Compare the Alpha Series ReadyFit bulb kit, J.W. Speaker 9600 heated headlight options and the matching adapter harness. Choose by the housing and electrical setup installed on your Peterbilt 589.
Confirm the exact application, selected side and package contents. A bulb kit, complete headlight and harness adapter serve different purposes.
Compare the Alpha Series ReadyFit bulb kit, J.W. Speaker 9600 heated headlight options and the matching adapter harness. Choose by the housing and electrical setup installed on your Peterbilt 589.
Confirm the exact application, selected side and package contents. A bulb kit, complete headlight and harness adapter serve different purposes.
Compare the type of replacement first, then check the original housing, electrical connection and supplied components. Category placement alone does not establish compatibility with every truck configuration.
The Alpha Series ReadyFit bulb kit supplies H11 low-beam and 9005 high-beam bulb pairs, extended low-beam caps, a decoder pair and grease. It does not include complete assemblies. Optional signal bulbs are separate; confirm housing suitability and permitted use before selecting the kit.
Compare the black and chrome J.W. Speaker 9600 listings for their stated Peterbilt 589 application, selected side and included components. Match the mounting and electrical requirements to the actual truck before choosing a finish.
The J.W. Speaker 9600 adapter harness is listed for 2024+ Peterbilt 589/567 applications. Its listing specifies one adapter for one headlight pod and two for a truck. Confirm the selected headlight and connector arrangement; the harness is not a headlight assembly.
The Alpha reference video and written guide relate to a Peterbilt 389. Use them only where the actual arrangement matches, and confirm the 589-specific housing, wiring and decoder procedure. Follow the chosen assembly’s instructions for connections, lighting functions and final aim.
The Alpha kit replaces the listed serviceable H11 low-beam and 9005 high-beam bulbs in an eligible matching housing. A complete assembly replaces the housing and includes only the components stated in that assembly’s listing.
No. The 2024 manual does not approve LED replacement sources for its documented headlamp, and the January 2026 manual warns against them in PACCAR headlamps because of overheating and fire risk. Do not use the bulb kit in headlamps covered by those restrictions.
It includes H11 and 9005 bulb pairs, extended low-beam caps, a compact decoder pair and grease. Optional signal bulbs are separate. Compare the actual housing and cap opening, and use decoder modules only as required by the circuit and installation guidance.
Match the exact assembly, selected side and stated truck application to the harness or adapter instructions. Do not treat an adapter listing as a complete headlight or assume one harness suits every 589 configuration.
The retained video and written guide relate to a Peterbilt 389. Use them as reference material only where the actual arrangement matches, and confirm the 589-specific housing, wiring and decoder procedure separately.
The listed Peterbilt 589 adapter supplies one harness for one headlight pod. Its description states that two harnesses are required for a truck. Confirm the contents of your selected headlight package and the exact wiring application before ordering additional components.
