

🚛 Light up your tow game with flawless control and smart alerts!
The Maypole 12V 7 Way Bypass Relay is a UK-made, CE-certified automotive relay designed to seamlessly control trailer and caravan lighting. Compatible with most vehicles and LED or filament bulbs, it features a 12V coil, 15A current rating, and an internal audible buzzer that monitors indicator signals while muting during hazard warnings. Its smart circuit differentiation supports dual voltage tail/brake and tail/fog systems, ensuring reliable, load-free operation. Ideal for professional installation, it offers a durable, surface-mount design with solder connectors and a 12-month warranty.


| ASIN | B07YWZ7KXF |
| Best Sellers Rank | 1,205 in Automotive ( See Top 100 in Automotive ) 2 in Car Relays |
| Brand | Maypole |
| Coil Voltage | 12 Volts (DC) |
| Connector Type | Solder |
| Connector type | Solder |
| Contact Material | Steel |
| Contact Type | Normally Open |
| Contact material | Steel |
| Contact type | Normally Open |
| Current Rating | 15 Amps |
| Current rating | 15 Amps |
| Customer Reviews | 4.6 out of 5 stars 397 Reviews |
| Included Components | 1 x relay |
| Item Type Name | MP3877B 12V 7 Way Bypass Relay |
| Manufacturer | Maypole |
| Minimum Switching Voltage | 12 Volts (DC) |
| Mounting Type | Surface Mount |
| Mounting type | Surface Mount |
| Operation Mode | Automatic |
| Product Warranty | 12 months |
| Specification Met | CE |
| Wattage | 5 watts |
J**S
Simple and Effective
Nice solution and easy to wire up, saved me sourcing the dedicated kit (Which was more expensive and very long delays in ordering) Instructions were clear, and all worked fine the first time post installation.
A**R
Perfect item that stops the cars brain having a fit.
Fitted this to my 2009 Ford Focus, so as not to upset the cars brain when I fitted my tow-bar, works perfectly and great price.
G**H
Fantastic
Can’t read this high enough straight swap from my old one that burnt out and works perfect no more light problems for me
D**E
Maypole trailer wiring kit
It's a quality item but it doesn't come with any wiring diagrams so you need to know trailer wiring or do what most will do and look on Google
G**K
Tow item
Easy to fit despite no instructions with it so you may need to look online
S**M
Wiring loom
Ordered for my husband good price,easy installation and easy to understand instructions
S**F
Teamwork
I have two of this . Ordered a second one because the right indicator wasn’t working . The new doing the same thing . Finally I sorted the problem whit two of this one is the left, the other one is the right. Maybe just for me I don’t know . But not working as it’s should...
R**N
Fitted
Delivered on time & fitted to car. Works well with a Trailer
Trustpilot
4 days ago
2 days ago