How to Install an Antenna Extension Cable in Your Car

Quick Answer

Installing an antenna extension cable is a straightforward job. You will need a compatible cable, like the Metra 44-EC18, and a few minutes to connect it between your antenna and radio.

Installation Steps

1. Step 1: Disconnect the Battery: Disconnect the negative terminal of your car battery to prevent any electrical shorts or accidental airbag deployment while working near the radio. Wait at least 60 seconds after disconnecting before proceeding.
2. Step 2: Remove the Radio Trim: Use a trim removal tool to gently pry off the plastic trim around your radio. Unscrew any mounting brackets holding the radio in place, then slide the radio out far enough to access the back. Keep track of all screws and trim clips to avoid losing them.
3. Step 3: Unplug the Factory Antenna: Locate the factory antenna cable plugged into the back of the radio. Gently pull it straight out by the connector, not the wire itself. If the connector is stuck, use a small flathead screwdriver to gently release the locking tab.
4. Step 4: Connect the Extension Cable: Plug the female end of the Metra 44-EC18 onto the radio's antenna input. Then, plug the factory antenna cable into the male end of the extension cable. Push each connection until you hear a click. A loose connection causes weak or intermittent radio reception. Ensure each plug is fully seated.
5. Step 5: Route and Secure the Cable: Route the extension cable away from power wires and sharp metal edges. Use zip ties or adhesive cable clips to secure it along the existing wire harness or chassis. Avoid sharp bends or kinks in the cable that could damage the internal wire.
6. Step 6: Test Before Reassembling: Reconnect the battery, turn on the radio, and tune to a known strong station. Check for clear reception on both AM and FM bands. If reception is poor, re-check both connections and the cable routing for interference.
7. Step 7: Reinstall the Radio and Trim: If reception is good, turn off the car, disconnect the battery again, and slide the radio back into the dash. Reattach the trim and reconnect the battery. Do not pinch the antenna cable between the radio and the dash bracket when sliding it back in.

Product Fact

• Metra 44-EC18 18 Inch Antenna Extension Cable: The Metra 44-EC18 is an 18-inch antenna extension cable that connects a Motorola male plug to a Motorola female jack. This length is ideal for routing the cable behind a dashboard or through a console without creating excess wire that needs to be bundled.