how to fix the radio in my Toyota Highlander Third Generation (2014-2019) not working

Solution

1. Preparation

• Gather necessary tools: flathead screwdriver, Torx driver set, multimeter, and a new fuse (if needed).
• Ensure the vehicle is parked in a safe location, and the ignition is turned off.

2. Check and Replace Fuses

• Locate the fuse box under the dashboard or the engine compartment.
• Identify the fuse associated with the audio system using the diagram on the fuse box cover.
• Remove the fuse using the fuse puller or pliers.
• Inspect the fuse for continuity with a multimeter; replace it if it is blown.
• Reinsert the new fuse and secure the fuse box cover.

3. Remove and Inspect Radio Unit

• Use a flathead screwdriver to gently pry off the trim panel surrounding the radio.
• Remove the screws securing the radio in place using a Torx driver.
• Carefully slide the radio out of its mounting bracket.
• Inspect the wiring harness for any loose connections; reconnect tightly if necessary.

4. Power and Ground Connection Check

• Use a multimeter to check the power and ground connections at the radio harness.
• Ensure the power wire is receiving voltage (typically +12V) when the ignition is on.
• Check the ground wire for good continuity to the vehicle chassis; repair if necessary.

5. Reinstall Radio and Trim

• Slide the radio back into the mounting bracket and secure it with screws.
• Reattach the trim panel carefully, ensuring it snaps back into place without damage.