2020-2021 Jeep Gladiator Radio Amplifier: Fixing No Sound & Audio Cut-Outs

Is This Guide For You?

This article applies specifically to 2020-2021 Jeep Gladiators equipped with the optional Alpine Premium Audio Group. If your Gladiator has the base audio system with the 5-inch or 7-inch Uconnect screen (without the 'Alpine' branding on the speakers), it does not have a separate external amplifier, and this guide does not apply. In base models, the amplification is handled inside the radio head unit.

Symptoms of a Failing Radio Amplifier

When the factory amplifier begins to fail, it can cause a range of frustrating audio problems. Here are the most common signs reported by Gladiator owners:

• Complete Loss of Sound: The most obvious symptom is when the radio appears to be working, but no sound comes from any of the speakers.
• Intermittent Audio: Sound that cuts in and out randomly while driving. Some owners report that hitting a bump or closing a door can temporarily restore the sound, suggesting a loose internal component or external connection.
• Popping, Crackling, or Static Noises: Unwanted noises that occur even at low volumes can point to failing electronic components inside the amplifier.
• Distorted or Muddled Sound: Music may sound fuzzy, unclear, or lack bass punch, especially as volume increases.
• Only Some Speakers Work: One or more speakers (e.g., only the driver's side or only the sound bar) may stop working while others continue to play.

First, Rule Out Other Issues

Before condemning the amplifier, perform these simple checks, as they can mimic amplifier failure:

1. Head Unit Reset: Press and hold the volume and tuner knobs simultaneously for 15-20 seconds until the screen resets. This can resolve temporary software glitches that cause audio loss.
2. Check Ground Connections: A loose ground is a common cause of audio problems in Jeeps. In the passenger side footwell, remove the plastic trim panel to access the grounding lugs. Check that the nuts are tight and the connections are clean, particularly the one for the audio system.
3. Check Fuses: Verify that the fuses related to the radio and amplifier are not blown. The radio fuse (F97, a 20-amp yellow fuse) is located in the fuse box by the battery.
4. Bluetooth/Notification Glitches: Sometimes, a connected phone can cause the audio to dip or cut out when a notification arrives, even if the notification sound is muted. Test the audio with your phone's Bluetooth turned off to rule this out.

Known Issues, TSBs, and Recalls

Technical Service Bulletin (TSB) for Popping/Crackle Noise

TSB 08-003-22 REV. A: This bulletin addresses customer complaints of speaker popping or crackling noises, specifically during Voice Recognition (VR) and navigation guidance prompts. The fix is not a hardware replacement but a software update for the radio. If your primary issue is popping during these specific situations, a dealer may be able to resolve it by flashing the latest Uconnect software.

Recalls

As of this writing, there are no active recalls specifically for the radio amplifier on the 2020-2021 Jeep Gladiator. There are unrelated recalls for the instrument panel cluster and a fire risk associated with the power steering pump wiring, but these do not directly involve the audio amplifier.

Buying a Used 2020-2021 Gladiator Radio Amplifier

A used OEM amplifier is often the most practical and cost-effective solution for a failed unit. Because the factory system relies on a specific digital signal processor (DSP), dropping in a used OEM part is far simpler than attempting to integrate an aftermarket amplifier.

Part Number is Critical

You must match the part number to ensure compatibility. For the 2020-2021 Gladiator, there are two primary part numbers:

• 68441766AB: The original part number.
• 68549092AA: The newer, revised part number that supersedes 68441766AB.

What to Inspect on a Used Amplifier

• Check the Connectors: The electrical connector pins should be straight, clean, and free of any green or white corrosion. Corrosion is a major red flag indicating water damage, a common issue in Jeeps.
• Inspect the Case: Look for any signs of physical damage, such as a dented or cracked case. Avoid any units that look like they've been dropped or improperly handled.
• Verify the Part Number Sticker: Ensure the sticker with the Mopar part number is present and legible. Match it to the numbers listed above.

Programming and Installation

Amplifier Location

The factory amplifier is located under the driver's side dashboard, mounted up high near the steering column and above the OBD-II diagnostic port.

Replacement Overview

Replacing the amplifier is a moderately easy DIY job that requires some patience and flexibility to work in a tight space.

1. Disconnect the negative battery terminal.
2. Remove the lower dash panel and knee bolster under the steering wheel to gain access.
3. Locate the amplifier. It is a silver metal box with cooling fins.
4. Disconnect the main electrical harness from the amplifier.
5. Unbolt the amplifier from its mounting bracket. This may require a small socket wrench with an extension.
6. Install the new amplifier, reconnect the harness, and reassemble the dash panels.
7. Reconnect the battery and test the system.

Cost Comparison

Replacing a failed amplifier can have a wide range of costs depending on the route you take.

Frequently Asked Questions (FAQ)