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1977 Honda CB550F Wiring Harnesses

Choose wiring for your 1977 Honda CB550F by tracing the section that needs replacement. The main loom, junction-panel sub harness and horn sub harness are distinct products. Compare the original references, installed connections and any previous alterations before choosing one section or a larger renewal.

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Honda CB750 CB550 CB400 pilot turn signal light cover 37600-377-018

Honda CB750 / CB550 / CB400 Pilot Turn Signal Light Cover ~ Replaces 37600-377-018

$54.95 USD
99-4819
Restore your gauge cluster with this replacement Pilot Indicator Light Cover — a direct fit for OEM #37600‑377‑018. This part includes both the front...
Honda CB750K CB550F horn sub harness 38105-369-000

1977-78 Honda CB750K / CB550F Horn Sub Harness ~ Replaces 38105-369-000

$7.95 USD
73-0111
Replace your horn sub harness with this Horn Sub Harness, the harness that attaches to the horn. Replaces OEM #38105-369-000.Key Features• Horn sub harness•...
Honda CB550F CB550K sub wire harness 32105-390-000

1975-78 Honda CB550F / CB550K Sub Wire Harness ~ Replaces 32105-390-000

$29.95 USD
73-0123
Replace your CB550 sub wire harness with this Sub Wire Harness (Junction Panel Harness), the sub harness on the bike that many electrical components...
Honda CB550F wire harness 32100-390-010

1975-77 Honda CB550F Wire Harness ~ Replaces 32100-390-010

$99.95 USD
24-4015
Replace your CB550F Supersport wire harness with this Main Wire Harness Loom, replacing OEM #32100-390-010 / #32100-390-000.Key Features• Main wire harness loom• Replaces OEM...
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1977 Honda CB550F · Wiring Harnesses Buying guide

Identify the main loom or the specific sub harness

A damaged horn lead does not require the same purchase as deteriorated main wiring. Match the repair to the main loom, the junction-panel connections or the separate harness that attaches to the horn.

Parts to consider

1975-77 Honda CB550F Wire Harness ~ Replaces 32100-390-010 CB550F main wiring loomMain loom for the 1975–77 CB550F, replacing references 32100-390-010 and 32100-390-000.View part 1975-78 Honda CB550F / CB550K Sub Wire Harness ~ Replaces 32105-390-000 Junction-panel sub harnessSeparate sub harness connecting components such as the fuse box, starter switch and rectifier; reference 32105-390-000.View part 1977-78 Honda CB750K / CB550F Horn Sub Harness ~ Replaces 38105-369-000 1977 CB550F horn sub harnessSeparate harness attaching to the horn; replaces reference 38105-369-000 for the 1977 CB550F.View part

Choose main and junction-panel wiring independently

The main loom replaces references 32100-390-010 and 32100-390-000. The separate junction-panel sub harness replaces 32105-390-000 and connects components such as the fuse box, starter switch and rectifier. Inspect both sections when planning the order rather than assuming one product includes the other.

Use the separate horn section for a local wiring repair

The horn sub harness attaches to the horn and replaces reference 38105-369-000 for the listed 1977 CB550F application. Compare that local section with the fitted horn and loom connections. It supplies wiring, not the horn itself, and it should not be treated as proof that any custom horn will connect without changes.

Buying questions

Which loom should I choose for damaged junction-panel connections?

Compare the separate junction-panel sub harness, reference 32105-390-000, with the damaged section. It connects components including the fuse box and rectifier. The main loom is a different purchase, so inspect its condition separately.

Is the horn sub harness supplied with a replacement horn?

No horn is claimed as part of this wiring product. The sub harness is the separate section that attaches to the horn, reference 38105-369-000. Compare the installed connections and confirm the horn’s condition independently.

Will a main loom automatically reverse every previous wiring modification?

Check the fitted equipment and its connections first. Aftermarket switches, lamps or ignition conversions may use arrangements different from the original wiring. Compare each altered connection with the diagram before treating an original-style main loom as the full solution.

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