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RoadMaster 12-Volt Extension Cord

RoadMaster 12-Volt Extension Cord

Item # RM-9331
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Roadmaster Extension Cord - RM-9331
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This extension cord plugs into your vehicle's cigarette lighter or power supply outlet and extends access to that 12-volt power supply up to 6', accommodating many of your accessory needs. Call 800-298-1624 to order Roadmaster 12v power accessories part number RM-9331 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for RoadMaster 12-Volt Extension Cord. 12V Power Accessories reviews from real customers.
  • All Info
  • Reviews (4)
  • Q & A (3)
  • Videos (1)
  • Photos
  • Why etrailer?

Roadmaster 12V Power Accessories - RM-9331

  • Extension Cord
  • Roadmaster

This extension cord plugs into your vehicle's cigarette lighter or power supply outlet and extends access to that 12-volt power supply up to 6', accommodating many of your accessory needs.


  • Extends your vehicle's 12-volt outlet by 6'
  • Works great with RoadMaster Even Brake and 9700 braking systems
  • Made in the USA


  • Power: 12 volts
  • Cord length: 6'

9331 RoadMaster 12-Volt Extension Cord

Video of RoadMaster 12-Volt Extension Cord

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Roadmaster 12 Volt Extension Cord Review

Today, we're going to be taking a look at the RoadMaster 12-volt DC extension cord. This is part number RM-9331. This is a 6 foot extension designed to plug right into a standard 12 volt DC outlet. As you can see, we've got a small red LED light in there. It's going to indicate that we've got power. Then, then it's going to give us the room we need.

In our case, today, we're going to show you working on an air compressor. We'll bring out our end. We can then extend it on out, connect it into our air compressor. As you'll see, we'll still have the room we need to get it connected onto our tire here. This can also be good for attaching it to other vehicles, if you need a little extension room or a little more room to get out there. As you can see, it's going to supply us with the power we need to power our tools outside the vehicle. Now, these can also be used to run power maybe up to the front of the car where we've got a small light to operate or maybe we're out somewhere, we want to watch a small TV or portable DVD player. We can take this wherever around the vehicle that we like and put it to good use. Now that you've seen what it is and how it works, that will complete today's look at the RoadMaster 6 foot 12-volt DC extension cord, part number RM-9331.


Customer Reviews

RoadMaster 12-Volt Extension Cord - RM-9331

Average Customer Rating:  4.8 out of 5 stars   (4 Customer Reviews)

This extension cord plugs into your vehicle's cigarette lighter or power supply outlet and extends access to that 12-volt power supply up to 6', accommodating many of your accessory needs.

- RM-9331

Simple device. Is was it is. Could maybe be just a tad longer.

- RM-9331

Perfect length to have my brake buddy reach rear outlet

- RM-9331

Great product, does exactly what it was designed to do.

- RM-9331


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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Leah B
Edited By:
Leah B

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