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Wiring Kit for Hydrastar Electric Over Hydraulic Actuators

Wiring Kit for Hydrastar Electric Over Hydraulic Actuators

Item # HS381-9000
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This kit contains everything you need to prepare your Hydrastar electric-hydraulic actuator to be plugged into your vehicle-end trailer connector. Includes 7-way RV-style trailer connector, junction box, split wire loom, mounting pads, and hardware. 1-833-496-1390 to order Hydrastar accessories and parts part number HS381-9000 or order online at Free expert support on all Hydrastar products. Guaranteed Lowest Price and Fastest Shipping for Wiring Kit for Hydrastar Electric Over Hydraulic Actuators. Accessories and Parts reviews from real customers.
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  • Reviews (5)
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Hydrastar Accessories and Parts - HS381-9000

  • Brake Actuator
  • Installation Kit
  • Hydrastar

This kit contains everything you need to prepare your Hydrastar electric-hydraulic actuator to be plugged into your vehicle-end trailer connector. Includes 7-way RV-style trailer connector, junction box, split wire loom, mounting pads, and hardware.


  • Kit allows you to wire your Hydrastar electric-over-hydraulic actuator so that you can plug it into your vehicle's trailer connector
  • Heavy-duty, 7-way, RV-style trailer connector is insulated and molded to protect terminals and wires
  • Weatherproof, corrosion-resistant 7-pole junction box protects wires, eases installation, and makes diagnostics simple
    • Ring terminals and butt connectors included for connecting wiring
  • Split wire loom protects wiring from the elements and allows wires in and out along any point of the loom for easy installation
  • Mounting pads have adhesive backing for securing cable ties
  • Mounting hardware is included


  • Junction box dimensions: 6-3/4" long x 3-1/2" wide x 2-1/4" tall
  • Trailer connector length: 5'
  • Trailer connector wire gauges:
    • Black/white: 10 gauge
    • Blue: 12 gauge
    • Brown/red/green/yellow: 14 gauge
  • Wire loom length: 6'

381-9000 Hydra Star Trailer Brake Actuator Installation Kit - Model HBA-IST

Customer Reviews

Wiring Kit for Hydrastar Electric Over Hydraulic Actuators - HS381-9000

Average Customer Rating:  4.2 out of 5 stars   (5 Customer Reviews)

This kit contains everything you need to prepare your Hydrastar electric-hydraulic actuator to be plugged into your vehicle-end trailer connector. Includes 7-way RV-style trailer connector, junction box, split wire loom, mounting pads, and hardware.


this product help keep all things in order and I have not had any issues with wiring

I had to upgrade my fifth wheel to a motorhome do to my wifes disability how ever every thing worked out just fine fo the short time I used it.
Roy - 01/22/2018


Would not recommend this package at all. The main cable (vehicle 7 prong cable) had all the wires miss attached, IE the brown was not the running light but the constant, yellow was constant etc, the only wire hooked up correctly was the white ground.

So during installation I assumed the harness would be correct, hooked up to my truck and not have a massive short in my truck due to the improper back feeding and drain. I had to bring another vehicle up and trace every wire individually with a test light to wire the trailer correctly. Good news, after 5 hours I was able to rewire my trailer, bad news I no longer have a truck to tow it with due to the short. I can not even begin to imagine the undertaking of now having to find the short in my truck.

Would recommend against purchasing this product at all costs, you're better off building one on your own harness which I guess I should have done!


I can't say enough good things about the staff at etrailer. They helped me pick out the correct items to install disc brakes on my boat trailer and the technical staff was extremely helpful in helping me better understand how to perform the installation. This was the first time I ever install a new brake system and their help enabled me to easily and successfully complete the installation. A+ for the product quality and for etrailer staff!


Everything I have purchased from you had been the highest of quality. Very quick delivery. I rebuilt my boat trailer with your part and I couldn't be happier




See what our Experts say about this Hydrastar Accessories and Parts

  • Will Factory Brake Controller 2015 Ford F150 Work w/ HBA-12 Electric Over Hydraulic Brake Actuator
    The OEM brake controller on a 2015 Ford F150 is compatible with the Hydrastar Electric Over Hydraulic Brake Actuator, part # HBA-12. A wiring kit like # HS381-9000 would be an excellent addition. Many different break away kits would work, but I like the # 34-285 from Dexter Axle because it provides a 9 amp/hour battery, almost twice as powerful as what's seen from the 5 amp/hour batteries provided with other break away systems.
    view full answer...
  • Parts Needed to Use the Kodiak Disc Brakes on a Trailer or Motorhome
    For your Kodiak Disc Brakes, part # K2HR858D, you do in fact need a hydraulic actuator and lines. The HydraStar Vented Marine Electric Over Hydraulic Actuator, part # HS381-8067, is a decent choice. However, I recommend part # HBA16-252-82 instead as this one comes with the lines needed to connect to the brakes. I've linked to a video installation of this actuator and lines for you to reference. When it comes to wiring in the actuator, I highly recommend using the Wiring Kit for HydraStar...
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  • Converting From Electric to Electric over Hydraulic Disc Brakes on Two 7,200 lb Dexter Torflex Axles
    Thanks for the info and we have all the parts you are going to need to convert from electric to electric-over-hydraulic disk brakes, which is the best braking system you can have for a trailer (most stopping power combined with the best overall control). A Dexter Torflex 7,200 lb torsion axle uses inner bearing # 25580, outer bearing # 02475 and grease seal # GS-2250DL. That info, along with the 8 on 6-1/2" bolt pattern, is all we need to know to get you the right set up, and I'll recommend...
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  • Best Electric Over Hydraulic Actuator for Trailer With Drum Brakes and 9,000 lb Axles
    The best electric-over-hydraulic brake actuator for you, on a trailer with electric over hydraulic drum brakes and 9,000 lb axles, is the HydraStar Electric Over Hydraulic Actuator for Drum Brakes # HBA-12. We have found this to be the most reliable EOH actuator and it is designed to work with trailers with drum brakes that are 8,000 lbs or larger. The difference between this and the Hydrastar XL Electric-Hydraulic Brake Actuator # HBAC10-CLR is the fact that this unit comes with a brake...
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  • Can OEM Brake Controller on 2011 Ford F-350 be Used with Electric Over Hydraulic Actuator
    The OEM controller in your 2011 Ford F-350 is actually very similar to the Tekonsha Prodigy brake controllers so you wouldn't need to add an aftermarket controller unless you absolutely wanted to. There should be a setting for electric over hydraulic (EOH) brakes that you choose for this. If you do decide to use an aftermarket then I highly recommend the Prodigy P2 # 90885 because you will already be somewhat familiar with how to use it. All you need to complete the installation is the...
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  • Recommended Disc Brake Conversion Kit for 5200-lbs Lippert Axles with 6 on 5-1/2 Bolt Pattern
    I was able to check with Lippert to get confirmation on the specs of your V000408984 axle, which are 5200-lbs axles with 6 on 5-1/2" bolt pattern hubs. This will give you 2 different options you can use depending on the quality of corrosion resistance you're looking for. The first option is the Kodiak Disc Brake Kit # K2HR526D, which is a confirmed fit with the hubs and spindle that came on the V000408984 axle. This disc brake kit is dacromet plated to provide you with good corrosion...
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  • Parts Needed to Change Electric Brakes on a Tandem Axle Trailer to Electric-Over-Hydraulic Disc
    For a disc brake assembly I recommend going with the Kodiak Disc Brake Assembly # K2HR712DS for 1/2" diameter studs or Kit # K2HRCM1337-9DAC for 9/16" diameter studs. Both of these kits are for 7,000 lb trailer axles. For the inner bearing use part # 25580, outer bearing use part # 02475, and grease seal use part # RG06-070. If you have two 3,500 lb axles on your trailers I recommend the Titan Disc Brake Assembly # T10HREKITBB (2 for each axle) which comes with inner bearing # L68149,...
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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Leah S
Edited by:
Leah S
Employee Wilson B
Updated by:
Wilson B
Employee Manda E
Updated by:
Manda E
Employee Amanda M
Written by:
Amanda M

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