{"title":"Peterbilt 378 Light Truck Parts","description":"\u003ch2\u003e\u003cstrong\u003ePeterbilt 378 Light Truck Parts\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eROADWEST provides OEM-style Peterbilt 378 light truck parts engineered to restore visibility, maintain safety, and keep your 378 looking factory-correct. These lighting components deliver dependable fitment, durable construction, and straightforward installation for daily on-road performance.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eDesigned for select Peterbilt 378 configurations. Light components may vary by model year, bezel style, housing type, and electrical layout. Always review product photos, specifications, and connector details on each item page to confirm compatibility with your 378.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eIncluded Peterbilt 378 Light Components\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete headlight assemblies for Peterbilt 378\u003c\/li\u003e\n\u003cli\u003eHeadlight housings, sealed beam options, and mounting buckets\u003c\/li\u003e\n\u003cli\u003eHeadlight bezels, trim rings, and chrome dress components\u003c\/li\u003e\n\u003cli\u003eFog lights, driving lamps, and auxiliary lighting options\u003c\/li\u003e\n\u003cli\u003eMarker lights, clearance lights, turn signal lamps\u003c\/li\u003e\n\u003cli\u003eBulbs, sockets, wiring harnesses, and pigtail connectors\u003c\/li\u003e\n\u003cli\u003eAdjusters, mounting brackets, and hardware kits\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMore Peterbilt Lighting Categories\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Headlight Truck Parts\" href=\"\/collections\/peterbilt-headlight-truck-parts\"\u003ePeterbilt Headlight Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Fog Light Truck Parts\" href=\"\/collections\/peterbilt-fog-light-truck-parts\"\u003ePeterbilt Fog Light Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Headlight Bezels Truck Parts\" href=\"\/collections\/peterbilt-headlight-bezels-truck-parts\"\u003ePeterbilt Headlight Bezels Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eRelated Peterbilt Exterior Categories\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Exterior Truck Parts\" href=\"\/collections\/peterbilt-exterior-truck-parts\"\u003ePeterbilt Exterior Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Mirror Truck Parts\" href=\"\/collections\/peterbilt-mirror-truck-parts\"\u003ePeterbilt Mirror Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Hood and Grille Truck Parts\" href=\"\/collections\/peterbilt-hood-grille-truck-parts\"\u003ePeterbilt Hood \u0026amp; Grille Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Fenders and Mud Flap Truck Parts\" href=\"\/collections\/peterbilt-fenders-mud-flap-truck-parts\"\u003ePeterbilt Fenders \u0026amp; Mud Flap Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eElectrical \u0026amp; Accessories for Peterbilt 378\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Electrical and Power Truck Parts\" href=\"\/collections\/peterbilt-electrical-power-truck-parts\"\u003ePeterbilt Electrical \u0026amp; Power Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Truck Parts Accessories\" href=\"\/collections\/peterbilt-truck-parts-accessories\"\u003ePeterbilt Truck Parts Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca title=\"Peterbilt Truck Parts\" href=\"\/collections\/peterbilt-truck-parts\"\u003eAll Peterbilt Truck Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eROADWEST provides factory-direct quality, dependable fitment, and fast U.S. shipping.\u003c\/p\u003e","products":[{"product_id":"peterbilt-378-379-4x6-headlight-housing-base-wire-harness-led","title":"Peterbilt 378\/379 4×6 Headlight Housing Base + Wire Harness (LED)","description":"\u003cp\u003eThe \u003cstrong\u003eROADWEST LED 4x6-inch Headlight Housing Base with Wire Harnesses\u003c\/strong\u003e is built for classic \u003cstrong\u003ePeterbilt 378 and 379\u003c\/strong\u003e trucks running dual 4x6 headlights. Whether you are restoring a work truck or upgrading to LED lamps, this housing provides a solid OE-style foundation.\u003c\/p\u003e\n\u003cp\u003eEach assembly combines a \u003cstrong\u003ehigh-durability composite housing\u003c\/strong\u003e with a \u003cstrong\u003eplug-and-play wiring harness\u003c\/strong\u003e to support 4x6 halogen or LED sealed-beam headlights. It’s an excellent choice when your original headlight buckets are cracked, rusted or hacked from previous repairs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect-fit Peterbilt replacement\u003c\/strong\u003e for 378 and 379 trucks using 4x6 headlight systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports halogen \u0026amp; LED\u003c\/strong\u003e 4x6 sealed-beam headlights for flexible upgrade options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlug-and-play installation\u003c\/strong\u003e with pre-terminated connectors – no cutting or splicing required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComposite housing\u003c\/strong\u003e resists vibration, road salt and weather exposure for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for LED conversions\u003c\/strong\u003e when upgrading the factory headlamps to modern lighting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eROADWEST\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003ePeterbilt 378 \/ 379 – 4x6 Headlight Systems\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBulb Support\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e4x6-inch Halogen \/ LED Sealed-Beam\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug-and-Play, Direct Replacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eHigh-Durability Composite Housing\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePosition\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eFront – Driver \u0026amp; Passenger Side (Headlight Housing Base)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Components\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eHeadlight Housing Bases with Wire Harnesses (Pair)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFit Type\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Specific Fit – Peterbilt 378 \/ 379\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eROADWEST\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"ROADWEST","offers":[{"title":"Default Title","offer_id":41860214423655,"sku":"MZ-10-3350-05","price":66.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7612\/3239\/files\/kenworth-46-headlight-housing-base-harness-t400t600t800w900k100c500-led-roadwest-truck-parts-mz-10-3350-05-high-soar-8470012.jpg?v=1768890558"},{"product_id":"4x6-headlight-housing-base-with-wire-harnesses-for-peterbilt-378-379","title":"Peterbilt 378\/379 4×6 Headlight Housing Base + Wire Harness","description":"\u003cp\u003eRefresh the front end of your classic Pete with the \u003cstrong\u003eROADWEST 4x6 Headlight Housing Base with Wire Harnesses\u003c\/strong\u003e, designed specifically for \u003cstrong\u003ePeterbilt 378 \u0026amp; 379\u003c\/strong\u003e models using dual 4x6 headlights.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeterbilt 378\u003c\/strong\u003e (1987–2007)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeterbilt 379\u003c\/strong\u003e (1987–2007)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis kit includes \u003cstrong\u003edriver and passenger side headlight housing bases\u003c\/strong\u003e with integrated wiring harnesses for a clean, OE-style installation. It is compatible with standard \u003cstrong\u003e4x6-inch sealed beam headlights\u003c\/strong\u003e, whether you run halogen or LED upgrades.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOE-style replacement\u003c\/strong\u003e for cracked, rusted or damaged headlight buckets on Peterbilt 378\/379 trucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDOT-approved construction\u003c\/strong\u003e helps maintain compliance and safe night-time visibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-wired harnesses\u003c\/strong\u003e simplify installation and help ensure solid electrical connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with 4x6 sealed beam lamps\u003c\/strong\u003e including common halogen and LED replacements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for heavy-duty use\u003c\/strong\u003e on linehaul, owner-operator and show-style Peterbilt builds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eROADWEST\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003ePeterbilt 378 \/ 379 (1987–2007) – 4x6 Headlight Systems\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePosition\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eFront – Driver \u0026amp; Passenger Side\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDOT Approved\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Bulbs\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e4x6-inch sealed beam (halogen or LED)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIncluded Components\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003e2 × Headlight Housing Bases with Wire Harnesses (Left \u0026amp; Right)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFit Type\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eVehicle Specific Fit – Peterbilt 378 \/ 379\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003e\u003cstrong\u003eHeadlight housing replacement \/ restoration for dual 4x6 systems\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"ROADWEST","offers":[{"title":"Default Title","offer_id":41896588083303,"sku":"MZ-10-3350-05","price":66.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7612\/3239\/files\/peterbilt-378379-46-headlight-housing-base-wire-harness-roadwest-truck-parts-b09m6ctk8h-high-soar-4708346.jpg?v=1768890561"},{"product_id":"for-peterbilt-359-362-378-379-4-6-halogen-headlights-pair-direct-fit-dot-approved","title":"For Peterbilt 359\/362\/378\/379 4×6 Halogen Headlights Pair – Direct Fit DOT Approved","description":"\u003cp data-end=\"869\" data-start=\"360\"\u003eUpgrade the lighting performance of your Kenworth with the Headlight Assembly Pair, engineered for \u003cstrong data-end=\"502\" data-start=\"469\"\u003eKenworth T600, T800, and W900\u003c\/strong\u003e trucks. These OE-style halogen headlamps feature durable glass lenses, ABS frames, and a reinforced PP+GF30% base for long-lasting reliability. Waterproof sealing and plug-and-play installation make it easy to replace old or damaged headlights while restoring bright, clear road visibility. A perfect fit for daily driving, fleet maintenance, and long-haul trucking.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eKenworth T600, T800, W900; Peterbilt 359, 362, 378, 379\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage \/ Wattage\u003c\/th\u003e\n\u003ctd\u003e12V DC \/ 40W‑60W (4652 bulb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eLens: Glass, Frame: ABS, Base: PP+GF30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePosition\u003c\/th\u003e\n\u003ctd\u003eFront Outside (Driver \u0026amp; Passenger Side)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFeatures\u003c\/th\u003e\n\u003ctd\u003ePlug-and-Play, Waterproof, OE Fitment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eTransparent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"ROADWEST","offers":[{"title":"Default Title","offer_id":41907343622247,"sku":"MZ-3350","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7612\/3239\/files\/Peterbilt3593623783794x6HalogenHeadlightsPair_DirectFitDOTApproved_1.webp?v=1769680584"},{"product_id":"led-headlight-bezel-for-peterbilt-378-379-chrome-led-headlight-bezel-led-w-12-amber-strip-3-2048-3","title":"LED Headlight Bezel For Peterbilt 378\/379 Chrome LED Headlight Bezel  – LED w\/ 12\" Amber Strip (3-2048-3)","description":"\u003cp\u003eUpgrade your truck’s front-end styling and visibility with this chrome headlight bezel featuring an integrated 12\" amber LED light strip. Built as an OE-style direct replacement for OE reference \u003cstrong\u003e3-2048-3\u003c\/strong\u003e, this bezel adds a clean chrome look while improving marker\/turn signal visibility (wiring required).\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Truck Fitment:\u003c\/strong\u003e Compatible with Kenworth T400, T600, T800, W900B, W900L, Classic 120\/132; Peterbilt 378, 379; Western Star 4900; and Freightliner FLD Classic XL.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated 12\" Amber LED Strip:\u003c\/strong\u003e Dual-intensity amber LED strip supports marker\/running light or turn signal function (vehicle wiring required).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOE-Style Replacement:\u003c\/strong\u003e Direct-fit design replaces OE reference \u003cstrong\u003e3-2048-3\u003c\/strong\u003e for easier installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDOT Approved:\u003c\/strong\u003e Built to meet DOT requirements for road-use applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Chrome-finished ABS housing with polycarbonate lens helps resist impact and daily road wear.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeather-Resistant Build:\u003c\/strong\u003e Waterproof, impact-resistant design helps improve durability in harsh driving conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eChrome Headlight Bezel with LED Light Strip\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eOE Reference\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e3-2048-3\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eKenworth T400, T600, T800, W900B, W900L, Classic 120\/132; Peterbilt 378, 379; Western Star 4900; Freightliner FLD Classic XL\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eChrome-Finished ABS + Polycarbonate Lens\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eLED Feature\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003e12\" Amber LED Strip (Dual-Intensity)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eLight Function\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eMarker \/ Running Light or Turn Signal (Wiring Required)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eDOT Approved\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eDirect Fit, No Assembly Required\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003cstrong\u003eSpecial Features\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd\u003eWaterproof, Impact-Resistant, Enhanced Styling\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFitment Note\u003c\/h3\u003e\n\u003cp\u003ePlease confirm your truck model, headlight bezel style, and OE reference \u003cstrong\u003e3-2048-3\u003c\/strong\u003e before ordering. LED light strip wiring is required to enable marker\/running light or turn signal functionality.\u003c\/p\u003e","brand":"ROADWEST","offers":[{"title":"Default Title","offer_id":41926168871015,"sku":"B09V7CNNJN","price":30.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7612\/3239\/files\/12ChromeHeadlightBezelsDualRectangleForKenworthT600Peterbilt379LH_RH_4.webp?v=1770627905"}],"url":"https:\/\/roadwesttruckparts.com\/collections\/peterbilt-378-light-truck-parts.oembed","provider":"RoadWest Truck Parts","version":"1.0","type":"link"}