This Maypole MP31 12S 7 Pin Plastic Socket is a 12V 'S' type 7-pin plastic socket, ideal for carav...This Maypole MP31 12S 7 Pin Plastic Socket is a 12V 'S' type 7-pin plastic socket, ideal for caravans. It features a plastic body with brass pins and screw terminals. The socket is designed to conform to ISO 3732 and is display packed for retail use. Please consult your caravan dealer or auto electrician if you are unsure about your caravan or trailer wiring. Maypole Ltd is a leading supplier to the Leisure, Trailer, Automotive, Agricultural and Marine trade sectors, and is the UK's number 1 name in towing and touring.
This guide is for caravan owners and trailer users needing a reliable 12V 'S' type 7-pin plastic socket. The Maypole MP31 offers a durable plastic body with brass pins, ensuring a secure connection for your towing electrics. A key benefit is its compliance with ISO 3732 standards for safe operation. One caveat is the need to consult a professional if you are unsure about your vehicle's wiring.
All features
Model Part Number
031
Brand
Maypole
Extended Product Information
FAQs
What does '12S' type mean?
'12S' refers to a 12-volt 'Secondary' system socket, commonly used for caravans, providing power for functions beyond basic lighting, such as interior lights or charging circuits.
Can I use this with a 13-pin trailer plug?
No, this is a 7-pin socket and is not directly compatible with a 13-pin plug. You would need a 13-pin socket on your vehicle or an adapter.
How do I know if my trailer needs an 'S' type socket?
Most modern caravans and many larger trailers use 'S' type (secondary) plugs for additional electrical functions. If your trailer has interior lights or a battery charging system, it likely requires an 'S' type connection.
What is the advantage of brass pins?
Brass offers excellent electrical conductivity and is resistant to corrosion, ensuring a reliable and long-lasting connection compared to some other materials.
Is professional installation necessary?
While wiring can be done by knowledgeable individuals, it is strongly recommended to consult a caravan dealer or auto electrician if you are unsure about your vehicle's wiring to ensure correct and safe installation.
How often should I check the connections?
It's good practice to check connections at least annually or before long journeys, especially if you've experienced any electrical issues.
Troubleshooting
No power to trailer lights
Check all wiring connections at the socket and vehicle. Ensure the trailer plug is fully inserted. Verify the vehicle's towing electrics fuse is intact. Consult an auto electrician if unsure.
Intermittent light function
Inspect the pins and socket for dirt or corrosion. Ensure screw terminals are tight. Check the wiring continuity.
Socket cracked or damaged
Replace the socket immediately to ensure a safe electrical connection. Refer to installation guides or consult a professional for replacement.
Pros and Cons
Pros
Compliant with ISO 3732 standards for reliable performance.
Durable construction with a plastic body and brass pins for longevity.
Easy to wire thanks to screw terminals.
Suitable for a wide range of 12V caravan and trailer applications.
Cons
Requires user knowledge or professional installation for wiring.
Plastic construction may be less robust than metal alternatives in extreme conditions.
Specific 'S' type designation means it's not universally compatible with all older trailer plugs.
Setup, Compatibility & Care
Setup:
Wiring: Connect the appropriate wires from your towing vehicle's electrical system to the corresponding screw terminals on the back of the socket. Ensure each wire is securely fastened.
Mounting: Mount the socket securely to the vehicle's towing bracket or designated area, ensuring it is accessible for connecting the trailer or caravan plug.
Compatibility:
This is a 12V 'S' type 7-pin socket. It is designed to connect with a corresponding 7-pin 'S' type plug typically found on caravans and trailers.
Consult your caravan dealer or an auto electrician if you are uncertain about your specific vehicle or trailer wiring requirements. Incorrect wiring can lead to electrical faults or safety issues.
Care:
Keep clean: Periodically clean the exterior of the socket and the pins with a dry or slightly damp cloth to remove dirt and debris.
Check connections: Regularly inspect the screw terminals to ensure they remain tight and free from corrosion.
Protect from elements: While designed for outdoor use, avoid prolonged exposure to harsh weather conditions or submersion in water.