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Bestop Wiring Harness for Rear Defroster/Wiper for Jeep Wrangler Soft Top

Bestop Wiring Harness for Rear Defroster/Wiper for Jeep Wrangler Soft Top

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Accessories and Parts BE99FR - Rear Defroster - Bestop
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Wiring bundle allows you to connect your rear window defroster and wiper motor assembly to the electrical system of your Jeep Wrangler with factory soft top. Optional accessory for Bestop Trektop Pro. Defroster and and wiper assembly sold separately. 1-833-496-1390 to order Bestop accessories and parts part number BE99FR or order online at Free expert support on all Bestop products. Guaranteed Lowest Price and Fastest Shipping for Bestop Wiring Harness for Rear Defroster/Wiper for Jeep Wrangler Soft Top. Accessories and Parts reviews from real customers.
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Bestop Accessories and Parts

  • Jeep Tops
  • Jeep Windows
  • Wiring
  • Rear Defroster
  • Bestop

Wiring bundle allows you to connect your rear window defroster and wiper motor assembly to the electrical system of your Jeep Wrangler with factory soft top. Optional accessory for Bestop Trektop Pro. Defroster and and wiper assembly sold separately.


  • Wiring bundle connects rear window wiper motor and defroster for the Trektop Pro to the electrical system of your Jeep Wrangler JK
  • Required to use defroster and optional wiper on Trektop Pro installed on Jeep with factory soft top
    • 2007-18 Wrangler JK with factory hard tops already have this harness
  • Built to same specification as factory harness for proper length and function
  • 1-year warranty

54857-01 Bestop Rear Defroster and Wiper Wiring Harness forTrektop Pro - Soft Top

Item # BE99FR

Installation Details BE99FR Installation instructions

California residents: click here

Video of Bestop Wiring Harness for Rear Defroster/Wiper for Jeep Wrangler Soft Top

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

Video Transcript for Review of Bestop Jeep Top Parts - Wiring Harness for Rear Window - BE99FR

Ellen: Hey everyone. I'm Ellen here at Today, we're taking a quick look at the best top wiring harness. This is for those situations where you have the Trektop Pro, but your Jeep Wrangler JK originally came with a soft top. So it won't have this wiring harness in there. And if you want to be able to use that rear wiper blade on that rear window, and also the defroster, you would need this harness.

If your Jeep Wrangler JK was a hard top from the factory, this should already be installed. You shouldn't have to worry about getting anything else, it should already be there. But if yours came with that soft top, that's why you're here.So we'll get two harnesses. This is going to be harness A, it's going to have the three connections that are going to go onto the switch that comes with it. And then this is going to be harness B.

This one is going to be the power and ground for our systems. So this goes to the battery. It's got a black wire and a red, or kind of orange wire, with a fuse in line. And the black wire is going to go to the ground connection on our battery or another good factory ground stud. And the red wire is going to go to the positive side of our battery or another power source, like a fuse that you want to run it that way.It is, again, fuse protected.

So there's a fuse in line with this harness. Comes with a 25 amp fuse already in place. So that's one less thing to have to pick up to yourself. Also comes with some zip ties and the switch to turn that function on and off. You want to be sure that whenever you're using this, since this does run directly to the battery, and that's how it's designed to be used, you do need to turn this off whenever you turn off the car.

If you don't, it can run down your battery because it is going to be powered directly off of that. So something to keep in mind there.We take a little closer look at each wiring harness. They're going to be housed in this braided loom. So that's going to keep the wiring harness protected as you run it along. This harness should be pretty much ran under the threshold along the driver side of your Jeep. So it has instructions on how to pull up the thresholds as you go along. Pretty good instructions with some pictures, kind of look like the silent Ikea style instructions, but they do a pretty good job of going step by step on what you need to do. As far as tools that you'll need to get this installed, you will need a one inch hole saw and a seven millimeter socket or a 14 or one quarter inch drive socket, and then a couple other tools.So has that lined out in the instructions for you, makes it pretty easy. It's going to be kind of a mid-level skill level for getting this installed. The really the scariest part of it is going to be drilling that hole out in your dash for the switch. That's where you're going to need that one inch hole saw. Other than that, it's pretty much just popping up some panels and running that wire along and then zip tying as you go. They do give you 14 smallish zip ties with the kit. So it helps you to keep that wire cinched up and together and out of the way of any kind of clips and anything like that.The B harness or the harness going into the battery, does need to go through a factory grommet through the firewall and your engine bay. Again, the instructions have a pretty good diagram of where you can find that. Should already have a slit in it, but you might need a utility knife to cut an X in there, cut a hole to get that passed through. One thing that I would maybe add in with that since you're making a hole in a grommet, it would be a little silicone sealant to seal up that hole once you're done. You can find silicone here at It'd be the silicone gasket maker. If you search for that, you should be able to find it. And should get you out on the road. Kind of an optional thing, but just to keep any fumes or anything like that from getting into your engine or getting into your vehicle. It's kind of a nice thing to have.Everything else should clip in with your wiring on the rest of your Trektop Pro, and should allow you to use that defroster and your rear wiper blade. Again, you want to make sure you turn off the power of this whenever you turn off your vehicle, that way you don't drain your battery. But that's pretty much going to do it for our look at the best top wiring harness for your defroster and wiper on your Jeep Wrangler JK. Hope this video has been helpful. Thanks for watching.


See what our Experts say about this Bestop Accessories and Parts

  • How Does the Bestop Wiring Harness Turn on the Rear Wiper on a Trektop Pro on a 2008 Jeep JK
    The Bestop Wiring Harness for Rear Defroster/Wiper for Jeep Wrangler Soft Top # BE99FR you are asking about connects your 2008 Jeep Wrangler JK's wiring to the Bestop Rear Window Wiper Motor Assembly for Trektop Pro # BE49FR, which is designed for use with the Bestop Trektop Pro replacement tops. Like the Bestop Trektop Pro Hybrid Soft Top # B54862-70 for the 2 door version or the Bestop Trektop Pro Hybrid Soft Top # B54863-70 for the 4 door version. I have included the installation instructions...
    view full answer...

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Info for this part was:

Employee Kathleen M
Installed by:
Kathleen M
Employee Wilson B
Updated by:
Wilson B
Employee Daron K
Edited by:
Daron K
Employee Matthew E
Written by:
Matthew E

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