Factory headlight setup not identified

1991 Ford F250 Headlight Bulbs & Lighting Guide

Factory bulb sizes and relevant BulbFacts-tested replacement evidence for the 1991 Ford F250.

Source-listed fitment data supplied by CarBulbGuide. Confirm the installed bulbs and configuration before ordering.

Low beam: 9004
High beam: 9004
Factory setup: Factory headlight setup not identified

Representative pickup truck image for 1991 Ford F250 — Representative pickup truck image

Before choosing an upgrade

Confirm the installed bulbs and factory headlight system before choosing an upgrade.

Factory headlight setup not identified

High/Low Beam Combined: 9004

Confirm headlight fitment. Product recommendations remain unavailable until the bulb application and factory configuration are confirmed.

Other bulbs

Available exterior and interior lighting data for this model year.

Ashtray Light: 161Verify installed bulb
Automatic Transmission Indicator: 37Verify installed bulb
Cargo / Trunk Light: 912Verify installed bulb
Dome Light: 912Verify installed bulb
Front Side Marker: 3157Verify installed bulb
Front Turn Signal: 3157Verify installed bulb
Glove Box Light: 194Verify installed bulb
High Beam Indicator: 194Verify installed bulb
Map Light: 105Verify installed bulb
Parking Light: 3157Verify installed bulb
Parking Brake Indicator: 194Verify installed bulb
Rear Side Marker: 194Verify installed bulb
Rear Turn Signal: 3157Verify installed bulb
Reverse Light: 3156Verify installed bulb
Roof Marker Light: 194Verify installed bulb
Turn Signal Indicator: 194Verify installed bulb

Technical details and sources

Confirm the installed bulb, connector, housing, and factory system before ordering.

Position	Bulb or system	Fitment status
High/Low Beam CombinedFactory system not specified	9004	Verify installed bulb

Fitment note: Verify the installed bulb, connector, housing, and factory system before ordering. A bulb-size match is not automatically a conversion recommendation or proof of vehicle-specific testing.