Maypole 12N 7 Pin Car Tester MP1804B

12N 7 Pin Car And Trailer Tester


  • 12N 7 Pin car and trailer tester for testing ISO1724 /12N 7pin circuits
  • LED indicators show any faults on the towbar or trailer lighting circuits
  • Requires 1 x 9V PP3 battery (not included) for testing trailer lighting
  • Note: Not suitable for use with LED trailer lights
  • Towbar testing requires ignition to be switched on and each function activated in turn
  • Indicators will show green when function is tested and correctly wired, or red if a fault is present

Tow Bar Testing

  • Plug the tester (“Towbar Check” connection) into the 7 pin towing socket
  •  Switch on the ignition and test each lighting function in turn
  • LED indicators will show Red when the function tested is correctly wired

Trailer Testing

  • Not suitable for use with LED trailer lights
  • Insert a PP9 – 9V battery (not included) observing correct polarity
  • Insert the 7 pin trailer plug into the tester (“Trailer Check” connection)
  • Press the “Trailer Check” test button on the side of the tester
  • LED indicators will show Red when the function tested is correctly wired
  • If the LEDs do not light up check the internal battery.
  • If individual LEDs still do not light up, check the plug wiring against ISO1724 – some lighting circuits may not be connected in all installations.
  • Finally, make further checks of bulbs and contacts if necessary


Speedyparts Direct Ltd
Speedyparts Direct Ltd
139 Google reviews
Jimbo Jambo
Jimbo Jambo
Got a number plate within minutes.
Joe Mannix
Joe Mannix
top lads first class service
James Wims
James Wims
Great service - highly recommended.
Daniel Hogan
Daniel Hogan
Very helpful and knowledgeable staff.

Here at Speedyparts, we work with Fastway Couriers for all our website orders

Fastway is Fast & effective and helps us ensure that your order is delivered to you quickly & securely. The vast majority of our orders are delivered on the next business day after ordering

Delivery & Collections

When placing your order you can choose between delivery and for local orders we offer a Click & Collect option.

Order Cut-Off Time

Orders placed after the cut-off time of 3 pm will be processed the following business day. All orders received before 3pm will be delivered the next day.

Bank/ Public Holidays

No deliveries will be made on Bank/ Public Holidays. Delivery times will vary for items that are not in stock – we will contact you to let you know how long it will take.

Delivery times

Ireland (Including Northern Ireland) For orders received before 3 pm –  Next Business Day


You will receive Tracking information for your delivery by email when your order has been processed

Delivery Charges

For most orders, the delivery charge will be €7 the exception is for heavy items (Car Batteries) which are charged at €7 each or €14  for 2

We offer Free Delivery For all Orders above €150!*

This will be automatically applied to your order at the checkout.

*Due to the great value we offer, all Car and tractor batteries are excluded from free shipping

Risk-free shopping! I you are in any way unhappy with the item you have purchased all you need to do is contact us before you return your goods and we will guide you through the process to make everything as quick and easy as possible, as long as the item is in perfect condition in the original packaging we will arrange a full refund as soon as we receive it. 

No Hassle Returns

We like to keep things simple so that every purchase you make with Speedyparts is completely risk free. If you’re not satisfied with an item that you have purchased and the item is unused and hasn’t been fitted, you can return it to us within 30 days* of purchase for a refund. P All you need to do is contact us before you return your goods and we will guide you through the process to make everything as quick and easy as possible.

Making A Return

Please contact Speedypart by emailing or by calling +353(44) 9342533 and we’ll guide you through the returns process to make it as fast and as easy as possible.

To ensure a full refund, the item to be returned needs to be unused, and must have its original packaging undamaged and intact.

Sending A Return

To return your order within 30 days of purchase, the item(s) must be unused, in its original condition and packaging with all materials, manuals and accessories intact. Pack up your item(s) protectively and write your Returns Number clearly on the outside of the package.

To guarantee delivery, we’d recommend that you send back your return using a tracked service.