Dim or failed central cargo lamps on a 2017 Ford F-150 make it harder to see the pickup bed and trailer-hitch area at night. This guide covers the factory, bulb-serviceable incandescent rear cab-lamp assembly with removable 912 cargo-light bulbs. It does not cover the center 921 brake-light bulb, factory LED high-mount/cargo assemblies, the LED lamps at the sides of the cargo box, aftermarket housings or other model years. There is no dedicated OBD-II code that proves a cargo bulb has failed, so identify the installed equipment and diagnose the circuit before ordering parts.
Beginner, if safely reachable
20–35 minutes
About $10–$25 for a pair; planning estimate
Featured replacement: SYLVANIA 912 SilverStar two-pack
The exact featured item is the SYLVANIA 912 SilverStar Mini Bulb, manufacturer part number 912ST.BP2, Amazon ASIN B0BKLXB9X1. The selected retail package contains two 912 incandescent miniature bulbs, enough to replace the two serviceable central cargo-lamp bulbs when the truck has that factory configuration. The package does not include the center 921 brake bulb, sockets, wiring, lamp housing, gasket, screws, tools or LED components.
SYLVANIA identifies the product’s OE part number as 912. A Ford parts catalog for the 2017 F-150 separately identifies Ford bulb D7TZ-13466-A as 912 and distinguishes the bulb-serviceable high-mounted stop lamp with cargo light from the LED high-stop/cargo assembly. Because equipment can vary, the final fitment checks are the installed serviceable housing and a removed cargo bulb marked 912; do not rely on a similar-looking wedge base alone.
Check the exact SYLVANIA 912 SilverStar two-pack on Amazon
Purchase evidence: Amazon’s cached exact-product page displayed “50+ bought in past month” when retrieved October 23, 2026; the page crawl was from the prior month. This rounded Amazon indicator is not audited sales data, a live inventory claim, a price promise or proof of vehicle fitment. The page showed no featured offer, so no current price or seller is stated here.
Vehicle fitment and exclusions
| Application | Supported configuration | Verification before purchase | Important exclusion |
|---|---|---|---|
| 2017 Ford F-150, U.S./Canada owner’s-manual application | Original rear cab-lamp assembly retained by four screws, with removable twist-out cargo-bulb sockets | Confirm both cargo positions use removable bulbs marked 912 | Factory LED cargo/high-mount assemblies are not serviced with these bulbs |
| Cab, bed, engine and drivetrain | The lamp equipment—not the powertrain—is the controlling fitment check | Inspect the installed assembly and removed bulb before opening the new package | Aftermarket or modified housings may use different bulbs or wiring |
| Center brake-light position | Not covered by the featured 912 product | Ford specifies a 921, 16 W bulb for the serviceable center stop lamp | Do not install a 912 in the center brake socket |
| Cargo-box side lamps | Not covered | Ford identifies these as LED | The 912 bulbs do not service those side lamps |
| Other years or markets | Not established here | Use the applicable owner/service information and inspect the installed part | Do not transfer this fitment from a visually similar truck |
Diagnose the cargo lamps before replacement
Ford locates cargo lamps in the central high-mounted stop-lamp assembly and, on equipped trucks, at the sides of the cargo box. Pressing the cargo-lamp control operates the cargo and trailer-hookup lighting, but the lamps automatically turn off above 3 mph (5 km/h) and after about 10 minutes. Test with the truck stationary, secured in Park, and allow for that timed shutoff before assuming a fault.
- One central cargo bulb is dark: a failed filament or poor local socket contact is plausible. Compare the two positions and inspect the dark bulb and socket.
- Both central cargo bulbs are dark: do not assume both bulbs failed simultaneously. Check whether the cargo-lamp control, trailer-hookup lamp and any equipped side cargo lamps respond. A fuse, control, connector, ground or shared wiring fault may be responsible.
- A bulb flickers: suspect a loose bulb, oxidized terminal, damaged socket or intermittent wiring before repeatedly installing bulbs.
- Water or condensation is present: identify the leak and inspect the gasket and housing. New bulbs do not repair water entry.
- The housing has no removable bulb sockets: stop. It is likely a sealed LED or aftermarket assembly, and this product and procedure do not apply.
A visual filament check helps but is not conclusive. No generic engine OBD-II code specifically identifies a burned-out cargo bulb. Melted plastic, recurring bulb failure, damaged insulation, an opening fuse or a known-good bulb that remains dark calls for circuit diagnosis; never install a higher-rated fuse.
Tools and supplies
| Tool or Supply | Exact Product | Product Link | Purpose and Selection Check |
|---|---|---|---|
| Replacement bulbs — required after diagnosis | SYLVANIA 912 SilverStar, 912ST.BP2, two bulbs | View exact 912 two-pack | Use only after confirming serviceable central cargo sockets and 912 markings. The pair does not fit the center 921 brake position. |
| Hand screwdriver — required | User-owned driver with a tip that fully seats in all four installed screw heads | No purchase needed | Ford specifies four screws but does not publish a driver size in the owner’s manual. Inspect first; a loose-fitting tip can strip the heads. |
| Eye protection — recommended | Clean ANSI Z87.1-rated safety glasses already on hand | Use existing protection | Helps protect against overhead dust or debris. Replace scratched or damaged eyewear. |
| Clean gloves or lint-free cloth — recommended | Clean, dry pair or cloth already on hand | No purchase needed | Keeps dirt and skin oils off the bulbs and helps protect paint while handling the assembly. |
| Stable work platform — only if needed | User-owned, manufacturer-rated platform for the user and required working height | No product link | Use only on firm, level ground. If the lamp cannot be reached without leaning or climbing on the truck, use professional service. |
Estimated DIY and shop cost
DIY: plan roughly $10–$25 for the two-bulb package, plus $0 when you already own the correct hand driver, clean gloves, eye protection and any safely required platform. A first-time tool purchase can add about $10–$25. These are planning ranges, not live Amazon prices. Ford’s procedure does not call for sealant or grease, and the bulb package does not include a gasket.
Professional service: a straightforward pair of cargo bulbs may total roughly $50–$140, depending on local diagnostic and labor minimums. A damaged socket, leaking lamp, wiring fault or sealed LED assembly can cost more. Ask for a written local estimate rather than treating this range as a quote.
How to replace the incandescent central cargo-lamp bulbs
- Confirm the exact configuration. Look at the rear cab lamp before opening anything. This procedure requires a bulb-serviceable assembly retained by four screws with removable cargo sockets. If it is a sealed LED or aftermarket unit, stop.
- Test and identify the positions. With the truck stationary, press the cargo-lamp control and note which central cargo position is dark. Distinguish the two cargo lamps from the center brake lamp. Switch all lamps and the ignition off, remove the key and let the assembly cool.
- Set up safe access. Apply the parking brake, wear eye protection and protect the painted cab roof. Use a stable rated platform only if necessary. Keep screws and tools where they cannot fall into the bed or scratch paint.
- Remove the four screws. Use a hand driver whose tip fully engages each installed head. Support the lamp with one hand as the last screw comes out.
- Move the lamp assembly away from the cab. Pull only far enough to reach the sockets. Do not lever against the paint, stretch the harness or let the assembly hang by its wiring. Note the gasket’s position and inspect it for tears, flattening or evidence of leakage.
- Identify a cargo-bulb socket. Do not open the center 921 brake-bulb socket. Rotate the selected cargo socket counterclockwise and pull it out of the assembly.
- Remove and verify the bulb. Pull the bulb straight out—do not twist the glass. Confirm the removed bulb is marked 912 and compare its wedge base with the 912ST.BP2 replacement. Inspect the socket for green corrosion, looseness, darkening or melted plastic.
- Install the new 912 bulb. With clean, dry gloves or a lint-free cloth, press the replacement straight into the socket until fully seated. Do not force it. If the base or marking differs, stop and obtain the correct part.
- Repeat for the second cargo position if appropriate. The package contains two bulbs, and replacing a matched pair avoids leaving an aged mate beside a new bulb. Repeat only after identifying the second 912 cargo socket; leave the center 921 brake bulb alone.
- Reinstall the sockets and assembly. Insert each socket and rotate it clockwise until secure. Position the gasket and lamp evenly against the cab. Start all four screws by hand, then tighten evenly only until the housing is secure and the seal is seated. Ford publishes no torque value for these screws in the owner’s-manual procedure; do not overtighten the plastic housing.
Final inspection and functional checks
- Verify the assembly sits flush, the gasket is not pinched, all four screws are present and the housing does not move.
- Remove tools and the work platform. With the truck still parked and secured, operate the cargo-lamp control and confirm both central cargo lamps illuminate steadily.
- Confirm the lamps switch off normally. Remember that Ford’s control logic can turn them off automatically after about 10 minutes or above 3 mph.
- Have a helper press the service brake with the transmission in Park and the parking brake applied, then verify the center high-mount brake lamp still works independently.
- If either new bulb remains dark, flickers or becomes unusually hot, switch the lamps off and diagnose the socket, connector, ground and power circuit rather than installing another bulb.
- After rain or a gentle exterior wash, inspect for new condensation or water entry. Do not aim a pressure washer directly at the lamp seal.
Common mistakes to avoid
- Buying before identifying the assembly: sealed LED units are not serviced with 912 bulbs.
- Confusing the three central positions: the two cargo lamps use the validated 912 fitment; the center brake lamp is a 921 on the serviceable configuration.
- Balancing on the truck: a tire, bumper, bed rail or tailgate is not a safe work platform.
- Pulling on the wiring: support the lamp as it releases and move it only far enough to access the sockets.
- Overtightening the screws: excess force can crack the housing or distort the seal. Ford does not provide a screw torque in the owner’s-manual procedure.
- Ignoring water or heat damage: bulbs do not repair a leaking gasket, burned socket or electrical fault.
Frequently asked questions
Are all 2017 F-150 cargo lamps replaceable 912 bulbs?
No. This guide is limited to the factory bulb-serviceable rear cab-lamp assembly whose removable cargo bulbs are marked 912. Factory LED high-mount/cargo equipment and the cargo-box side LEDs are not serviced with these bulbs.
Does this two-pack also replace the third brake-light bulb?
No. Ford specifies a 921, 16-watt bulb for the serviceable center high-mounted brake lamp. The 912 two-pack here is for the two adjacent cargo positions only.
Should I disconnect the battery?
Ford’s owner’s-manual bulb procedure begins with the lamps switched off and does not direct a battery disconnect for this task. Keep the ignition and lamps off while sockets are open. If wiring damage is present, stop and follow circuit-specific service information.
Can I replace only the failed cargo bulb?
You can diagnose one failed position, but the selected package contains a matched pair and both original bulbs have usually accumulated similar operating time. Replace both only after confirming that both cargo sockets use 912 bulbs.
Why did the cargo lamps turn off while I was testing them?
Ford states that the cargo and trailer-hookup lamps turn off automatically above 3 mph and after about 10 minutes. Reoperate the control with the truck stationary before assuming the new bulbs failed.
Sources and related Ford F-150 help
- 2017 Ford F-150 Owner’s Manual, second printing: cargo-lamp operation, removal procedure, LED exclusions and bulb chart.
- SYLVANIA 912 SilverStar product page: manufacturer part number and OE bulb number.
- 2017 Ford F-150 rear-lamp parts catalog: 912 bulb identification and distinct incandescent/LED high-mount assemblies.
- Exact SYLVANIA 912 SilverStar two-pack product page: product identity, ASIN, package and observed purchase indicator.
- Vehicle-reference photo source and public-domain declaration.
- Ford F-150 repair guides, the related 2017 center brake-light bulb guide, and the Ford F-150 mechanic chatroom.