electrical
Antenna
for 2021 Ford F-150 3.5L V6 EcoBoost · 4WD
Difficulty
Easy
Time
36 min
Tools
5
Steps
12
This procedure covers removal and replacement of the roof-mounted antenna assembly on the 2021-2024 Ford F-150, including disconnecting the antenna cable and installing a new antenna mast or base.
Warnings
⚠Do not force plastic trim clips as they break easily. Replace any damaged clips during reassembly.
ℹ️Work on the roof requires stable footing. Use appropriate step stool or ladder and avoid placing weight on roof sheet metal.
ℹ️Ensure vehicle is parked in a clean, dry area to prevent debris entry into headliner cavity.
Tools required
Plastic trim removal tool setEssential
Socket set with 10mm socketEssential
Ratchet with short extensionEssential
Trim panel clip assortment
Dielectric grease
Parts
- Roof antenna assembly × 1 — Use OEM specification or aftermarket equivalent
- Antenna base gasket/seal × 1 — Usually included with antenna assembly
Preparation
- Park vehicle on level surface in clean, dry location
- Ensure ignition is off and key is removed
- Gather all tools and replacement parts
- Inspect new antenna assembly to confirm correct application
Procedure
- 1Access headliner at antenna locationFrom inside the vehicle, locate the antenna base position on the headliner near the rear of the cab roof. This is typically above the rear seats on crew cab models or toward the rear on other cab configurations. The antenna cable runs through the headliner to the radio module.
- 2Remove headliner trim panelUsing plastic trim removal tools, carefully pry down the headliner grab handle cover or trim panel closest to the antenna mounting location. Start at one end and work around the perimeter, releasing the retaining clips. Lower the headliner panel enough to access the antenna cable connector. Note the routing of any wiring harnesses in this area.
- 3Disconnect antenna cableLocate the antenna coaxial cable connector attached to the antenna base. Press the locking tab or rotate the connector counterclockwise (depending on connector type) and pull straight down to disconnect. If connector is tight, gently wiggle while pulling. Do not pull on the cable itself.
- 4Remove antenna mastFrom outside the vehicle, unscrew the antenna mast from the base by turning counterclockwise. If the mast is stuck due to corrosion or road debris, apply penetrating oil and allow to sit for 5 minutes before attempting removal. Use a rag for grip if needed, but avoid excessive force that could damage the base threads.
- 5Remove antenna base mounting fastenerUsing a 10mm socket with short extension, remove the antenna base mounting nut or bolt from the underside (accessed through the headliner opening). The fastener secures the antenna base to the roof panel. Hold the antenna base from the outside to prevent spinning while removing the fastener.
- 6Remove antenna base from roofFrom outside the vehicle, lift the antenna base assembly straight up and out of the roof opening. The gasket/seal may be stuck to the roof panel. If necessary, gently pry the base while maintaining even upward pressure. Inspect the roof opening for any rust, damage, or debris.
- 7Clean mounting surfaceClean the roof panel surface around the antenna mounting hole using a clean rag and isopropyl alcohol. Remove any old gasket material, adhesive residue, or corrosion. Ensure the surface is completely dry before installing the new antenna. Inspect the paint condition and touch up if necessary to prevent future corrosion.
- 8Install new antenna basePosition the new gasket/seal on the antenna base if not pre-installed. From outside the vehicle, insert the antenna base assembly into the roof opening, ensuring the gasket seats properly against the roof panel. Align the mounting hole with the threaded stud or bolt hole. The cable connector should be accessible from inside through the headliner opening.
- 9Secure antenna base mounting fastenerFrom inside the vehicle, thread the mounting nut or bolt onto the antenna base stud by hand until finger-tight. Using a 10mm socket, tighten the fastener while holding the antenna base from outside to prevent rotation. Ensure the gasket compresses evenly and the base sits flush with the roof panel. Do not overtighten as this can crack the base or distort the gasket.
- 10Connect antenna cablePush the coaxial cable connector straight onto the antenna base connector until it clicks or seats fully. If equipped with a threaded connector, rotate clockwise until hand-tight. Apply a small amount of dielectric grease to the connection if desired for corrosion protection. Gently tug the cable to verify secure connection.
- 11Install antenna mastFrom outside the vehicle, thread the new antenna mast clockwise into the antenna base. Hand-tighten only until snug. Do not use tools as this can strip the threads or damage the mast. Ensure the mast is vertical and properly seated.
- 12Reinstall headliner trimRoute the antenna cable back to its original position. Align the headliner trim panel with the mounting locations and press firmly around the perimeter to re-engage all retaining clips. Verify all clips are seated and the panel sits flush. Replace any damaged clips that were broken during removal.
Reassembly
- Ensure antenna cable is properly routed without sharp bends or pinch points
- Verify headliner panel is fully seated with all clips engaged
- Check that antenna mast is vertical and secure
Verification
- Turn ignition to accessory mode and power on the radio
- Test AM and FM radio reception by scanning through multiple stations
- Verify signal strength is consistent and comparable to pre-repair performance
- Inspect antenna base from outside for proper seating and no gap around gasket
- Check headliner for proper alignment and no sagging at repair area
- If equipped with satellite radio, verify XM/SiriusXM reception is functional