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🚛 Tow Smarter, Not Harder: The Ultimate 7-Way Relay for Next-Level Towing Confidence
The Maypole 12V 7 Way Bypass Relay is a precision-engineered towing electrics solution designed to seamlessly control trailer and caravan lighting. Featuring a 12V coil, 7p7t brass contacts rated at 15 amps, and an integrated audible buzzer for indicator monitoring, it supports both filament and LED lamps across most vehicle types. Made in the UK and recommended by professionals, this relay ensures reliable, safe, and hassle-free towing with a 2-year manufacturer warranty.
| ASIN | B003H5FX6Q |
| Best Sellers Rank | 31,295 in Automotive ( See Top 100 in Automotive ) 264 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 |
| Current Rating | 15 Amps |
| Current rating | 15 Amps |
| Customer Reviews | 4.6 out of 5 stars 454 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 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Operation Mode | Electric |
| Product Warranty | 2 year manufacturer |
| Specification Met | CE |
| Wattage | 16.4 watts |
K**R
As advertised
Works fine.
S**L
Excellent product
Works well
L**A
It is exactly what it says on their box
Fantastic. A bit of kit. Just a what I needed
A**Y
Easy to understand and install
Worked great on my ford smax, very easily installed
H**R
Works well, but no instructions!
This relay works impressively well - once installed - and that’s why it got 4 stars! On the packaging it clearly states, ‘Instructions Included’, but they simply weren’t. There was mention of a website, but going there led to an indecipherable list of loads of different products, none of the links having the same number as any part number on this item - a tedious search was needed… Even when I found the right link, there was no wiring diagram, just words, nothing like as intuitive as visuals… So, 3 websites later I had instructions and could install. The only nuisance in use is that occasionally the turn-indicator beeper ‘warbles’ unpleasantly and sounds cheap. It’s great value and - subject to these reservations - recommended.
A**N
Find about you vehicle wiring colour codes before you start And what side they are send down
Fitted this to a 04 regVW touran fast post good price. The instructions are a bit poor but YouTube is the way to go it took a good 4 hours but was talking care soldered all the connections. Doesn't come with inline fuse or holder. But I had one anyway. It works but doesn't beep but that could be because am using LED lower resistance . But no dash lights saying there's a problem so all is good. Will try some normal lights one day maybe LEDs needs a resistor.
B**A
Saved the day
I ended up with two distinct wiring faults on my car - caravan brake light circuit. One slightly subtle fault turned out to be the towbar relay . It would hold voltage when testing the brake socket but the lights didn’t work on the caravan when it was plugged in. As we were about to go away I got this nearly identical replacement. After some time tracing all the wires and splicing them back in place in the boot of the car it all worked perfectly. Saved the day and we went away!
S**N
Works as it should, great product!
Simple instructions, with a bit of knowledge easy to install.
Trustpilot
5 days ago
2 days ago