Number plate light harness. Porsche 911 / 912 SWB 1965-68 › 90161204120

The OE Match number plate light harness provides the wiring connection for the number plate lighting circuit on early Porsche 911 / 912 SWB, this is the early harness version used up to 1968. 

Fits

• Porsche 911 1965–68
  
  Check fitment for your specific vehicle (model, year, engine) before ordering.
  
  Diagram ref no 16
  
  What Is This Part?

This is a dedicated wiring harness for the number plate lights, forming one section of the vehicle’s electrical wiring. It carries the electrical connection needed by the lamps that illuminate the rear registration plate. The early Porsche wiring arrangement uses separate harness sections for different circuits, allowing this lighting section to be addressed during a localised repair or restoration. Match the existing connections and wiring arrangement before fitting. 

What Does This Part Do?

• Connects the number plate lights: Provides the wiring link serving the registration plate lighting circuit.
• Supports lamp operation: Carries the electrical supply needed for the connected lamps to illuminate.
• Provides a dedicated wiring section: Allows damaged number plate light wiring to be renewed as part of a focused electrical repair.
  
  The harness belongs to the early number plate lighting wiring arrangement, with the application restricted to cars up to 1968. 

Why Replace This Part?

Replacement may be appropriate when inspection traces a lighting fault to damaged conductors, deteriorated insulation or corroded connections within this harness. Moisture can cause corrosion beneath cable insulation, while loose or dirty connections can introduce resistance and voltage drop. These faults may interrupt the electrical supply or cause inconsistent lighting. 

Inspect the bulbs, lamp contacts, supply and earth connections before replacing the harness. A failed number plate light does not by itself establish that the wiring needs renewal. During restoration, assess previous wiring repairs and retain sound wiring where it remains suitable.

When to Replace This Part?

• Damaged insulation: Cracks, chafing or exposed conductors are found during inspection.
• Corroded connections: Cable ends or terminals have deteriorated and no longer provide a sound connection.
• Confirmed wiring fault: Electrical testing identifies an interrupted connection or excessive voltage drop in this harness.
• Unreliable previous repairs: Loose joints, damaged splices or altered wiring cannot be retained satisfactorily.
• Intermittent lighting: Flickering or loss of illumination is traced to the harness rather than the bulbs or lamp holders.
  
  Where Is This Part Fitted?

Location: In the wiring serving the rear number plate lights, between the vehicle’s lighting wiring and the number plate lamp connections.

FAQs

• What should be checked before replacing the harness?
  Check the bulbs, lamp contacts, connectors and earth connections. Continuity checks and voltage-drop testing under load can help distinguish a wiring fault from a poor connection elsewhere. ()
• Does flickering mean the harness has failed?
  Not necessarily. Inspect the complete affected circuit and replace the harness only when its condition or testing supports that decision.
  
  Product Summary

• Product: Number plate light wiring harness.
• Brand: OE Match.
• Purpose: Connects the number plate lighting circuit.
• Repair context: Replacement of damaged or deteriorated local lighting wiring.