Ram 3500 Trailer Brake Low Voltage

The Ram 3500 Trailer Brake Low Voltage warning is a safety alert that occurs when the trailer brake control unit detects low voltage in the trailer brakes. This could be caused by an issue with the connection between the trailer and tow vehicle or from wiring issues on either side of this connection. In order to fix this, it is important to first check all connections for any debris or corrosion that may prevent proper contact.

Additionally, inspect all wires for damage such as breaks, frays, etc., and replace them if necessary. Finally, test both the tow vehicle’s electrical system and the trailer’s wiring harness to ensure they are both properly functioning before attempting any further diagnosis.

When it comes to hauling a heavy load, having a properly functioning trailer brake system is essential for safety and efficiency. Unfortunately, one common issue that can arise with this system is low voltage in the trailer brakes of your Ram 3500. This can be caused by several factors such as corrosion on the wiring or connections, worn out components in the braking system, or even an incorrect setting on the controller.

If you find yourself dealing with this issue, it’s important to take steps to fix it right away so you can keep your vehicle safe while driving down the road.

What Causes Low Voltage on Trailer Brakes?

One of the most common causes of low voltage on trailer brakes is poor connection between the truck and trailer. This can occur due to corrosion, dirt or debris build-up in the connection points, or a broken wire in the wiring harness. Another cause could be worn out brake pads on the trailer itself that are not able to effectively press against the drums or rotors.

In some cases, an incorrect adjustment of either foot pedal free play or parking brake cable tension can lead to low voltage at the trailer brakes. Lastly, if too large a current draw is placed on one side of a system by one axle group all together, it will result in insufficient power for both sides; thus resulting in weak braking performance from both axles. It’s important to maintain proper connections and inspect your brakes regularly so you don’t have any unexpected issues while hauling cargo down highways and roads!

How Many Volts Should Be Going to My Trailer Brakes?

When it comes to your trailer brakes, the amount of voltage they should receive is a critical factor in keeping them functioning properly. The amount of voltage needed depends on several factors such as the type and size of trailer being towed. Generally speaking, most trailers require somewhere between 12-14 volts to have their brakes working optimally.

To be sure you are getting the correct voltage for your particular setup, consult with an experienced technician who can take into account all of the variables involved and provide an accurate assessment. Additionally, make sure that any electrical components used with your trailer are compatible with the brake system you are using (7-way or 4-way) so no damage is done due to incompatibility issues. Taking these necessary steps will help ensure that when you hit the road with your trailer in tow, its brakes will be able to handle whatever situation may arise safely and efficiently!

Why am I Only Getting 8 Volts to My Trailer Brakes?

There are several potential causes for why you may only be receiving 8 volts to your trailer brakes. The most common is a bad or weak connection between the tow vehicle and the trailer, as this can reduce voltage output. It’s also possible that there is an issue with the wiring on either side of the connection or that one of the components such as a fuse, relay switch, or brake controller has failed.

Additionally, if you have recently increased your trailer’s weight capacity without upgrading its braking system accordingly then it could lead to decreased power output due to too much current being drawn from the battery. To fix this issue you should check all connections between both vehicles and replace any faulty parts before continuing to use them. If necessary, contact a professional mechanic who can help diagnose and repair any underlying problems that might exist in order to ensure optimal performance when using your trailer brakes.

Why am I Only Getting 9 Volts to My Trailer Brakes?

If you are experiencing problems with your trailer brakes not receiving the full 12 volts they should, it is likely due to a faulty wiring connection or broken wire. To start troubleshooting, disconnect the electrical supply from the tow vehicle and inspect all connections and wires for any signs of corrosion or damage. If everything appears to be in good condition, check each wire individually with a multimeter set at 12 volts AC.

Make sure that there are no shorts between any of the wires as this can cause an insufficient voltage drop and result in only 9 volts being delivered to your trailer brakes. If you find that one of the wires has sustained damage, replace it immediately for optimal performance and safety. Additionally, if some parts seem worn out or damaged such as corroded terminals or loose connections then these should also be replaced before attempting to use your trailer’s braking system again.

2020 Ram 3500 Trailer Brake Controller

The 2020 Ram 3500 is equipped with a powerful trailer brake controller, designed to provide maximum braking power and safety while hauling heavy loads. This system features an adjustable output level that allows you to customize the amount of braking force applied to your trailer brakes, as well as a range of other features such as auto-calibration and manual override controls. With this technology at your disposal, you can rest assured knowing that your trailer is always safely in check.

2019 Ram 3500 Trailer Brake Controller

The 2019 Ram 3500 is equipped with a trailer brake controller that provides added control and safety when towing. The system allows you to adjust the amount of force applied to the brakes on your trailer, giving you better control over stopping power and allowing for smoother braking in all conditions. It is also equipped with an advanced monitoring system that keeps track of brake performance so you can be sure it’s working optimally at all times.


In conclusion, it is important to make sure that the trailer brake system on your Ram 3500 is functioning properly. If there is an issue with low voltage, this can affect the overall performance of the brakes and cause safety issues when driving. It is best to check for any signs of low voltage and replace components if necessary in order to keep your braking system running optimally.

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