United Pacific 31388 • halogen • combined high/low • one assembly
Glass-lens high/low headlight with a pre-installed 9007 bulb
United Pacific 31388 is one dual-function 4×6 halogen headlight with high and low beam. It combines a crystal-clear glass lens and reinforced aluminium reflector with a pre-installed Sylvania 9007 bulb.
Combined beam
High and low beam operate through the 9007 bulb in this assembly.
12V 65/55W bulb
A Sylvania 9007 halogen bulb is pre-installed.
One assembly
The manufacturer package quantity is one headlight with bulb and adapter.
Product details
Construction, connection and manufacturer-listed compliance
Lamp construction
- Crystal-clear glass front lens
- Reinforced aluminium reflector
- Anti-vibration construction
Included connection
United Pacific 34206 adapts the lamp’s 9007 bulb/socket to a vehicle’s three-pin H4656 plug.
Listed compliance
United Pacific lists DOT/SAE and FMVSS 108 for 31388. Correct installation and aiming still apply.
Before ordering
Confirm the three-pin connector and mounting bucket
Check the manufacturer’s application details, then verify the original connector functions, mounting bucket, rear clearance, voltage and quantity. The included 34206 supports a three-pin H4656 vehicle plug; it does not prove a two-pin H4651 electrical match.
United Pacific notes that bucket modification may be required on Peterbilt 379 and Kenworth W900 installations.
Package contents
One assembly with bulb and H4656 adapter
Included: one 31388 headlight, one pre-installed Sylvania 9007 12V 65/55W bulb and one United Pacific 34206 9007-to-H4656 three-pin adapter.
Questions before ordering
United Pacific 31388 FAQ
Does 31388 provide both low and high beam?
Yes. United Pacific identifies 31388 as a dual-function high/low headlight.
Which adapter is included?
United Pacific 34206 is included. It adapts the lamp’s 9007 bulb/socket to a three-pin H4656 vehicle plug.
What bulb is installed?
A Sylvania 9007 halogen bulb rated 12V, 65/55W is pre-installed.
Can bucket modification be required?
Yes. United Pacific notes possible bucket modification on Peterbilt 379 and Kenworth W900 installations.
Is this listing for a pair?
No. The manufacturer package quantity is one headlight assembly.
Compare 4×6 options
Compare dual-function and high-beam halogen assemblies
Warranty
Six-month limited warranty
This product includes a six-month limited warranty. Coverage remains subject to the warranty terms and exclusions.
