Confirm the AUX cable is fully inserted:

• Check both ends of the cable (car’s port and your device)
• Listen for a click when inserting to ensure proper connection

Test with a different AUX cable:

• Cables can fail over time – try a known working cable

Try another audio device:

• Test with a different phone or MP3 player
• Ensure the device’s volume is turned up

Select the correct audio mode:

• Press the CD/Aux button on your head unit
• Some models require you to press and hold the button

Check for physical damage:

• Look for bent pins or obvious damage inside the port
• Use a flashlight for better visibility

Clean the port:

• Use compressed air to remove dust and debris
• Gently use a soft brush if needed (avoid metal tools)

Test for loose connection:

• While playing audio, gently wiggle the cable at the port
• If the audio cuts in/out, the port may need repair

Check other audio sources:

• Test FM radio and CD player functionality
• If they work, the issue is likely Aux-specific

Reset the head unit:

• Disconnect the car battery for 5 minutes (negative terminal first)
• Warning: This may reset radio presets and the clock

Check fuses:

• Locate the audio system fuse (see owner’s manual)
• Inspect for blown fuses in both the interior and engine bay fuse boxes

Test with a multimeter:

• Check for continuity in the Aux port wiring
• Test for proper voltage (typically 5V on the center pin)

Inspect wiring connections:

• If comfortable, remove the head unit to check connections
• Look for loose, damaged, or corroded wires

If you’re not comfortable with these steps, consider professional help

Bluetooth adapters:

• FM transmitter (plugs into cigarette lighter)
• Hardwired Bluetooth adapter (connects to the AUX port)

Aftermarket head unit:

• Consider upgrading to a modern unit with Bluetooth
• Many options are available that maintain steering wheel controls