Rear window heater relay harness. Porsche 911 1971-73  ❭  91161205400

Rear window heater relay harness
This OE Match rear window heater relay harness is a replacement wiring harness used in the heated rear window / rear screen demister system on Porsche 911 models from 1971 to 1973. It is designed to match the original-style wiring layout and provide a secure electrical connection for the rear window heater relay.

Fits:
Porsche 911 1971 - 1973


The relay harness connects the rear window heater relay into the vehicle’s electrical system, allowing power to be supplied correctly to the heated rear window circuit. It helps the rear window demister operate as intended, clearing condensation and improving rear visibility in cold or damp conditions.

Functions
• Connects the rear window heater relay to the vehicle wiring system
•  Supports correct operation of the heated rear window circuit
•  Helps supply power to the rear screen demister
•  Restores proper electrical connection where the original harness is damaged
•  Helps improve rear visibility by supporting demister function
•  Replaces brittle, cut, corroded, or modified original wiring
•   OE Match replacement for classic Porsche electrical restoration.

Why Replace This Part?
Original wiring harnesses can become brittle, cracked, corroded, overheated, or damaged after decades of use. Poor connections in the rear window heater relay harness may cause the heated rear window to stop working, operate intermittently, or suffer from voltage drop. Replacing the harness helps restore reliable relay connection and supports correct demister operation.

When to replace:
•  The rear window heater or demister is not working
•  The relay wiring is brittle, cracked, corroded, or damaged
•  The harness has been cut, modified, or repaired incorrectly
•  Electrical terminals are loose, burnt, or oxidised
•  The rear window heater relay has been replaced
•  The vehicle wiring loom is being restored
•  The car is undergoing classic Porsche electrical or interior restoration

Where it fits on the car
This harness fits in the rear window heater electrical system, connecting the relay for the heated rear window circuit. It is used as part of the rear screen heater / demister wiring on Porsche 911 models from 1971 to 1973.

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Related, superseded, cross reference or alternative numbers for comparison.

91161205400

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