Summit Racing SpeedCard - learn how to get 15% back up to $150

Summit Racing SpeedCard - learn how to get 15% back up to $150

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Automotive Relays

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates...

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates a relay in its controls, including the starter, electric cooling fans, fuel pump, headlights, and air conditioner, plus accessories like nitrous, off-road lights, and winches.

Whether you’re assembling an all-new wiring harness, or making repairs to existing circuits, the extensive selection, powerful search tools, and tech expertise at Summit Racing Equipment will help you find the right size and amperage rating of relay for the job.

Top Brands

Generally speaking, a relay is an electronically operated switch that allows you to control a circuit with a low-power signal. Almost every system on your vehicle incorporates a relay in its controls, including the starter, electric cooling fans, fuel pump, headlights, and air conditioner, plus accessories like nitrous, off-road lights, and winches.

Whether you’re assembling an all-new wiring harness, or making repairs to existing circuits, the extensive selection, powerful search tools, and tech expertise at Summit Racing Equipment will help you find the right size and amperage rating of relay for the job.

Top Brands

Don’t take chances with a knock-off relay! Summit carries general purpose and application-specific relays from well-regarded brands like Painless Performance, MSD, Auto Rod Controls, Bosch, ACDelco, Standard Motor Products, Hella, and more.

Individual Parts

Results 1 - 25 of 208

Relay, Headlight, 40 Amp, Single Pole, 9004/9007, Each

Part Number: PRF-30816

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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Headlamp Relief Relay, 40 Amps, Dual Relays, 12 V, Kit

Part Number: RFW-HR58

4.57 out of 5 stars ( 7 )

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Relay, Auxiliary Light, 30 Amp, Single Pole, Each

Part Number: PRF-30803

Not Yet Reviewed

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Relay, Brake Light, 30 Amp, Single Pole, Each

Part Number: PRF-30105

Not Yet Reviewed

Estimated Ship Date: Tomorrow

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Headlamp Relief Relay, 40 Amps, Single Relay, 12 V, Kit

Part Number: RFW-HR56

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Jan 8, 2026 if ordered today

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Estimated Ship Date: Jan 8, 2026 if ordered today

Reverse Dome Light Relay, 12 V, 5-Blade, Kit

Part Number: RFW-RD3

Not Yet Reviewed

Estimated Ship Date: Jan 8, 2026 if ordered today

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Estimated Ship Date: Jan 8, 2026 if ordered today

Parts & Accessories ORACLE LED 2 Pin Relay Flasher

Part Number: ORC-2022-504

Not Yet Reviewed

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Relay, Auxiliary Lighting, General Use, 15 Amp/25 Amps, Single Pole, Each

Part Number: PRF-80136

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Tomorrow

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Driving/Fog Light Relay; Mini 20/40 Amp SPDT Relay; 12V Nominal; 8.5V Must Operate;

Part Number: HLA-007794321

4.67 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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Brake Attention Module, LED Lighting Module, 1.5 Amp Maximum, Each

Part Number: UPD-90655

4.64 out of 5 stars ( 14 )

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Relays, 40 amps, 12 V, Single Pole, 5 Blade Terminals, General Use, Auxiliary Lighting Usage, Each

Part Number: HLA-933332011

5.0 out of 5 stars ( 2 )

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Driving/Fog Light Relay; Mini 20/30 Amp SPDT Relay; w/Resistor; 12V Nominal; 8.5V Must Operate; 1V Must Releas

Part Number: HLA-933332181

Not Yet Reviewed

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Relay, Headlight, 12 V, OE-Style with Modern electronics, Saab, Each

Part Number: URO-008572

Not Yet Reviewed

Estimated Ship Date: Dec 29, 2025 if ordered today

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Estimated Ship Date: Dec 29, 2025 if ordered today

Relays, Headlight Enhancement Relay with G for Aaw, 12 V, 40 amps, Kit

Part Number: AWW-500403

4.89 out of 5 stars ( 18 )

Estimated Ship Date: Tomorrow

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Relays, Headlight Enhancement Relay with G for Aaw, 12 V, 40 amps, Waterproof, Kit

Part Number: AWW-500431

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Parking Brake Warning Relay, Brake Light Turn Signal Converter Module

Part Number: KCW-89688

Not Yet Reviewed

Estimated Ship Date: Dec 12, 2025 if ordered today

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Estimated Ship Date: Dec 12, 2025 if ordered today

Lens, Turn Signal / Parking Light, Amber, Jeep, Each

Part Number: OMX-1241101

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

Relay Board Assembly, RELAY BOARD ASSY., Complete 1967 Camaro w/RS electric headlights,

Part Number: AWW-40120

Not Yet Reviewed

Estimated Ship Date: Jan 14, 2026 if ordered today

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Estimated Ship Date: Jan 14, 2026 if ordered today

EM- Headlight Washer Rly

Part Number: SMP-RY-1570

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

EM- Headlight Washer Rly

Part Number: SMP-RY-1524

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

EM- Headlight Relay

Part Number: SMP-RY-1589

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

EM- Headlight Washer Rly

Part Number: SMP-RY-1605

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

EM- Headlight Relay

Part Number: SMP-RY-956

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

EM- Headlight Relay

Part Number: SMP-RY-1194

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

Headlight Relay

Part Number: SMP-RY-1789

Not Yet Reviewed

Estimated Ship Date: Dec 15, 2025 if ordered today

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Estimated Ship Date: Dec 15, 2025 if ordered today

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