Best Relay Fuses for Headlights: Reliable 12V 4-Pin Relays for GM SUVs
If you’re troubleshooting headlights, a high-quality 12V 4-pin headlight relay is essential. This guide highlights five dependable options that fit GM trucks and SUVs, with clear reasons to choose each one. These picks help improve headlight reliability, DRL performance, and overall lighting consistency. They’re best for DIY installers, fleet keepers, and GM SUV owners who want a straightforward, plug-and-play replacement.
Summary table of selected products:
| Product | ||
|---|---|---|
| 15016745 4-Pin Headlight Relay Fuse Module (Fit4drive) | GM SUVs and trucks needing a direct OE-style replacement | Directly replaces #46 relay, robust build |
| (Pack of 2) Relay 15016745, 601-218 RY560 (Casalytics) | Backup spares for GM lighting circuits | OEM-compatible, easy swap |
| 15016745 Headlight Relay (3 Pack) Sonzrod | DRL and low-beam circuits in GM SUVs | Multi-pack value, DRL-friendly |
| QKYS 2PCS 12088567 8567 Automotive Relay | GM, Buick, Cadillac, Chevrolet variety | Wide compatibility, 12V, 20A |
| (Pack of 4) High Power 4-Pin Fuse Box Relay 13500114/8385 | Multiple GM circuits including headlights | OEM cross-compatibility, durable |
15016745 4-Pin Headlight Relay Fuse Module
The Fit4drive relay module is a direct replacement for OEM part numbers including 15016745 and 13506836. It’s designed for GM vehicles such as Silverado, Trailblazer, Envoy, Sierra, and LaCrosse. The unit is built for high-temperature and corrosion resistance to protect the headlight system from electrical faults. It is intended for simple, tool-free installation and provides a reliable swap for the #46 relay in the fuse box under the hood.
Best for: GM truck and SUV owners who want a straightforward, under-hood relay replacement with solid durability and OE-part compatibility.
Caution: Verify the exact OEM part number in your fuse box before ordering to ensure correct fitment for your vehicle model year.
(Pack of 2) Relay 15016745, 601-218 RY560
This Casalytics pack provides two relays compatible with Chevrolet, GMC, and Buick vehicles, matching OEM numbers like 15016745, 1R1944, RY560, and 13506836. It’s a direct replacement for the under-hood #46 relay, designed to restore lighting performance without extensive wiring. The two-pack is ideal for stocking up as a backup or for two separate headlight circuits.
Best for: GM SUV owners who want OEM-number-matched spares for quick, reliable headlight restoration.
Caution: Ensure your vehicle’s fuse box position and relay footprint match the 4-pin design before purchase.
15016745 Headlight Relay (3 Pack) Sonzrod
The Sonzrod three-pack targets high-current DRL and low-beam circuits, replacing OEM numbers including 15016745 and 13506836. It’s positioned for GM SUVs such as Trailblazer, Envoy, Rainier, and Isuzu Ascender. The kit emphasizes durability with silver-plated contacts for better conductivity and supports reliable operation in the engine bay. It’s well-suited for drivers who prefer having a spare relay set on hand.
Best for: GM SUV owners who want multiple relays for DRL and headlight circuits, with a focus on high current handling.
Caution: Check your vehicle year and fuse box layout to confirm the relay footprint and position before ordering.
QKYS 2PCS 12088567 8567 Relays
The QKYS relays are compatible with Buick, Cadillac, Chevrolet, GMC, and Pontiac vehicles, matching multiple OEM numbers such as 12088567, 13502679, and 19116057. They’re 12V DC relays capable of handling up to 20A, suitable for controlling headlights, DRLs, and other high-current circuits. The relays are designed for harsh engine compartments and broad GM vehicle compatibility, making them a flexible option for mixed fleets or multiple GM models.
Best for: GM owners who want a versatile, OEM-number-aligned relay option with reliable 12V performance.
Caution: Verify the exact engine bay relay box position and pin layout to ensure compatibility with your model.
(Pack of 4) High Power 4-Pin Fuse Box Relay 13500114/8385
This Formiden 4-pack features OEM-quality relays that align with GM part numbers 13500114 and 12135170, among others. It’s suited for GM models spanning Buick, GMC, Cadillac, and Chevrolet. The set covers multiple applications including headlights and fans, offering broad compatibility and durable construction designed to endure engine bay conditions. The option is valuable for owners who want multiple, high-capacity relays in one purchase.
Best for: Buyers who need bulk relays for multiple GM circuits or for fleet maintenance kits.
Caution: Review the specific part numbers and pin configuration before ordering to ensure one-for-one swap compatibility with your vehicle.
Buying Guide: Key Considerations For Choosing Headlight Relays
- Vehicle compatibility: Confirm the exact OEM part numbers (for example 15016745, 13506836, 601-218) and the relay’s fit in the fuse box under the hood. Incompatibility can cause failure to engage headlights.
- Current rating and duty: Ensure the relay supports the current draw of your headlight or DRL circuits. A relay rated too low may overheat or fail under use.
- Pin configuration and footprint: Most 4-pin relays share a common layout, but verify the footprint and connector shape to match your vehicle’s harness and fuse box.
- Durability in extreme conditions: Look for relays described as high-temperature, oxidation, and corrosion resistant for engine bay environments.
- Ambience of use: If you rely on DRLs, consider relays marketed for DRL and low-beam circuits to ensure reliability across lighting modes.
- Spare availability: Some buyers benefit from multi-packs or backup relays to reduce risk of headlight outages while on the road.
- Installation effort: Direct replacement relays that require no tools or wiring are easier for quick DIY fixes; more complex packs may need basic wiring skills.
Frequently Asked Questions
- What is a headlight relay and why replace it?
A headlight relay is an electrical switch that controls the headlight circuit. Replacing a faulty relay can restore headlight operation and prevent fuse box issues. - Are these relays compatible with multiple GM models?
Yes, many relays in this guide list compatibility across Chevrolet, GMC, Buick, and related models, with OEM part number matches. - Can I use a DRL-focused relay for headlight circuits?
Some relays are marketed for DRL and low-beam use; verify that the relay supports your headlight and DRL configuration. - Do I need professional installation?
For simple direct-replacement relays, a DIY installation is feasible for most owners. More complex multi-relay kits may require basic electrical wiring know-how. - Should I buy a pack or a single relay?
If you drive GM SUVs with multiple headlight or DRL circuits, a pack can offer value and backup options; otherwise, a single OEM-replacement may suffice. - What should I check before ordering?
Confirm part numbers, relay footprint, pin layout, and the vehicle’s fuse box position to ensure correct replacement.