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Wiring Harness / Cables
Alternator wiring harness
This newly manufactured replacement provides the electrical connections required between the alternator, regulator circuit and associated charging-system components.
Fits
- Porsche 914 1970–76
What This Product Does
The harness carries charging-system current and electrical signals through the generator and regulator circuit. It replaces ageing original wiring where insulation, terminals or protective grommets have deteriorated through decades of heat, vibration and use.
Functions
- Connects the alternator to the associated charging circuit
- Provides the required generator and regulator wiring connections
- Protects routed cables where they pass through surrounding panels
- Helps maintain secure electrical contact within the charging system
Technical Details
- New reproduction alternator wiring harness
- Supplied with both protective grommets
- Includes the necessary electrical connectors for direct installation
- Diagram description: generator and regulator line set
- Quantity required: one per vehicle
Symptoms of Fault
- Intermittent or weak battery charging
- Battery warning light remaining illuminated
- Voltage drop across the alternator circuit
- Brittle, cracked or heat-damaged wire insulation
- Corroded terminals or damaged connector housings
- Electrical operation changing when the harness is moved
- Exposed conductors or signs of overheating near connections
Why Replacement Matters
Old alternator wiring may develop internal breaks, excessive resistance or unreliable terminal contact. Replacing a deteriorated harness can restore the intended electrical route and reduce intermittent charging faults. Battery condition, earth connections, belt tension, alternator output and regulator operation should also be checked before installation.
FAQs
- Does the harness include connectors and grommets?
Yes. It is supplied with the necessary connectors and two protective grommets. - How many harnesses are needed?
One alternator wiring harness is required per vehicle. - Can damaged wiring cause charging problems?
Yes. Corrosion, fractured conductors and increased resistance may cause intermittent or insufficient charging. - Should the alternator be tested before replacing the harness?
Charging voltage, battery condition, earth points and regulator operation should be tested so that the source of the fault is confirmed. - What should be inspected during fitting?
Check the terminals, connector seating, cable routing and grommet position, ensuring that the harness is kept away from abrasion and excessive heat.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
021971349D
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Pipe Clamp B20x18 – Multi-Position Clamp
Sold each
High-quality
pipe clamp B20x18 designed for a wide range of securing applications across Porsche 911, 924S, 928, and
914 models.
This versatile clamp is used in multiple locations including
air conditioning pipes, wiring looms, power steering lines, clutch cables,
and heating system components, making it an essential part for maintaining
correct routing and system integrity throughout the vehicle.
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
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
Manufactured to OEM specifications, this clamp ensures secure fitment, durability, and resistance to corrosion. Supplied individually, it allows flexible replacement for maintenance, repair, or restoration projects.
Key Features
• Pipe clamp size B20x18
• Suitable for Porsche 911, 924S, 928, and 914
• Part number 99951107602
• Multi-use: AC pipes, wiring looms, steering, clutch, heating
• Ensures secure mounting and routing
• Durable and corrosion-resistant construction
• OEM-style fit and performance
• Sold individually
Function and Purpose
This clamp is designed to secure various components across the vehicle.
It helps to:
• Hold pipes, hoses, and cables firmly in place
• Maintain correct routing and alignment
• Prevent vibration-related wear and damage
• Protect sensitive components such as wiring looms
• Support long-term system reliability
Why Replace Pipe Clamps
Clamps can degrade over time due to heat and environmental exposure.
Common issues include:
• Loss of clamping strength
• Corrosion or fatigue
• Movement of pipes or cables
• Increased risk of wear or failure
Replacing worn clamps ensures proper securing and protects system components.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99951107602
The product you are viewing cross references to these numbers
- 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
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914/6
Made in Canada
Click 'Zoom in' for large parts diagram.
Diagram ref no 2
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461204610
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Includes all connector boots, PVC sheathing, high grade automotive wire, flat braided ground cable and contacts per the original specifications. Compatible with cars up to 1973.
Fits:
Porsche 911 1965-73
Porsche 914/6 1971-75
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91161205000
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914//6
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461201910
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914 2.0L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
039791761
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 911 - 1965 to 1973 - (alternator)
Porsche 911 turbo - 1987 to 1989 (intercooler)
Porsche 914 - 1970 to 1976
Click 'Zoom in' for large parts diagram.
Diagram ref no 18 or 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
90161211000
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914 2.0L
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461200715
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
Shop Securely
12 Month Warranty
Worldwide Delivery
Fits:
Porsche 914-4 (1972)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91461200713
The product you are viewing cross references to these numbers
- Porsche 914 (1970-1976)
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12 Month Warranty
Worldwide Delivery
Wiring Harnesses & Cables – Reliable Electrical Connectivity for Porsche Vehicles
Wiring harnesses and cables are the lifeblood of your Porsche’s electrical system, transmitting power and data between critical components such as sensors, lights, ignition systems, and control modules. A healthy wiring system ensures reliable communication across all vehicle systems — from the engine to interior electronics — maintaining performance, safety, and comfort.
At Design911, we supply an extensive range of genuine and high-quality wiring harnesses and cables for various Porsche models, including 911, Boxster, Cayman, Cayenne, Macan, and Panamera models. Each harness and cable is precision-engineered for durability, exact fitment, and optimal electrical conductivity to keep your Porsche performing at its best.
What Do Wiring Harnesses and Cables Do?
Wiring harnesses and cables connect all
electrical and electronic systems within your Porsche, ensuring dependable
power distribution and signal transmission. Their key roles include:
- Delivering electrical power from the battery and alternator to essential systems.
- Transmitting data signals between the ECU, sensors, and modules.
- Supporting lighting, ignition, and climate control circuits.
- Reducing wiring complexity by grouping circuits into one protected unit.
A well-maintained harness ensures stable voltage delivery, preventing power losses, short circuits, and intermittent faults.
Why Do Wiring Harnesses and Cables Fail?
Due to exposure to vibration, heat, and
environmental elements, wiring and cables naturally degrade over time. Common
causes of failure include:
- Corrosion or oxidation on terminals and connectors.
- Broken or frayed wires from movement or mechanical stress.
- Insulation cracking due to heat and age.
- Rodent damage or external wear from abrasion.
- Water ingress leading to short circuits and poor conductivity.
Symptoms of wiring failure can include intermittent electrical faults, warning lights, non-functioning accessories, or complete electrical system failure.
Why Replace
Damaged Wiring Harnesses or Cables?
Replacing worn or damaged wiring ensures
electrical reliability, safety, and proper communication between all systems.
Faulty wiring can lead to voltage drops, malfunctions, or even electrical fires
if left unchecked.
Benefits of replacement include:
- Restored electrical performance and reliability.
- Prevention of intermittent faults and short circuits.
- Improved signal integrity for sensors and control units.
- Long-lasting durability with manufacturer-quality construction.
All wiring harnesses and cables in our range are built using high-quality copper conductors, heat-resistant sheathing, and precision connectors, ensuring exceptional reliability under all conditions.
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Saturday: Closed
Sunday: Closed