Wiring harness

Air conditioning relay wiring harness loom.

Fits:
Porsche 911 - 1974 to 1984
Porsche 911 turbo - 1974 to 1984

Loom - NR 80

Complete harness from fusebox to relay socket (AC control relay) and 2 pole female connector.
As original coloured wiring.

Original neoprene terminal sleeves used, (no shrink wrap)

High quality flex automotive grade wiring, ISO6722:2002 / DIN72551/6 / EEC directive 2000/53

Gasoline, oil, battery acid, engine coolant resistant.

The high flex sleeving is very resistant to solvents and free of halogen, sulphur and phosphorous.

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Diagram ref no 1

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91161208001

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Air conditioning thermo switch wiring harness loom - Left Hand Drive (LHD)



Fits:
Porsche 911 - 1978 to 1989
Porsche 911 turbo - 1978 to 1989

Wiring Harness Nr. 29
Thermo Bi-metal Switch - Left hand Drive

Model: M559 - 1978-1989, Air conditioner

Special order made to order parts please allow 2 – 4 weeks

Handmade to concourse quality.

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Diagram ref no 12

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Air conditionong wiring harness loom.

Fits:
Porsche 911 - 1974 to 1984
Porsche 911 turbo - 1974 to 1984

Loom - NR 78

Complete harness from fusebox to AC control relay and 6 pole female connector.

As original coloured wiring.
Original neoprene terminal sleeves used, (no shrink wrap)
High quality flex automotive grade wiring, ISO6722:2002 / DIN72551/6 / EEC directive 2000/53
Gasoline, oil, battery acid, engine coolant resistant.
The high flex sleeving is very resistant to solvents and free of halogen, sulphur and phosphorous.

Special order made to order parts please allow 2 – 4 weeks

Handmade to concourse quality.

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

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911 Break Out Box - Not to be missed in every Porsche workshop
The 911 Break Out Box is a professional-grade diagnostic tool for Porsche 911 and 930 models built from 1970 to 1989. By inserting the breakout harness between the original 14-pin connector and the vehicle’s wiring, the electrical system remains fully operational while you perform precise measurements and troubleshooting. Built with superb, durable quality, this tool is designed for everyday workshop use.

Fits:
Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Porsche 911 1978-1983 3.0L / SC
Porsche 911 1984-1986 3.2L
Porsche 911 1987-1989 3.2L G50
Porsche 911 1975-1977 3.0L Turbo (930)
Porsche 911 1978-1989 3.3L Turbo (930)

What the Product Does

• Quick Diagnostics: Allows easy access to electrical circuits without disrupting the system.
  
• Safe Testing: Features 4mm banana socket plugs for reliable voltage, continuity, and resistance measurements.
  
• Built-in Features: Includes an LED voltmeter for quick battery voltage checks and an illuminated start button for controlled cranking or starting.
  
• Accurate Mapping: Test connections correspond exactly to the original 14-pin connector layout.
  
• Complete Kit: Comes with ground lead and detailed wiring diagrams for straightforward use.
  

The LED voltmeter lets you monitor battery voltage at a glance.
Easily test and measure:

• Starter circuit
• Oil pressure & oil temperature
• Backup light
• Oil level sensor
• Sportomatic system
• RPM signal
• WUR (Warm-Up Regulator)
• Engine fan
• Alternator field current

Symptoms That Require a Break Out Box

• Intermittent starting or electrical faults not traceable by standard tools.
• Sensor or wiring issues causing irregular engine performance.
• ECU or relay miscommunication requiring deeper circuit access.
• Need to test voltage or signal continuity without removing components.

Common Reasons for Failure or Replacement

• Workshop Wear: Connectors, pins, or sockets can wear out from heavy use.
  
• Damage: Drops, bent contacts, or improper storage may affect accuracy.
  
• Aging Tools: Older breakout boxes may not provide stable readings.
  
• Reliability Issues: A faulty or low-quality unit risks misdiagnosis.

Why  Invest in One?

• Provides accurate, safe diagnostics while keeping the car operational.
  
• Saves time by pinpointing wiring and sensor faults quickly.
• Prevents unnecessary replacement of expensive electrical parts.
• Essential for professional Porsche service shops and serious restorers.
• Ensures long-term reliability with a durable, workshop-ready design

Ideal For: Porsche 911/930 specialists, restorers, and workshops needing precise, repeatable electrical testing beyond standard OBD methods.

Cable tie wrap. 



Fits:
Porsche 911 - 1970 to 1989
Porsche 914 - 1970 to 1976
Porsche 928 - 1978 to 1995
Porsche 996 GT3 - 1999 to 2005
Porsche 997 turbo - 2007 to 2013

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Diagram ref no 13

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Diode for rear window wiper.



Fits:
Porsche 911 1974-89



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Electric window power supply wiring harness loom.



Fits:
Porsche 911 - 1969 to 1975

Power supply harness.
This harness in installed in the trunk and supplies both doors, it has a round female 6 pole connector on the left and right.

It is connected to the front fusebox and ground studs (8mm eyelet) on both sides.

Other side of this harness needs to be connected to the terminal strip inside the door.

Handmade to concourse quality.

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Engine bay lamp wiring harness loom.

Fits:
Porsche 911 1974 to 1989

Harness from left rear light (tunnel harness) to engine bay light in engine lid & ground.

Diagram ref no 1

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Engine Bay Lamp Wiring Harness Loom.

Fits:
Porsche 911 1974>>1985

Diagram Ref No 1

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External starter motor relay.
Bypass your expensive ignition switch and install a hot start relay that will lead the current directly to the starter.
We have a 6 or 12 volt version and it works in any classic.

Fits:
Porsche 911 / 924 / 928 / 914 / 944 / 968 / 356

This relay can be placed near the starter motor and is used to limit the starting current and no longer allow it to be switched via the ignition switch.

Fog light additional beam wiring harness
This Genuine Porsche fog light wiring harness, also referred to as a fog light additional beam wiring harness or front fog lamp harness - is used to connect the front fog light / additional beam lighting circuit, helping provide the correct factory-style electrical connection for the fog lamps.

Fits:
Porsche 911 1974 - 1986

Diagram ref no 2

This harness is used to connect the fog light circuit to the relevant wiring points, including the fuse box, relay socket, switch, ground connection and left/right fog lights where applicable.

Functions:
•  Provides the wiring connection for the front fog lights / additional beam lamps
•  Connects the fog light circuit into the vehicle electrical system
•  Supports correct operation of the fog lamps from the dashboard switch
•  Provides wiring paths to the left and right fog light units
•  Helps maintain safe and reliable lighting performance
•  Restores the factory-style wiring layout for classic Porsche 911 models
•  Helps replace damaged, missing, modified or aged fog light wiring.

Why Replace This Part?
Original fog light wiring can become brittle, cracked, corroded or damaged after decades of use. Previous repairs or modifications may also leave the fog light circuit unreliable or non-original. A poor wiring harness can cause intermittent fog light operation, blown fuses, poor grounding or complete lighting failure. Replacing the harness with a Genuine Porsche OE fog light wiring harness helps restore correct electrical routing, secure connections and original-style lighting function.

When to replace
•   This Part If the front fog lights are not working correctly
•   If fog light wiring is damaged, brittle, cut or missing
•   During fog light installation or restoration
•   When replacing front fog lamps or lighting components
•   If previous wiring repairs are incorrect or non-original
•   During classic Porsche 911 electrical system restoration
•   If there are intermittent lighting faults, poor connections or fuse issues

Where It Fits on the Car
This harness fits in the front lighting/electrical system of the vehicle. It is associated with the front fog light / additional beam circuit, connecting the fog lights to the electrical supply, switching and relay/fuse system.

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Fog light additional beam wiring harness
This OE Match fog light / additional beam wiring harness is a replacement electrical loom used on Porsche 911 models from 1974 to 1986. It is designed to connect the front fog lights or additional beam lamps into the vehicle’s lighting electrical system, matching the original-style wiring layout and function.

Fits:
Porsche 911 1974 - 1986

Diagram ref no 2

The wiring harness provides the electrical connection needed for the fog lights or additional driving lights to operate correctly. It helps deliver power and signal connection between the lighting switch, relay, fuse circuit, and front lamp units, depending on the vehicle specification.

Functions
• Connects front fog lights or additional beam lamps to the vehicle wiring system
• Supports correct operation of auxiliary front lighting
• Helps restore original lighting circuit function
• Replaces brittle, damaged, cut, corroded, or modified wiring
• Provides correct OE Match routing and connection style
• Supports reliable power delivery to the lamps
• Suitable for lighting repair, restoration, or retrofitting where applicable

Why Replace This Part?
Original lighting harnesses can become brittle, cracked, corroded, overheated, or damaged after years of use. Poor wiring or bad connections can cause fog lights to fail, flicker, work intermittently, or suffer from voltage drop. Replacing the harness helps restore safe, reliable operation of the front auxiliary lighting system and improves the quality of a classic Porsche electrical restoration.

When to replace:
•  Fog lights or additional beam lamps do not work
•  Lamps flicker or operate intermittently
•  Wiring is brittle, cracked, cut, melted, or corroded
•  Connectors are loose, damaged, burnt, or oxidised
•  The front lighting system is being restored or repaired
•  The vehicle has incorrect aftermarket wiring fitted
•  Fog lights or additional driving lights are being refitted
•  The car is undergoing classic Porsche electrical restoration

Where it fits on the car
This harness fits in the front lighting electrical system of the vehicle. It is used to connect the fog light or additional beam lamp circuit to the front lamp units and related electrical components, such as the switch, relay, or fuse circuit depending on specification.

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SC Style Front Fuel Pump Loom Upgrade – Improved Fuel Pump Wiring Solution

High-quality SC-style front fuel pump loom upgrade, designed to improve the reliability, safety, and performance of the fuel delivery system on classic Porsche 911 models.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera

This upgrade replicates the improved wiring layout found on later 911 SC models, relocating and optimising the fuel pump electrical supply to ensure more consistent voltage delivery and safer operation.

The loom can be integrated into the original ignition circuit, allowing the fuel pump to operate correctly in line with ignition status, enhancing both safety and functionality.

Key Features

• SC-style front fuel pump wiring upgrade
• Improves electrical supply to fuel pump
• Can be wired into original ignition circuit
• Enhances reliability and fuel delivery consistency
• Reduces load on original wiring
• Ideal for classic 911 upgrades and restorations
• High-quality wiring and connectors
• Designed for straightforward installation

Function and Purpose

This loom upgrade improves the performance of the fuel pump circuit.

It helps to:
• Deliver consistent voltage to the fuel pump
• Reduce strain on aging factory wiring
• Improve fuel pump efficiency and reliability
• Enable ignition-controlled pump operation
• Enhance overall system safety

Why Upgrade to SC-Style Fuel Pump Wiring

Early Porsche 911 wiring setups can suffer from voltage drop and reliability issues.

Benefits of this upgrade include:
• Improved fuel pump performance
• More stable electrical supply
• Reduced risk of wiring failure
• Enhanced safety through ignition control
• Modernised system while retaining OEM logic

This makes it a highly recommended upgrade for both restored and regularly driven classic 911s.

8 wire gauge illumination harness with bulb sockets - Bulbs not included.



Fits:
Porsche 911 1974-86

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Diagram ref no 19

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Hazard warning relay plug socket 4 pole.



Fits:
Porsche 911 - 1970to 1989
Porsche 964 - 1990 to 1994
Porsche 968 - 1992 to 1995
Porsche 914 - 1970 to 1976
Porsche 924S - 1986 to 1988
Porsche 944  - 1982 to 1991

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Ignition switch wiring harness loom.



Fits:
Porsche 911 - 1976 to 1984
Porsche 911 turbo - 1976 to 1984 (including)

Harness with 6 pole male connector that connects to ignition switch and comes with original colour coded wiring.

Harness will fit exactly like the original with the wire tube and oil resistant tape as original.

Terminals have rubber sleeves.

Harness comes with detailed connection instructions.

Special order made to order parts please allow 2 – 4 weeks

Handmade to concourse quality.

Click 'Zoom in' for large parts diagram.
Diagram ref no 4

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