HomeBelts and Cooling > RelaysFour Seasons 35903 Engine Cooling Fan Motor Relay
Part #: 35903

Four Seasons 35903 Engine Cooling Fan Motor Relay

Relay
⚙️ 11 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Relay
🚗Fitment: Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac, Skyhawk, Cimarron, Cavalier, Firenza, J2000 Sunbird, and J2000
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Reliable Engine Cooling Fan Motor Relay for Select GM Vehicles

The Four Seasons Relay 35903 is a 12-volt engine cooling fan motor relay designed to maintain optimal cooling system performance. Engineered for compatibility with Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models, this relay ensures proper fan operation in vehicles like the Cavalier, Cimarron, Firenza, J2000, J2000 Sunbird, and Skyhawk.

Key Features of Four Seasons Relay 35903

  • 12-volt standard relay with a 30-amp amperage rating
  • Equipped with 4 blade terminals (male and female connectors)
  • Includes mounting bracket and protective skirt for secure installation
  • Rectangular connector shape in black color for easy identification
  • Meets or exceeds OEM specifications for reliable performance

About the Four Seasons Relay Product Line

The Four Seasons Relay product line focuses on delivering dependable electrical components for automotive cooling systems. The Relay 35903 is part of this line, offering a standard relay style that integrates seamlessly with factory wiring harnesses. This ensures consistent fan motor control and helps maintain engine temperature within manufacturer guidelines.

Detailed Product Description

This engine cooling fan motor relay operates at 12 volts and supports up to 30 amps, making it suitable for controlling the cooling fan in various GM vehicles. The relay features four blade terminals with a combination of male and female connectors, designed for straightforward installation and secure electrical connections. The included bracket and skirt provide additional mounting stability and protection against environmental factors. Its black rectangular connector shape matches OEM design, facilitating a direct replacement without modification.

Common Applications and Issues Addressed

  • Restores proper cooling fan operation in Buick Cavalier and Pontiac J2000 models
  • Resolves intermittent or non-functioning engine cooling fan problems
  • Prevents engine overheating caused by relay failure in Chevrolet Firenza and Oldsmobile Skyhawk
  • Eliminates electrical faults related to worn or damaged fan motor relays
  • Supports consistent engine temperature regulation for Cadillac and other compatible vehicles

Installation Notes and Tips

  • Verify vehicle compatibility with Buick, Cadillac, Chevrolet, Oldsmobile, or Pontiac models listed
  • Disconnect the battery before replacing the relay to avoid electrical shorts
  • Ensure the relay terminals align correctly with the vehicle’s wiring harness connectors
  • Use the included bracket and skirt for secure mounting and protection
  • Test the cooling fan operation after installation to confirm proper relay function

Quality Assurance and Warranty

The Four Seasons Relay 35903 meets or exceeds OEM standards, ensuring reliable performance and durability. Manufactured to strict quality controls, this relay is designed to provide consistent engine cooling fan operation. Warranty details are provided by Four Seasons and typically cover defects in materials and workmanship under normal use.

BrandFour Seasons
Part Number35903
PositionRelay
Amperage Rating30
Bracket?w/ Bracket
ColorBlack
Connector Genderfemale
Connector ShapeRectangular
DescriptionRelays
Meets / Exceeds OEM?Yes
Skirt?Yes
StyleStandard Relay
Terminal GenderMale
Terminal Quantity4
Terminal TypeBlade
TypeStandard
Voltage12

This part fits 11 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1984BuickSkyhawk2.0LL4N/AFits vehicles with air conditioning systems.; Relay
1984BuickSkyhawk1.8LL4N/AFits vehicles with air conditioning systems.; Relay
1984CadillacCimarronN/ARelay
1984ChevroletCavalierN/AFits vehicles with air conditioning systems.; Relay
1984OldsmobileFirenza2.0LL4N/AFits vehicles with air conditioning systems.; Relay
1984PontiacJ2000 Sunbird2.0LL4N/AFits vehicles with air conditioning systems.; Relay
1983BuickSkyhawkN/AFits vehicles with air conditioning systems.; Relay
1983CadillacCimarronN/ARelay
1983ChevroletCavalierN/AFits vehicles with air conditioning systems.; Relay
1983OldsmobileFirenzaN/AFits vehicles with air conditioning systems.; Relay
1983PontiacJ2000N/AFits vehicles with air conditioning systems.; Relay

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

01478212111359031406257714073422142491581025158388171129319144458191894101986420887024419225973391735903474670179884192AC8331HS192MT0519RE4279

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.