Four Seasons 35986 HVAC Fast Idle Cut-Off Relay

Four Seasons 35986 Fast Idle Cut-Off Relay

The Four Seasons Relay line delivers OE-style electrical control for HVAC and engine-management related relay applications. This Four Seasons 35986 fast idle cut-off relay is a 12-volt, 30-amp standard relay with a square female connector and 5 blade terminals for direct-fit service on listed Ford, Mercury, Lincoln, and Jeep applications.

Key Features

• 12-volt standard relay for HVAC fast idle cut-off applications
• 30-amp amperage rating for common automotive relay circuits
• 5 blade terminals with female connector and male terminals
• Square connector shape with gray housing and skirt
• No bracket design for compact relay mounting
• Meets or exceeds OEM requirements
• Four Seasons part number 35986

Product Details

Built as a standard relay, this Four Seasons 35986 unit is intended for vehicles that use a 5-terminal blade-style relay in HVAC and related control circuits. The relay is listed for applications including Ford Tempo, Mercury Topaz, Ford Cougar, Ford Explorer, Ford Ranger, Ford Aerostar, Ford Bronco II, Lincoln Mark VII, and Jeep Comanche. In the Four Seasons Relay product line, this part is positioned as an OE-style electrical replacement for service work where correct terminal layout, voltage, and amperage rating matter.

This part cross-references Gates 19837 and FEL-PRO 35986 for the same application.

Vehicle Fitment

• Fits 1993-1994 Ford Tempo, Relay
• Fits 1988-1994 Mercury Topaz, Relay
• Fits 1990-1992 Ford Cougar, A/C Compressor Cut-Out Relay for Engine Cooling Fan Motor Relay; Relay
• Fits 1986-1988 Ford Cougar, A/C Compressor Cut-Out Relay for Engine Cooling Fan Motor Relay; Relay
• Fits 1991-1992 Ford Explorer, Relay
• Fits 1990-1992 Ford Ranger, Fits vehicles with air conditioning systems; Relay
• Fits 1988-1992 Ford Tempo, Relay
• Fits 1991-1992 Jeep Comanche, 5 Blade Term.; Relay
• Fits 1986-1992 Mercury Cougar, A/C Compressor Cut-Out Relay for Engine Cooling Fan Motor Relay; Relay
• Fits 1990 Ford Aerostar, Relay
• Fits 1989-1990 Ford Bronco II, A/C Compressor Relay; Throttle Cut Off; Relay
• Fits 1990 Lincoln Mark VII, Relay
• Fits 1982-1983 Ford Mustang, A/C Cut-Out Relay; Relay

Common Repair Uses

• Restores relay control in HVAC fast idle cut-off circuits
• Addresses intermittent A/C compressor relay operation on listed Ford and Mercury models
• Replaces worn or heat-damaged blade-terminal relays
• Supports proper switching in engine cooling fan motor relay applications noted in fitment
• Helps correct electrical faults caused by relay contact wear or terminal degradation

Installation Notes

Verify the relay connector shape, terminal count, and amperage rating before installation. This unit uses a square 5-blade female connector with male terminals and no bracket, so confirm the mounting style and cavity layout against the original relay. Match the vehicle application exactly, especially on Ford Ranger, Ford Bronco II, and Ford Cougar models where fitment notes reference A/C and throttle cut-off functions.

Quality Assurance

Four Seasons 35986 is listed as meeting or exceeding OEM requirements for the specified applications. Confirm the original relay part number and connector configuration during diagnosis to ensure the replacement matches the vehicle’s electrical system.