Radio Code Explained
The security code is a built-in numeric code that keeps your stereo secure.
It is stored within the radio at the factory and activates automatically whenever the unit is disconnected.
If the correct code is not entered, the radio remains disabled and cannot be operated.
Entering the code tells the radio that it is still in the original vehicle, restoring normal operation immediately.
Common Ram 4500 Radio Code Issues
Dealing with a locked Ram 4500 radio? In most cases, it was triggered by one of these well-known situations.
Problems After a Battery Replacement
When the battery is removed, the Ram 4500 radio locks automatically.
This factory protection system is designed to prevent theft by disabling the radio after electrical reset.
Other Situations That Trigger PIN Code
- Software updates may trigger the anti-theft mode on some Ram 4500 units.
- Replacing the head unit with a second-hand one requires the code for that particular radio.
- A power surge can reset the radio and prompt for a code.
- Even a quick battery boost can activate the anti-theft lock.
Things to Try First
Before you pay for it, it's worth checking a few places where the code is often already written down.
Some owners find their Ram 4500 radio code without needing any tools or paperwork.
Here are the most common things to check first.
Search the Vehicle Interior
- On the radio unit itself, if it was removed before.
- In the spare wheel area, on a radio label.
- In the vehicle handbook, often on a sticker page.
- In your maintenance booklet from the previous owner.
- Inside the glovebox, sometimes on a small card.
Dealer Retrieval Option
Dealerships can retrieve your radio code by checking the VIN in their system.
They typically ask for registration and ID before sharing the security PIN.
This is the official way to restore access to the factory radio.
Potential Downsides:
- You may need to contact service support during business hours.
- Dealers frequently bill for the code (It may cost more than 100$).
- Some imported or older radios may need extra verification.
- The lookup is often not instant and may require waiting.
Finding the Serial N. on a 4500's Radio
To generate the correct radio code, you will need the serial number from your Ram 4500's head unit.
You may be able to find it directly on the screen. Common labels to look for: S/N, SN, Serial, Serial Number.
1. Viewing 4500's S/N on the Display
Most Uconnect-equipped vehicles are able to show the radio serial number right on the display using a hidden diagnostic menu called Dealer Mode (also known as Engineering Mode). This means you can get the serial number without removing the radio from the dashboard.
Uconnect 8.4" Classic (2013–2018)
Method 1 – Climate Controls:
- Turn the ignition to ACC or ON (engine off).
- Simultaneously hold the Up, Down, and Front Defrost climate buttons for 5 seconds.
- The Dealer Mode menu will appear on screen.
- Navigate to: System Info → Radio Part Info → Serial Number.
Method 2 – Temperature Buttons:
- Hold the Temperature Up (red) and Temperature Down (blue) buttons together for 5 seconds.
- The Engineering Menu appears.
- Navigate to: System Info → Radio Part Info → Serial Number.
Uconnect 8.4" NEW (2019+) & 12-inch
- Turn the ignition to ACC or ON.
- Press the bottom-left and bottom-right edges of the physical screen bezel simultaneously until Dealer Mode appears.
- Navigate to: System Info → Radio Part Info → Serial Number.
Important Press the physical bezel edges, not the touchscreen surface.
Uconnect 7" (e.g. Jeep Compass)
- Hold the Temperature Up and Temperature Down buttons for 5 seconds.
- The Engineering Menu appears.
- Navigate to: System Info → Target Main Data → Serial Number.
2. Locating the S/N on the Radio Body
The serial number is usually located on a label attached to the radio casing.
Step 1: Turn off the the ignition.
Step 2: After that, take off the surrounding panel.
Step 3: Then release the mounting clips.
Step 4: Carefully slide the unit out partially (Be careful not to damage the cables).
Step 5: Search for the serial on the rear of the unit.
Step 6: Write down the full Serial Number carefully and come back here so that we can generate the code.
Important: Don't mix the Serial Number and the Part Number!
Physical Radio Removal (if Dealer Mode is unavailable)
If the on-screen method does not work on your vehicle, the radio can be physically removed to view the serial number label on the top, side, or back of the unit:
- Remove the trim bezel – Gently remove the dashboard trim surrounding the radio using a plastic trim removal tool. The bezel is held by friction clips.
- Unscrew the mounting bolts – Remove the 4 mounting screws (usually Torx or Phillips) securing the radio to the dash frame.
- Slide the unit forward – Gently pull the radio out far enough to see the label. Do not disconnect the wiring harness unless necessary.
- Locate the serial number label – Look for a white or silver sticker with a barcode on the top or side of the unit. The serial number is a 14-character alphanumeric code (e.g.
T00AM394958584).
For detailed instructions with video tutorials for specific vehicles, see our Uconnect radio removal guide.
Example: Ram 4500 serial number label location
Common Serial Letters and Numbers on Ram 4500 Radios
To unlock your radio, find the serial starting with T00AM, TM9, or A2C. Do NOT use serials ending in W, J, L, or S — those are screen/DVD/amplifier modules.
How to Enter the Radio Code on Ram 4500
Once you have the unlock code, it's time to enter it into the Ram 4500's radio.
The locked radio will usually show a blank screen with dashes.
Use the built-in buttons or touch controls to dial in each digit, then press OK to unlock the head unit.
To enter the unlock code on your Uconnect radio:
- When the radio is locked, the screen will display "ENTER CODE" or show four dashes (----).
- Use the on-screen keypad (touchscreen models) or the preset buttons (non-touchscreen models) to enter each digit of your 4-digit code.
- After entering all 4 digits, the radio will unlock automatically – no need to press a confirm button.
Tip: Ensure you enter the code carefully. Three incorrect attempts will trigger a temporary lockout.
Frequently Asked Questions about Ram 4500 Code
Not all of them require a security code, but many factory radios use it as an anti-theft feature.
Certain production series may still use a code depending on the head unit.
Free codes are uncommon.
You might already possess the code in the paperwork or from a service center, but most require a database lookup.
Yes. Each radio unit has its own radio code.
A different radio will need its own code to work.
Uconnect is the infotainment system developed by Stellantis (formerly Fiat Chrysler Automobiles) and used across Chrysler, Dodge, Jeep, Ram, Fiat, and Alfa Romeo vehicles. Most Uconnect radios feature an anti-theft protection system that activates whenever the radio loses power – for example after a battery replacement, a dead battery, or electrical work.
When triggered, the radio displays "ENTER CODE" and won't work until the correct 4-digit unlock code is entered. The code is linked to the radio's serial number, not the vehicle's VIN, which is why finding the serial number is the first step to unlocking.
Yes, for most vehicles. Uconnect systems from 2013 onwards include a hidden Dealer Mode (or Engineering Mode) diagnostic menu that displays the serial number right on the display. You can access it by holding specific button combinations – without any tools or removal.
However, some 2020+ models may have had Dealer Mode restricted via software updates. If you can't reach the on-screen menu, the radio must be physically removed to read the serial number label on the unit. See our full Dealer Mode guide for step-by-step instructions with video tutorials.
Yes. The 12-inch Uconnect display found in newer Ram 1500, 2500, and 3500 trucks still uses the same anti-theft protection system. If the battery is disconnected or replaced, the radio will lock and require a 4-digit unlock code.
To access Dealer Mode on the 12-inch screen, press the bottom-left and bottom-right edges of the physical screen bezel simultaneously. Navigate to System Info → Radio Part Info to find the serial number.