is present but the fan does not run, the fan motor has failed. If there is no voltage, the fault is in the connector, wiring, or relay.
5. Test continuity between pin 2 of the harness-side connector and chassis ground. Resistance should be less than 0.5Ω.

Frequently Asked Questions

Q: My Toyota Highlander A/C stops working in traffic but works fine at highway speed — is this the connector?
A: This is the classic symptom of a failed or high-resistance condenser fan connector. At highway speed, airflow through the condenser is sufficient to cool the refrigerant without the fan. In slow traffic, the condenser fan is essential — if it is not running due to a failed connector, the A/C compressor shuts down as a safety measure. Inspect the 2-pin connector (OEM 90980-11237) before replacing the compressor or recharging the refrigerant.

Q: Can I use this connector on both the condenser fan and the radiator fan?
A: Yes. On most Toyota Highlander, Corolla, Prado, and RAV4 models, both the A/C condenser fan and the radiator cooling fan use the same 2-pin 4.8mm Sumitomo connector (OEM 90980-11237 / 7283-8221-40).

Q: Are terminals included?
A: Yes. Pre-fitted 4.8mm terminals are included with all variants. No additional tools are required for installation beyond a terminal removal pick and a crimping tool if you are replacing the wiring.

Q: What wire gauge is compatible with the 4.8mm terminals?
A: The Sumitomo 4.8mm terminal is compatible with 14–18 AWG wire (1.0–2.5mm²), suitable for the current loads of Toyota cooling fan motors.