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Automann · Electrical & Lighting
577.99135R
In stock · ships from Knoxville
This is a replacement headlight connector (plug / pigtail) for H4 (9003) bulbs, commonly used on heavy-duty trucks and commercial vehicles.
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Verified fitment for 1 applications
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All confirmed applications for this part number.
Verify your truck uses H4/9003 bulbs before ordering; many Freightliners use H13 or other bulb types. Matches Freightliner OEM numbers A06-20714-000 / A0620714000.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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It repairs a damaged, melted, or corroded headlight socket so you get a reliable electrical connection and consistent light output. When your original connector causes flickering, intermittent light failure, or a loose bulb, swapping in this connector restores safe, dependable headlight function.
Part Number: 577.99135R
HEADLIGHT CONNECTOR H4
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
