Ram 5500 Brake Light Switch Guide for 2011-2018 Models
Solving brake light, cruise control, and shifting problems on your heavy-duty Ram.
- A faulty brake light switch can cause more than just light failure; it can prevent you from shifting out of park and disable cruise control.
- This is a simple and inexpensive DIY repair that usually takes less than 30 minutes with no special tools.
- Be aware of related safety investigations for the 2013-2018 Ram 5500, particularly concerning the brake-shift interlock system.
- When replacing, choose a quality aftermarket brand or an OEM Mopar part to avoid compatibility issues reported with some budget options.
Is Your Ram 5500 Brake Light Switch Failing?
A failing brake light switch on the 2011-2018 Ram 5500 can cause several distinct and frustrating problems. Because this switch communicates with multiple vehicle systems, its failure can be misdiagnosed. Recognizing these symptoms is the first step to a quick and inexpensive repair.
Common Failure Symptoms:
- Brake Lights Don't Work or Stay On: The most obvious sign is your brake lights not illuminating when you press the pedal, or, conversely, staying on constantly and draining your battery.
- Can't Shift Out of Park: Your truck has a safety feature called a brake-shift interlock that requires a signal from the brake light switch to allow the gear selector to move out of Park. If the switch is bad, your truck can get stuck in Park. 🎬 Watch: How to fix a Ram that won't shift out of Park
- Cruise Control Malfunctions: The cruise control system relies on the brake switch to disengage. A faulty switch can prevent the cruise control from setting or cause it to turn off unexpectedly while driving.
- Dashboard Warning Lights: A bad switch can trigger various warning lights, including the ABS, traction control (ESC), and even the check engine light. A common trouble code associated with a failing switch is P0703 (Brake Switch Input Circuit Malfunction). 🎬 See this easy fix for the P0703 trouble code
Important Recalls and Safety Investigations
While no specific recall targets the OEM brake light switch for all 2011-2018 models, owners should be aware of related safety issues:
- Brake Transmission Shift Interlock (BTSI) Investigation: NHTSA has investigated over 1 million 2013-2018 Ram trucks, including the 5500, for an issue where the vehicle could be shifted out of park without pressing the brake, potentially leading to a rollaway. This issue is related to the BTSI solenoid, which works in conjunction with the brake light switch.
- Aftermarket Switch Recall: NHTSA issued a recall (16E001000) for some aftermarket switches sold under the Duralast brand (made by Wells) for 2009-2010 Ram models. The defect could cause brake lights to fail and prevent cruise control from disengaging. While this is for slightly older models, it highlights the importance of quality control in aftermarket parts.
- HCU Recall: Some 2017-2018 Ram 4500/5500 models were recalled (NHTSA 24V-896) for a faulty Hydraulic Control Unit (HCU) that could lead to a loss of ABS and traction control. While not the switch itself, the symptoms can overlap.
Choosing a New Aftermarket Brake Light Switch
When replacing the brake light switch, you have a choice between OEM (Mopar) and several aftermarket brands. For a simple part like this, an aftermarket switch is often a cost-effective solution. However, forum discussions sometimes mention aftermarket switches that fail to work correctly out of the box, requiring a return or exchange.
- Premium Aftermarket (Dorman, Standard Ignition): Brands like Dorman and Standard Ignition are well-known aftermarket manufacturers that produce direct-fit replacement parts. They are generally considered reliable and are a common choice for both DIYers and professional shops.
- Value-Oriented (Crown, and others): Brands like Crown Automotive offer parts that are often more budget-friendly. For a part this critical to safety and vehicle operation, ensure you are buying from a reputable seller with a good return policy.
- OEM Mopar: The original Mopar part is a guaranteed fit and is made to the factory specifications. While it costs more, it provides peace of mind, eliminating any guesswork about quality or compatibility.
Pro Tip: The brake light switch is considered a one-time-use part by some mechanics. Once installed, its internal plunger self-adjusts to the pedal's position. Removing and reinstalling an old switch may cause it to fail or function incorrectly. Given the low cost of a new part, replacement is always the best option.
Cost Comparison for Ram 5500 Brake Light Switch
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $21.14 - $42.32 |
| New OEM (Mopar) | $40.00 - $60.00 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions (FAQ)
Can I replace the brake light switch myself?
Yes, this is a very DIY-friendly repair. The switch is located on the brake pedal assembly under the dashboard. The process typically involves disconnecting the electrical connector, twisting the switch counter-clockwise to remove it, and then installing the new one by reversing the steps. No special tools are usually required, though a pry tool might help with the connector. The entire job can often be done in under 30 minutes.
Do I need to calibrate the new switch?
The switch is designed to self-calibrate. When installing the new switch, you may need to hold the brake pedal down slightly. Once the switch is locked in place, releasing the pedal allows the plunger to set to the correct depth. It's important not to pull up on the brake pedal after installation, as this can damage the new switch.
🎬 Watch: How to properly calibrate your new Mopar brake switchShould I buy an OEM or Aftermarket switch?
For this part, either can be a good choice. An OEM Mopar switch guarantees perfect compatibility but costs more. Reputable aftermarket brands like Dorman or Standard Ignition offer a good balance of quality and price. Some owners have reported issues with budget-friendly online parts, so if you choose a value brand, buy from a source with a reliable warranty and return policy.
My brake lights work, but I can't shift out of park. Could it still be the switch?
Yes, it's possible. The brake light switch often has multiple internal contacts and circuits—one for the lights and another for the shift interlock and cruise control. One circuit can fail while the other still works. Given the low cost of the part, it's a common first step in diagnosing a shift interlock problem.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4671336AD 56038914AA 68078700AE
Typically a 6-pin, twist-in switch located on the brake pedal support bracket.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ram 5500: