Rear Indicator light wire harness. Porsche 911 1970-89  ❭  91161203910

Rear indicator light wiring harness by OE Match for selected Porsche 911 and 930 models from 1970–89. This replacement harness is intended for the electrical connection to the rear lamp assembly, with Left or Right installation dependent on the model year and application.

Fits:
Porsche 911 1970-89

What This Product Does

The harness carries the electrical connections between the vehicle wiring and the rear lamp unit. It provides a replacement for wiring affected by age, damaged insulation, corroded terminals or unreliable connections.

Functions

• Connects the vehicle loom to the rear light assembly
• Supports operation of the rear indicator and associated lamp circuits
• Replaces deteriorated wiring and terminals
• Helps restore consistent electrical continuity at the lamp

Technical Details

• Component type: rear light wiring harness
• Fits Left or Right depending on the specific year and rear-light configuration

Symptoms of Fault

• Rear indicator works intermittently or stops operating
• Lamp remains inoperative after the bulb has been replaced
• Corrosion or discolouration around connector terminals
• Cracked, hardened or damaged wire insulation
• Flickering or dim rear lighting
• Unusual lamp behaviour when braking and indicating together

Why Replacement Matters

Ageing wiring can develop increased resistance, broken conductors or poor terminal contact. Renewing a damaged harness can restore a dependable connection without relying on temporary wire repairs. The rear lamp earth points, bulb holder, seals and connectors should also be inspected during installation, as faults in these areas can produce similar symptoms.

FAQs

• Does this harness fit either rear lamp?
  Left or Right application varies according to the model year and lamp configuration. Compare the part reference and existing connectors before installation.
• Can a faulty earth cause similar symptoms?
  Yes. Corroded or loose earth connections can cause dim lamps, intermittent operation or interaction between lighting circuits.
• Should the lamp seals be checked?
  Yes. Damaged seals may allow moisture to reach the bulb holder and electrical connections, causing corrosion.
• Is diagnosis recommended before replacement?
  Inspect the bulb, fuse, terminals, earth points and wiring continuity to confirm the source of the fault.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91161203910

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