2-Pack 1156 / 1157 BAY15D Lamp Socket Adapter — Plug-and-Play Wiring Made Easy Upgrade or replace your vehicle's lighting wiring harness with this convenient 2-pack of pre-wired bulb socket adapters. Compatible with a wide range of standard automotive bulb types, these durable connectors make DIY light extension or socket replacement fast and straightforward — no mechanic needed. Made in Mainland China. Key Features Broad Compatibility: Fits P21W, 7528, 1156, 1157, BA15S, BAY15D, BAU15S, 7440, 7443, 7506, P21W, 2056, and 1141 bulbs — ideal for brake lights, tail lights, turn signals, and more. Pre-Wired Plug-and-Play: Arrives ready to install with 12–18 cm wire leads. Simply plug in and go — no splicing or soldering required. High-Efficiency Copper Wiring: Quality copper conductors ensure reliable electrical contact and minimal resistance for consistent, dependable performance. Heat-Resistant Nylon Construction: Built from durable ABS plastic and nylon materials that withstand the high temperatures commonly found in automotive lighting environments. Create Extra Light Outlets: Use as an extension socket to add an additional light output point in your vehicle's lighting circuit. 12V DC Compatible: Designed for standard 12-volt automotive electrical systems found in cars, trucks, motorcycles, and more. Value 2-Pack: Includes two lamp holder sockets so you can tackle both sides of your vehicle in one purchase. Specifications Voltage: DC 12V Material: Plastic, Metal, ABS, Nylon Style: Pre-Wired Plug Wire Length: 12–18 cm Compatible Bulbs: P21W, 7528, 1156, 1157, BA15S, BAY15D, BAU15S, 7440, 7443, 7506, 2056, 1141 Country of Origin: Made in Mainland China What's in the Box 2× LED Light Bulb Socket Adapter (pre-wired) Related Products You May Like Explore more automotive accessories and tools in our store: "1% Better Every Day" Motivational Canvas Poster | "Everything Is Fine" Funny Men's Graphic T-Shirt For guidance on automotive lighting safety standards, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer product safety information. Learn more: Automotive lighting Frequently Asked Questions Q: What bulb types are compatible with these 1156/1157 BAY15D socket adapters? A: These socket adapters are compatible with a wide range of standard automotive bulb types, including P21W, 7528, 1156, 1157, BA15S, BAY15D, BAU15S, 7440, 7443, 7506, 2056, and 1141 bulbs — covering most common brake light, tail light, and turn signal applications. Q: Do I need any special tools or professional help to install these bulb socket adapters? A: No special tools or mechanic experience is required. Each socket comes pre-wired with 12–18 cm leads, making installation a simple plug-and-play process. Just connect the socket to your existing wiring harness and insert your bulb. Q: Can these socket adapters be used to add an extra light outlet in my vehicle? A: Yes! These adapters are great for creating an additional light outlet in your vehicle's 12V DC lighting circuit, making them useful for custom lighting builds, extension projects, or replacing a damaged socket. Q: Are these sockets heat-resistant enough for automotive use? A: Absolutely. The sockets are constructed from high heat-resistant nylon and ABS materials specifically chosen to handle the elevated temperatures typical in automotive lighting applications.