--- product_id: 50748389 title: "Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics" brand: "maypole" price: "10998 som" currency: KGS in_stock: true reviews_count: 8 category: "Maypole" url: https://www.desertcart.kg/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer store_origin: KG region: Kyrgyzstan --- # 12V coil voltage power 7-way relay for seamless trailer connection Audible buzzer for indicator alerts Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics **Brand:** maypole **Price:** 10998 som **Availability:** βœ… In Stock ## Summary > πŸš› Tow Smarter, Drive Safer – Never Miss a Signal! ## Quick Answers - **What is this?** Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics by maypole - **How much does it cost?** 10998 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer) ## Best For - maypole enthusiasts ## Why This Product - Trusted maypole brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **UK-Trusted Quality:** Manufactured with precision and backed by a 2-year warranty for peace of mind - β€’ **Universal Compatibility:** Works flawlessly with most vehicles & LED/filament bulbs for ultimate towing flexibility - β€’ **Audible Indicator Alerts:** Internal buzzer monitors flashers & indicators, muting during hazards to keep you informed - β€’ **Easy Professional Fitment:** Recommended installation by auto electricians or tow bar centers ensures reliable performance - β€’ **Smart Circuit Differentiation:** Separates dual voltage tail/brake & tail/fog systems for precise lighting control ## Overview The Maypole 12V 7 Way Bypass Relay with Audible Buzzer is a high-performance towing electrics solution designed to seamlessly control trailer and caravan lighting. Compatible with most vehicles and bulb types, it intelligently manages dual voltage circuits and provides audible alerts for indicators, enhancing safety and convenience. Engineered for professional fitment and backed by a 2-year warranty, this UK-trusted relay ensures reliable, hassle-free towing electrics. ## Description From the manufacturer MP3877 12V 7 Way Bypass Relay A 7 way bypass relay is connected directly to the vehicles lighting circuits to control the lights on a trailer and caravan. The relays do not put any extra load onto the vehicles lighting system. The relays also feature a built in audible buzzer that monitors the trailer and caravan indicators. Works on most vehicle types and most filament bulb and LED lamp combinations Differentiates circuits on dual voltage tail/brake and tail/fog systems Monitors indicators / flashers via the internal buzzer, which mutes under hazard warning conditions Ancillary flasher/indicator monitor output to panel lamp or additional buzzer Made in the UK 55cm cable length This towing bypass relay is compatible with vehicles that use multiplexed (shared-signal) wiring systems for position/brake and position/fog lightsβ€”as long as these signals are still present as physical wires at the rear light clusters. For other lighting functions, such as indicators, the relay requires separate signal wires running to each rear light cluster. It will not work with vehicles that use fully digital or network-based systems (such as CANBUS control) with no direct rear signal wiring. If you're unsure about your vehicle's wiring configuration, please consult a qualified auto electrician before purchase. Review: Easy to understand and install - Worked great on my ford smax, very easily installed Review: Great upgrade - I upgraded 7pin setup to 13pin setup and this works as treat. It runs my caravan fridge while driving. ## Features - A 7 way bypass relay is connected directly to the vehicles lighting circuits to control the lights on a trailer and caravan - Works on most vehicle types and most filament bulb and LED lamp combinations - Differentiates circuits on dual voltage tail/brake and tail/fog systems - Monitors indicators, flashers via the internal buzzer, which mutes under hazard warning conditions - Ancillary flasher or indicator monitor output to panel lamp or additional buzzer - Made in the UK - Fitment is recommended by an auto electrician or tow bar fitting centre ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003H5FX6Q | | Best Sellers Rank | 25,346 in Automotive ( See Top 100 in Automotive ) 276 in Universal Accessories for Trailer Couplings | | Brand | Maypole | | Coil Voltage | 12 Volts | | Connector Type | Through Hole | | Connector type | Through Hole | | Contact Current Rating | 15 Amps | | Contact Material | Brass | | Contact Type | 7p7t | | Contact material | Brass | | Contact type | 7p7t | | Country Of Origin | China | | Current Rating | 15 Amps | | Current rating | 15 Amps | | Customer Reviews | 4.6 out of 5 stars 449 Reviews | | Global Trade Identification Number | 05013008038772 | | Included Components | 1 x relay | | Item Type Name | MP3877 12V 7 Way Bypass Relay | | Item Weight | 125 Grams | | Manufacturer | Maypole | | Manufacturer Part Number | 3877 | | Minimum Switching Voltage | 12 Volts (DC) | | Model Number | 3877 | | Mounting Type | Screw Mount | | Mounting type | Screw Mount | | Operation Mode | Electric | | Product Warranty | 2 year manufacturer | | Specification Met | CE | | Wattage | 16.4 watts | ## Product Details - **Connector type:** Through Hole - **Contact material:** Brass - **Contact type:** 7p7t - **Current rating:** 15 Amps - **Mounting type:** Screw Mount ## Images ![Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics - Image 1](https://m.media-amazon.com/images/I/614z5+2QwfL.jpg) ![Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics - Image 2](https://m.media-amazon.com/images/I/51qUP7vlj-L.jpg) ![Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics - Image 3](https://m.media-amazon.com/images/I/91PdT5dnp3L.jpg) ## Questions & Answers **Q: Will this work with a 2015 Kia Sportage?** A: Should work with any car that has 7 pin towing socket already fitted **Q: Does this work with vehicles with canbus?** A: I fitted this to my 2009 VW Transporter. It works fine. The unit requires a 12v power supply and I took mine direct from the battery using an in-line fuse. I firstly fitted one that only works on the indicators and that didn’t work. I would recommend this unit. **Q: Will this work on 2014 Peugeot Partner van?** A: Could not say 100% for sure but I don't see why not as it is a universal fit and should not interfere with the lighting CANBUS system if fitted to your vehicle. It simply takes low power triggers from each light cable which then activates its own internal power relays fed by an independent 12volt feed that you will need to install to power the unit.. Works a treat on my 59 Qashqai nTec. **Q: Will this fit 2009 vauxhall insignia estate** A: It will work, though a 2009 may not actually need one as perhaps not canbus wiring, due to it's age? But if there's any doubt - I'd say fit one to be on the safe side . . . . . ## Customer Reviews ### ⭐⭐⭐⭐⭐ Easy to understand and install *by A***Y on 18 September 2025* Worked great on my ford smax, very easily installed ### ⭐⭐⭐⭐⭐ Great upgrade *by S***E on 9 November 2022* I upgraded 7pin setup to 13pin setup and this works as treat. It runs my caravan fridge while driving. ### ⭐⭐⭐⭐⭐ Maypole, Good stuff as usual! *by J***M on 2 April 2018* Maypole, Good stuff as usual. This unit appears to contain small relays powered separately by a power connection which is supplied from the battery / fuse box. This means that the existing wiring does not have much additional load, just enough to turn on the relay(s) The Buzzer for the indicators is pretty loud as well, can't ignore it. ## Frequently Bought Together - Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics in Display Packaging, Black - TAILONZ PNEUMATIC 1/4"NPT Solenoid Valve 4V210-08 AC110V Single Coil Pilot-Operated Electric 2 Position 5 Way Connection Type Junction Box - Beduan 2 Way Normally Closed DC 12V Electric Solenoid Air Valve 1/8" NPT --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kg/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer](https://www.desertcart.kg/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-05-26*