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Kroon Wire Harnesses BV

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Kolham
Kroon Wire Harnesses BV

Electrical wiring for classic Porsche
(2)

14/06/2026

Hard starting issues on your classic Porsche?

The problem is often not the starter itself, but the high current required by the starter solenoid.
From the factory, this current passes directly through the ignition switch. Over time, this can cause voltage drop, worn contacts, inconsistent starting, and eventually ignition switch failure.
Our Plug & Play External Start Relay solves this problem by routing the heavy starter solenoid current through a dedicated relay instead of the ignition switch. The ignition switch only has to trigger the relay, significantly reducing electrical load and extending its service life.
Benefits:
✔ Prevents hard and intermittent starting
✔ Reduces voltage drop to the starter solenoid
✔ Protects your valuable ignition switch
✔ Improves starting reliability
✔ Fully Plug & Play installation
✔ Typical installation time: around 5 minutes
✔ No modifications required
Available in:
• 12V version for Porsche 911 and 912 models from the earliest SWB cars through the final air-cooled generations
• 6V version for Porsche 356 models
A simple, affordable upgrade that delivers a surprisingly big improvement in reliability.

Small upgrade. Big difference.

Order it in our webshop, article number, RELSTM12v (€59,-) and RELSTM6V )€69,-)

Www.kroonwireharnesses.com

11/06/2026

Built for competition. Engineered by specialists.
This special 1968 Porsche 911 SWB was equipped with a fully custom electrical system designed and manufactured by our wiring specialists.
The complete wiring solution includes:
• FIA Master Switch
• 123 Ignition System
• Electric Fuel Pump
• ATO LED Fuse Panel
• Headlight Relay Set
• Multiple custom race and rally modifications

At Kroon Wire Harnesses, we do much more than reproduce original Porsche wiring harnesses. We specialize in designing and manufacturing bespoke electrical systems for historic race cars, rally cars, and high-performance Porsche projects worldwide.
Whether your project requires additional safety equipment, modern ignition systems, fuel injection conversions, auxiliary lighting, data logging, navigation, we can integrate everything into one professionally engineered harness.

Every harness is built in-house using high quality materials, factory-style construction methods, and decades of Porsche electrical experience.

From concours restorations to FIA competition cars, we deliver wiring solutions that perform when it matters most.
Kroon Wire Harnesses… where classic Porsche electrics meet modern engineering!

11/06/2026

The Porsche 944S was a special model in the 944 lineup. Introduced for the 1987 model year, it featured the newly developed 2.5-liter 16-valve engine producing 190 horsepower, making it one of the most exciting naturally aspirated transaxle Porsches of its era. With its perfect weight distribution, sharp handling, and impressive performance, the 944S remains a favorite among Porsche enthusiasts today.

This week our wiring specialists completed another brand-new engine harness for a 1987 Porsche 944S, part number 944.607.040.01.
Manufactured to OEM specifications using high-quality materials, correct connectors, terminals, sleeves, and grommets, this harness is a direct replacement for the original and ensures reliable operation for years to come.

Did you know that we can supply engine harnesses for all Porsche 944 model years? Whether you own an early 2.5L car, a 944S, Turbo, S2, or one of the later variants, we have the expertise, documentation, and production capability to manufacture an exact replacement harness.

Because when it comes to classic Porsche wiring, details matter.
Part Number: 944.607.040.01

10/06/2026

The Porsche 924S is often overlooked, but it represents one of the best-balanced transaxle Porsches ever built.
Introduced in 1986, the 924S combined the lightweight body of the original 924 with the powerful 2.5-liter engine from the Porsche 944. The result was a nimble sports car with excellent weight distribution, impressive handling, and the unmistakable driving characteristics Porsche enthusiasts appreciate to this day.
Our wiring specialists have recently completed this brand-new engine harness for a 1986 Porsche 924S equipped with the M44.07 / M44.08 engine.
Part Number: 944.607.030.01
Manufactured using OEM-style materials and connectors, this harness is built to match the original Porsche specifications while providing the reliability expected from a brand-new wiring loom.
✔ Exact replacement
✔ OEM-style appearance
✔ Correct connectors and wire colors
✔ Manufactured in-house by our wiring specialists
✔ Ready for many more years of reliable service
Keeping classic Porsches on the road, one wire harness at a time.
www.kroonwireharnesses.com

04/06/2026

Introducing our new Fender Mounted Cibie Harness, developed specifically for classic Porsche 911 G Model applications.
Part Number: CIBIEGFENDER
This harness is designed to be installed directly in the front fuse panel when an unused mounting position is available. The kit is supplied complete with:
• Relay
• Rubber grommets
• Extra wire length to each lamp for easy installation
• Individually fused lamp circuits with inline fuses
• OEM style appearance
• High quality materials and connectors

Each Cibie lamp is protected by its own dedicated inline fuse, providing maximum safety and reliability.

As with all Kroon products, the harness is manufactured with attention to detail and designed for straightforward installation in your classic Porsche.

Where you’re lost in the wiring, we’ll help you find the way again.

03/06/2026

Another complete wiring harness set is ready to leave our workshop.
This time our wiring specialists have produced a complete wiring harness set for a 1962 Porsche 356BT Cabriolet, destined for South Paramus, New Jersey, USA.
Built exactly to original factory specifications, this harness preserves the authentic look, fit and function of the original Porsche wiring. At the same time, additional wiring has been integrated to support a range of optional accessories and upgrades, providing greater flexibility without compromising originality.
Every wire, connector and branch has been carefully engineered and assembled by hand to ensure a perfect fit and long term reliability.
Today this complete set begins its journey across the Atlantic, where it will help bring another beautiful 356BT Cabriolet back to life.
At Kroon Wire Harnesses, we are proud to supply wiring solutions for classic Porsches all over the world.

03/06/2026

Classic looks. Modern technology.

Our new ATO LED Fuse Panel for the Porsche 911 and 912 Short Wheel Base models from 1964 to 1968 brings a smart upgrade to one of the most important electrical systems in your car.
A blown fuse is now incredibly easy to find thanks to the integrated LED indication on every individual fuse. No more searching, no more guessing.
The panel also features our built in headlight relay set, allowing your headlights to shine brighter while reducing the load on the original headlight switch and wiring.
To preserve the factory appearance, the panel is supplied with an original looking fuse box cover. From the outside it looks period correct, but underneath you benefit from modern reliability and functionality.
Ordering a new wiring harness together with this fuse panel? We can fully pre wire and connect everything for you before delivery, making installation even easier.

Designed for Porsche 911 and 912 SWB models 1964 to 1968.

Kroon Wire Harnesses, where classic appearance meets modern engineering.

02/06/2026

One of our customers in England was faced with a major challenge after a serious electrical fire under the front hood of a 1989 Porsche 911 Carrera 3.2 RHD.

At first glance, this might seem like a disaster. After all, where do you find brand-new wiring harnesses for a right hand drive Carrera 3.2 more than 35 years after it left the factory?

No problem. At Kroon, we have them.
And if a specific harness is no longer available, we simply engineer and manufacture it ourselves, exactly as Porsche originally did. Every wire, every connector, every detail reproduced as close to the factory specification as possible.

It takes time, patience, and a lot of engineering work, but the result is worth it: a wiring harness that looks, fits, and functions exactly like the original.
Whether your Porsche is left hand drive, right hand drive, common, rare, or somewhere in between, Kroon has you covered.

Because every classic Porsche deserves the correct wiring !

28/05/2026

The Porsche 924 may have started life as an entry level Porsche, but today these early transaxle models are becoming increasingly appreciated by enthusiasts worldwide. With their lightweight construction, perfect weight distribution and unmistakable 1970s styling, the first generation 924 models have earned their place in Porsche history.
At Kroon Wire Harnesses we certainly do not forget the early Porsche 924 models. We proudly manufacture high quality wiring harnesses for virtually every classic Porsche ever built, including the complete range of early 924 K Jetronic models.

This particular engine harness, part number 477.971.761.B, is suitable for all Porsche 924 K Jetronic models from 1976 to 1977 and is manufactured to OEM specifications for perfect fitment and reliability.
✔ OEM style production
✔ Correct connectors and wire colors
✔ Ready for installation
✔ Manufactured in The Netherlands
✔ Worldwide shipping

Whether it is a 356, early 911, 930 Turbo or Porsche 924, we produce wiring harnesses for them all

27/05/2026

Two complete right-hand drive wiring harness sets delivered to one of the best known Porsche specialists in England.
One set for a 1972 Porsche 911S and another for a 1973 Porsche 911S.
For us, it does not matter if a classic Porsche is left-hand drive or right-hand drive. We can build them all.
From the rear of the car, a RHD wiring harness is completely identical to a LHD version. But at the front of the car, things become very different. Even though the fuse panel remains in the same location, nearly all other electrical components are positioned differently. Gauges, switches, controls and dashboard wiring all require a completely different layout and routing.
That is exactly what makes these early RHD 911S harnesses so unique and technically interesting.

Adres

Albert Plesmanlaan 9
Kolham
9615TJ

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Maandag	07:00 - 17:00
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+31634341865

Website

http://www.kroonwireharnesses.com/

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