The genuine Western 87199 Harness connects your 2022-present GM truck headlights to the truck-side isolation module system. Consequently, this vehicle-specific lighting harness ensures clear electrical power delivery to your plow lights. Additionally, it prevents factory circuit errors during winter operations. Because of this, mechanics highly recommend upgrading worn or incorrect adapters with genuine replacement parts.
Benefits of the Western 87199 Harness
This 12-pin plug-in kit simplifies your truck-side electrical installation. Because of this matched setup, you do not need to splice into clean factory wiring. Furthermore, sturdy weather-resistant molded plugs guard your connections against severe winter moisture and corrosive road salt. Therefore, your plow lights switch reliably every time you toggle the cab controller.
As a result, you maintain safe nighttime visibility while plowing heavy commercial lots. Our site stocks this complete package for immediate shipping directly to your shop. Also, fleet owners can easily cross-reference electrical schematics and vehicle compatibility using our mechanic’s guides. Utilizing the exact Western 87199 Harness guarantees seamless integration with your existing 3-port isolation module. Similarly, applying dielectric grease to all plugs protects your electrical system investment.
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Connects 2022 and newer GM vehicle headlamps to the standard 3-port module system.
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Plug-and-play 12-pin connectors eliminate permanent factory wiring modifications.
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Heavy-duty wire casing resists severe sub-zero temperatures and chemical corrosion.
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Engineered specifically for late-model GM truck electrical systems.
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Isolation modules are sold separately.
Additional Info and Common Related Parts
| Part Number | Item Name | Technical Role |
| 29070-1 | 3-Port Isolation Module | Directs electrical lighting signals between the vehicle and the plow. |
| 49326 | Dielectric Grease | Seals and protects electrical terminal connections from moisture corrosion. |
| 38800 | Nighthawk LED Headlight Kit | Upgrades or replaces the plow-side lighting assembly. |
| 61548K | Plug Cover Kit | Protects electrical grille connectors from moisture when the plow is detached. |
Always refer to your Western Plow’s documentation and vehicle-specific installation instructions to confirm compatibility and proper installation procedures.
Quick delivery exactly what I needed!
It was fine.
Easy to find just expensive for few wires and plugs.