Keep the cooling fan cycling on cue with the Walker Products Engine Cooling Fan Switch 212-1004. It drops in as a direct-fit replacement across a long list of early-1980s Chrysler, Dodge and Plymouth models, including the 1981-1985 Plymouth Reliant, 1982-1985 Dodge Aries, 1982-1985 Chrysler New Yorker, 1983-1985 Chrysler LeBaron and 1982-1983 Dodge 400 — see the "Vehicles it fits" section for the full list of applications.
This switch opens or closes the electric fan circuit at a precise coolant-temperature threshold, signaling the radiator or condenser fan to activate when cooling is needed and shut off once the target temperature is reached.
- Temperature-based fan control: regulates electric radiator or condenser fan operation based on engine coolant temperature.
- Sealed construction: built with thermally responsive elements and sealed against coolant exposure and under-hood contaminants.
- OE-replacement calibration: engineered to match the factory switching temperature, thread pitch and electrical connection.
- Direct fit: threads into the original mounting location and connects using the factory electrical harness.
Overheating, a fan that runs too long, or poor A/C performance can be signs this switch may need replacing. If a failed fan switch is the cause, this OE-replacement unit restores accurate temperature-based fan control.
Interchange: 15-50363 · 182-01 · 182-02 · BK-5105
1550363 · 18201 · 18202 · BK5105 · 1S4372 · TFS688 · 4221284 · 36499 · 8491 · RF46 · TS165 · 73105 · SW530
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
15-50363, 1S4372, TFS688, 4221284, 36499, 8491, 182-01, 182-02, BK-5105, RF46, TS165, 73105, SW530
Frequently Asked Questions
What does this cooling fan switch do?
It opens or closes the electric fan circuit at a precise coolant-temperature threshold, turning the radiator or condenser fan on when cooling is needed and off once the target temperature is reached.
What are signs this fan switch may need replacing?
Overheating, a fan that runs longer than expected, or poor A/C performance can point to a faulty switch. Diagnose the cause first, since these symptoms can have other sources.
Will the 212-1004 fit my vehicle?
It's a direct-fit replacement for many early-1980s Chrysler, Dodge and Plymouth models. Check the "Vehicles it fits" section to confirm your exact year, make and model.
Where does this switch mount?
It threads into the original mounting location — typically the radiator tank, cylinder head, or thermostat housing — and connects using the factory electrical harness.
Is any wiring or modification required?
No. It's designed to install in the original location and match the factory switching temperature, thread pitch and electrical connection, so no trimming or rewiring is required.
