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Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass

Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass

Item # DM5404
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Backup valve installs in trailer brake actuators with high psi ratings and wires into your tow vehicle so that the trailer brakes do not activate when you shift your tow vehicle into reverse. 1-800-496-5010 to order Demco accessories and parts part number DM5404 or order online at Free expert support on all Demco products. Guaranteed Lowest Price and Fastest Shipping for Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass. Accessories and Parts reviews from real customers.
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Demco Accessories and Parts - DM5404

  • Brake Actuator
  • Solenoid Parts
  • Solenoid Kits
  • Demco

Backup valve installs in trailer brake actuators with high psi ratings and wires into your tow vehicle so that the trailer brakes do not activate when you shift your tow vehicle into reverse.


  • Installs in Demco trailer brake actuators to prevent trailer brakes from locking when in reverse
    • Designed for use with Demco DA10, DA16, DA20, and DA91 hydraulic brake actuators
  • Bypass configuration
  • Made in the USA

5404 Demco Solenoid Kit for DA10, DA20, and DA91 Brake Actuators - Bypass

California residents: click here

Video of Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass

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

Video Transcript for Review of Demco Brake Actuator Parts - Solenoid Kit - DM5404

Ellen: Hey, everyone. I'm Ellen here at, and we're going to be taking a look at the Demco Solenoid Kit. This is going to allow you to use the Solenoid to bypass your brake signal whenever you go into reverse. So, it connects into your vehicle's wiring to detect that signal. So, as you're trying to back up with your trailer, the brakes aren't going to engage and prevent you from making those moves. A lot of times, whenever you have the brake actuator put in your trailer, or put on the front of your trailer, it's going to prevent any kind of movement since it's going to sense that backing up motion.So, let's take a look at what comes in the kit.

This is pretty much everything you need to get this installed. You will need a couple of tools, including a 1032nd. 1032 tap and a 532nd-inch drill bit to make some modification to your brake actuator. It's pretty straightforward, but it does require a little bit of drilling to get this installed. So we get our Solenoid, the fittings to go on our configuration here.

Does also come with some instructions to help us get everything installed. Pretty straightforward. It is designed for use with the Demco DA10, the DA20 and the DA91 hydraulic brake actuators. Again, it is a bypass configuration. So, it's going to bypass that reverse signal and help you to get your trailer to back up without any issues from your brake actuator.

That's pretty much all there is to it for our look at the Demco Solenoid Kit. I hope this video has been helpful. Thanks for watching.

Customer Reviews

Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass - DM5404

Average Customer Rating:  4.7 out of 5 stars   (15 Customer Reviews)

Backup valve installs in trailer brake actuators with high psi ratings and wires into your tow vehicle so that the trailer brakes do not activate when you shift your tow vehicle into reverse.


Working as designed to do. Seems if you don’t use often they freeze for some reason. I now keep a battery and leads close by to activate solenoid daily as this is third unit.

It is working, I still activate it daily. I’m converting to EOH.
John - 03/11/2022


Excellent service by phone.


My trailer came with a different brand solenoid that kept failing year after year once my trailer reached about 5 yrs in age. This other solenoid did not have a wired ground so the failure was most likely due to corrosion. The wired ground on the Demco allows you to get a good ground on the exterior of the trailer. The Demco solenoid worked the first time I tried it this spring after sitting outside over the winter.


This reverse lockout solenoid works. the directions for installation are difficult .the picture on the directions are not of this product. The solenoid did not have the in and out ports marked, then the wires are not in the same place as the one in the picture so trying to determine which port is which by comparison is impossible. I had to connect the solenoid a couple of different configurations to see which was the right way. I would not recommend this product to others.


A lot of communication during this sale. Vendor sent me detailed messages throughout the shipping process from manufacturer to distributor to him. I never had to ask, "where is my stuff?"

Good pricing too. So I've bookmarked their site as a one of my trailer parts go-to places for future needs.

Good people.


Received item quickly, price was right. This is the third solenoid for my 2 year old trailer, only change the body part, magnets good.


Just what I needed, and great service


Everything worked out perfectly. Thanks


Easy to mount. Strange it doesn't come with a shield like the other two kits do. Will have to make one to protect the solenoid.


Very easy to install and wire onto the trailer. Thanks for the quick delivery!


Service and selection was great.







See what our Experts say about this Demco Accessories and Parts

  • Comparing Bypass and Non-Bypass Electric Reverse Lockout Solenoids for Surge Couplers
    Demco Solenoid Kit (Bypass) # DM5404, when energized, will only allow the brake fluid to flow back into the master cylinder. A non-bypass, when energized, will just prevent the fluid from flowing anywhere. The type used depends on the master cylinder type on the actuator. To use a bypass type the master cylinder has to have a return port for the fluid to flow back into. A master cylinder without this feature would use a non-bypass. Both thread into the back of the master cylinder directly....
    view full answer...
  • How to Tell if UFP A-160 Actuator Has Manual Lockout
    I am not quite sure what you have on your UFP A-160 actuator but if you check out the attached picture the only way you can manually lock out an actuator is if it has a manual lockout built-in. Technically you can drill a hole in the side of it and place a bolt there to keep the actuator action from happening but this weakens the wall of the actuator and should only be used as a last resort and we don't recommend doing this. You may be able to use a solenoid valve like part # DM5404 but...
    view full answer...
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  • How Many Threaded Ports on Demco Solenoid Kit DM5404
    Demco Solenoid Kit for Brake Actuators with Reverse Lockouts # DM5404 has a total of 3 threaded ports. One from the master cylinder to the solenoid, one from the side of the solenoid back to the master cylinder, and one at the back of the solenoid for the brake line.
    view full answer...
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  • What Pressure Brake Actuators will the Demco Solenoid Kit part # DM5404 Work With
    The Demco Solenoid Kit for Brake Actuators with Reverse Lockouts part # DM5404 will work with both the 1200 PSI actuators for drum brakes and the 1600 PSI actuators for disc brakes.
    view full answer...
  • How Do I Convert A Blocking Type Surge Brake Solenoid To A Bypass Type Solenoid
    In theory, we do have a solution that would turn your blocking solenoid into a bypass solenoid. The Demco Solenoid Kit for Brake Actuators with Reverse Lockouts - Bypass, part # DM5404, is designed just for this reason, to keep your trailer brakes from activating when you shift into reverse. Unfortunately, we cannot guarantee that it will work for your application. If that does not work, there is a slight chance you could swap out the master cylinder, but they are usually fit guided or...
    view full answer...
  • Will Demco Solenoid Kit Allow Titan Model 60 to Back Up Hills
    Based on my research, it looks like the port size should be the same for your Titan Model 60 and the Demco Solenoid Kit for Brake Actuators with Reverse Lockouts # DM5404. As for other pitfalls, not that I can think of, and this will solve the issue of allowing you to back up the hill leading to your garage without your trailer brakes activating.
    view full answer...
  • How Does The Demco Reverse Lockout Solenoid Kit DM5404 Install?
    I checked the instructions for the Demco Solenoid Kit # DM5404 and though it is a little vague, you will want to have the flared inlet attached to the actual brake line and the flat inlet attached to the #6 fitting (which then attaches to the master cylinder). I included an image of what this should look like once installed as well. Should help visualize everything.
    view full answer...
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  • Can Lock Out Solenoid Be Added to Demco Hydraulic Brake Actuator
    I spoke with my contact at Demco regarding the Hydraulic Brake Actuator # DM8759122 referenced in your question. He stated that the Demco Solenoid Kit # DM5404 can indeed be used with this actuator so the trailer brakes do not activate when shifting into reverse This has a gross towing weight capacity of 8,000 pounds and will mount to straight, 3 inch wide trailer tongues. I have attached a short video demonstration on this product for you to check out.
    view full answer...
  • Will Demco Solenoid Kit DM 5404 work with Demco Hydraulic Actuator DM8759933
    The Demco Solenoid Kit for Brake Actuators with Reverse Lockouts # DM5404 is designed to work with DA10, DA20, and DA91 model Demco hydraulic brake actuators. This kit will work with the Demco Hydraulic Brake Actuator # DM8759933 as it is a model DA91 Demco hydraulic actuator.
    view full answer...
  • Electric Reverse Lock Out Solenoid Recommendation for DA91 Demco Actuator
    Yes, all you need to add an electric lockout to your Demco DA91 Actuator part # DM8669113 is the solenoid part # DM5404.
    view full answer...
  • Will Demco Reverse Lockout Solenoid Fit a UFP Actuator
    You could get the Demco lockout solenoid # DM5404 to fit the UFP coupler. But as far as whether or not it is the right type of solenoid is what you need to look at. This one is designed to route brake fluid back into the master cylinder via a second port in the master cylinder. If that is what your UFP has then you could use this solenoid just keep in mind that it has not been tested with other brands. If your actuator does not use the bypass type of solenoid then you would use one like...
    view full answer...
  • Replacement Reverse Lockout Solenoid for Demco Hydraulic Brake Actuator DA10
    Yes, the replacement Demco Solenoid Kit for Brake Actuators # DM5404 that you referenced is designed for Demco DA10 actuators like the Demco Hydraulic Brake Actuator # DM8104311 that you referenced.
    view full answer...
  • Zinc-Plated 8K Demco Channel Trailer Coupler for Disc Brakes with Electric Reverse Lockout
    Demco actuator # DM8759422 comes wither primed or with a zinc coating but as far as a model with the electric lockout already on it we only have the primed version. The zinc version is # DM8758721 and to add the lockout you would just need # DM5404. This will actually end up costing you less!
    view full answer...
  • Reverse Lock Out Solenoid Availability
    Are you talking about the reverse lockout solenoid? We have a couple of those. If you have a Titan actuator you would want part # T4748800, or a Demco part # DM5404.
    view full answer...
  • Reverse Lock Out Solenoids that Fit Demco and Titan Actuators
    Sounds like you are looking for a reverse lockout solenoid. If you have a Titan actuator you would want part # T4748800, or a Demco part # DM5404 which uses bypass routing like you mentioned. I can't recommend you use the Demco on a Titan though.
    view full answer...
  • Troubleshooting Surge Brake Trailer that Locks Up Brakes in Reverse But Solenoid Clicks
    It is very possible the solenoid is defective. Since you hear it click when put in reverse we know it's getting voltage like it needs. You first might try improving the ground of the solenoid though. It's possible it's just not grounding properly to allow it to fully operate. If you have a Titan actuator you would want part # T4748800, or a Demco part # DM5404 for a replacement if you determine you the ground is good. If you have a different brand let me know.
    view full answer...
  • Troubleshooting Titian Actuator with Electric Lockout Not Working When Backing up Driveway
    If your electric lockout solenoid on your Titan actuator isn't engaging when you are backing up your driveway then either the wiring is broken so it isn't receiving the signal or the solenoid has gone bad and it needs replacing. Check the wiring and if it looks good then the solenoid itself it likely the culprit and you would need part # T4748800 for Titan Model 6, Model 60, Aero 7500, and newer Model 10 and Model 20 actuators. If you have a 2000 or older Model 10 actuator, the adapter...
    view full answer...
  • Will Reverse Lockout Solenoid Work When Reversing Truck Uphill
    When using a product such as the Solenoid Valve for Titan Brake Actuators with Reverse Lockouts # T4748800 or Demco Solenoid Kit for Brake Actuators with Reverse Lockouts # DM5404 the trailer brakes do not activate when you shift your tow vehicle into reverse, therefore allowing you to back up a hill or curbs. Even with this solenoid, we recommend reversing up the hill slowly and carefully. We recommend using a solenoid shield, like part # T4836100183, to provide protection to the valve...
    view full answer...
  • How to Determine the Correct Replacement Brake Assembly Size for a 6,000-lb Axle
    You can determine what the correct replacement brake assembly is by measuring the diameter of the brake assembly. This is measured from one brake pad directly across to the other brake pad. This is demonstrated at the 2:05 mark of the attached review video for our Electric Trailer Brake Kit # AKEBRK-7-SA that should be what you are needing for your application. This kit measures 12" x 2" and is compatible with 5.2K to 7K axles. This kit also comes with both the right and left hand assemblies. If...
    view full answer...
  • Surge Trailer Brakes Lock Up when Backing Up on Trailer with Electric Reverse Lockout
    If your 2006 Toyota 4Runner has a 7-Way then the center pin on it should be the reverse light circuit. To test it you will need one other person, a circuit tester such as # 40376, and the vehicle wheels will need to be chocked. Basically you will have the other person sit in the vehicle, start it up, apply the emergency brake, keep their foot on the brake, and put the vehicle in reverse while the wheels are chocked (safety first). Then you can use the circuit tester to test that center...
    view full answer...
  • Will Reverse Electric Lockout Work with a 7- to 5-Way Adapter on a 2012 Honda Pilot
    It sounds like the trailer has a manual reverse lockout feature. This means that you would have to physically go back to the coupler and move a lever or insert a pin to prevent the brakes from engaging when going in reverse. The other type is an electric reverse lockout. This works using a solenoid, such as # T4748800 or # DM5404, attached at the back of the master cylinder on the coupler. It will have a ground wire and a power wire. The power wire is connected to the reverse circuit...
    view full answer...
  • If Surge Brake Actuator is Removed Will Trailer Brakes Still Activate
    If you were to remove the surge brake actuator from your trailer then there wouldn't be any pressure to your hydraulic brakes which means your brakes simply won't activate at all. I recommend installing a reverse lockout solenoid like the Titan # TK71-755-00 or the Demco # DM5404 because it ties in to the reverse light function on your tow vehicle and essentially prevents your actuator from applying pressure to your hydraulic brakes. Keep in mind that you'll need to install a 5-Way flat...
    view full answer...
  • Can Dexter Drum Actuator have Electric Reverse Lock Out Added It
    Dexter doesn't put reverse lock outs on their drum brake actuators so you'd need to add the part # DM5404 do a new actuator. The part # DX97FR is just the inner section of an actuator though. For the actuator you'd need the part # DX33FR.
    view full answer...
  • 4-Way Flat to 4-Way/7-Way Adapter Needed for a 2016 Toyota Highlander
    To convert the 4-Way Flat connector on your 2016 Toyota Highlander to a 7-Way that matches your boat trailer you will need the Universal Wiring Kit # ETBC7. This comes with the 4-Way to 4-Way/7-Way adapter as well as the wiring and other parts needed for a fully functioning 7-Way connector. I do recommend using the no-drill bracket # 18136 as well. Attached is an installation video of the ETBC7 and the Tekonsha Voyager # 39510 being installed on a 2014 Toyota Highlander that you can reference...
    view full answer...
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