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.

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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Related, superseded, cross reference or alternative numbers for comparison.

91161208001

The product you are viewing cross references to these numbers

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.

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

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Related, superseded, cross reference or alternative numbers for comparison.

91161202901

The product you are viewing cross references to these numbers

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

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Related, superseded, cross reference or alternative numbers for comparison.

91161207801

The product you are viewing cross references to these numbers

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.