Headlight Upgrade - Sealed Beam to H4 Conversion
Replace the factory H6054 sealed-beam 5x7 headlamps — fitted to every Cherokee XJ from 1984 through the last 2001 model, not only the early trucks — with H4 conversion housings (Truck-Lite 27270C or Hella 003177801) for vastly better light using replaceable bulbs.
The XJ ran the same dim H6054 sealed-beam rectangular lamp (5x7 inches) for its entire production run; there was never a factory switch to a composite housing with a replaceable bulb. Stock sealed beams produce roughly 20% of what a modern projector does. The standard fix: drop in 5x7 H4 housings — Hella E-code with 60/55W H4 bulbs has been the enthusiast pick for 25 years; Truck-Lite LED (27270C) is the modern equivalent for $200/pair and is DOT-legal.
No wiring mods strictly required — the factory connector adapts via included H4 pigtails. HOWEVER: the factory headlight wiring is undersized 18 AWG and routes B+ through the dash switch. If you upgrade to higher-wattage bulbs (80/100W H4) you MUST install a relay harness (Painless 30815 or similar) that feeds battery+ directly to relays triggered by the dash switch — otherwise you cook the switch and get dim output.
For owners who want a single-piece LED unit instead of a bulb-replaceable H4 housing, see the direct LED sealed-beam and full-housing options in the LED headlight upgrade guide — same H6054 mounting bucket, no wiring changes either way. For SOA (square optic axis) bulbs in H4 housings, aim properly — bad aim from a great bulb is worse than mediocre aim from a stock bulb. Use a wall 25 feet away at the proper height.
Steps
- Remove the trim ring around each headlight bucket (2-3 Phillips screws) — leave the adjustment screws at the top and side of the bucket alone, those set aim, not retention.
- Pull the sealed beam forward out of the bucket and unplug the factory 2-wire connector from the back.
- Plug in the H4 housing's included pigtail adapter, then seat the housing in the bucket and reinstall the trim ring.
- If you're staying at stock 60/55W H4 wattage (Hella E-code), no further wiring is required — the factory circuit handles the load fine.
- If you're stepping up to 80/100W H4 bulbs or the Truck-Lite LED housing's higher draw, install the relay harness now: relay-triggered power runs straight from the battery to each headlight, and the factory dash switch only triggers the relay coil instead of carrying full headlight current.
- Aim both housings before driving at night. Park 25 feet from a flat wall, mark the stock low-beam cutoff in daylight, then adjust the housing's vertical and horizontal screws to match. A correctly-aimed H4 housing beats a mis-aimed "better" bulb every time.
Why it works
- massive improvement over sealed beams
- replaceable bulbs
- Truck-Lite are DOT legal LED
Trade-offs
- still need relay harness for high-watt bulbs
Tools required
- screwdriver
- 10mm socket
Parts
| Part | Vendor | Est. price |
|---|---|---|
| Hella H4 E-code 7x6 conversion (pair) | Hella | ~$90 |
| Truck-Lite 27270C LED 7x6 (pair) | Truck-Lite | ~$240 |
| Painless headlight relay harness | Painless Performance | ~$80 |
Sources
Related
- LED Headlight Upgrade — 5x7 Sealed-Beam Replacement and Full LED Housings
- All Jeep Cherokee XJ guides & tools
- Browse the full DIY database
Written and maintained by an AZ wheeler and driveway wrencher. How we source guides. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.