---
product_id: 50748389
title: "Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics"
brand: "maypole"
price: "B/.91"
currency: PAB
in_stock: true
category: "Maypole"
url: https://www.desertcart.com.pa/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer
store_origin: PA
region: Panama
---

# 12V coil voltage power 7-way relay for full trailer control Audible buzzer for indicator alerts Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics

**Brand:** maypole
**Price:** B/.91
**Availability:** ✅ In Stock

## Summary

> 🚛 Tow Smarter, Not Harder: The Ultimate 7-Way Relay for Next-Level Towing Confidence

## 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?** B/.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/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

- • **Universal Compatibility:** Works effortlessly with most vehicles and both filament & LED lamps—future-proof your towing setup.
- • **Smart Indicator Monitoring:** Internal buzzer alerts you to indicator status, muting automatically during hazard signals for peace of mind.
- • **Dual Voltage Differentiation:** Handles complex tail/brake and tail/fog systems with precision, ensuring no light confusion on the road.
- • **UK-Made Quality & Reliability:** Crafted in the UK with premium brass contacts and backed by a 2-year warranty—trusted by pros.
- • **Seamless Trailer Lighting Control:** Directly integrates with vehicle circuits for flawless trailer and caravan light synchronization.

## Overview

The Maypole 12V 7 Way Bypass Relay is a high-quality, UK-manufactured towing electrics solution designed to seamlessly control trailer and caravan lighting. Compatible with most vehicles and lamp types, it features an audible buzzer for indicator monitoring, supports dual voltage circuits, and offers reliable 15 Amp brass contacts. Ideal for professional-grade towing setups, it ensures safety and compliance with a 2-year warranty.

## Description

Buy Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics at desertcart UK. Free delivery on eligible orders.

## 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 | 4,044 in Automotive ( See Top 100 in Automotive ) 34 in Universal Accessories for Trailer Couplings |
| Brand | Maypole |
| Coil Voltage | 12 Volts |
| Connector Type | Through Hole |
| Contact Current Rating | 15 Amps |
| Contact Material | Brass |
| Contact Type | 7p7t |
| Country Of Origin | United Kingdom |
| Current Rating | 15 Amps |
| Customer Reviews | 4.6 4.6 out of 5 stars (450) |
| 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 |
| Number of Items | 1 |
| 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/41cf1DfsahL.jpg)
![Maypole 12V 7 Way Bypass Relay with Audible Buzzer Trailer and Caravan Towing Electrics - Image 2](https://m.media-amazon.com/images/I/41iJt5eBC+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/71RHDmS1XAL.jpg)

## Available Options

This product comes in different **Pattern** options.

## 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 . . . . .

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**Shop now:** [https://www.desertcart.com.pa/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer](https://www.desertcart.com.pa/products/50748389-maypole-12v-7-way-bypass-relay-with-audible-buzzer-trailer)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-09-06*