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Relays / Fuses
- Porsche 356A 1955-59
- Porsche 356B 1959-63
- Porsche 356C 1963-65
The OE Match Fuse Box is an original-style Bakelite 12-pole fuse box designed for classic Porsche 356 electrical systems.
Fits:- Porsche 356 A/B/C 1.5-1.6 01/55-12/65
Manufactured to reproduce the appearance and layout of the period fuse box, it provides a suitable replacement for an original unit that has become cracked, burnt, corroded or electrically unreliable while helping retain the authentic appearance of the vehicle's electrical installation.
The fuse box forms a central part of the vehicle's electrical protection system. Individual electrical circuits are routed through replaceable fuses so that excessive current can interrupt the affected circuit before wiring or electrical components suffer more serious damage.
On vehicles now approaching or exceeding sixty years of age, deterioration of the original fuse block, terminals and connections can contribute to intermittent electrical problems, excessive resistance and heat generation.
Replacing a damaged fuse box helps restore secure fuse retention, reliable electrical connections and proper circuit protection.
What This Product Does:
The fuse box provides a secure location for the vehicle's electrical fuses and associated wiring connections.
It is designed to:
- Hold the vehicle's individual electrical fuses securely.
- Distribute electrical power between protected circuits.
- Provide connection points for the vehicle wiring harness.
- Allow each circuit to be protected by the correct fuse rating.
- Interrupt electrical current if a protected circuit becomes overloaded.
- Help protect wiring from excessive current.
- Provide convenient access for fuse inspection and replacement.
- Replace a cracked, burnt or corroded original fuse block.
- Maintain the period-correct appearance of the Porsche 356 electrical system.
- Support reliable operation of lighting and other fused electrical equipment.
Symptoms Of Wear Or Failure:
Possible symptoms include:
- Intermittent electrical equipment operation.
- Lights occasionally cutting out.
- Electrical accessories working when the fuse is moved or touched.
- Poor fuse contact.
- Fuses sitting loosely in their holders.
- Corroded fuse terminals.
- Green or white oxidation around electrical connections.
- Burnt or blackened terminals.
- Heat discolouration.
- Cracked Bakelite housing.
- Broken fuse-retaining clips.
- Loose wiring terminals.
- Melted or damaged fuse ends.
- Fuse box becoming unusually warm.
- Voltage drop across a fuse connection.
- Electrical circuits operating weakly or inconsistently.
- Complete loss of an otherwise functional circuit.
- Evidence of previous overheating or electrical repair.
Why Replacement Matters:
A deteriorated fuse box can undermine the reliability of the entire electrical system.
Replacing a damaged unit helps restore:
- Secure fuse retention.
- Clean electrical contact.
- Reliable circuit continuity.
- Proper circuit protection.
- Reduced electrical resistance.
- Reduced risk of localised overheating.
- Correct wiring support.
- Reliable operation of fused electrical equipment.
- Period-correct appearance.
For a restored Porsche 356, replacing an unreliable or badly damaged fuse block can prevent repeated electrical troubleshooting and provide a dependable foundation for the rest of the wiring system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64461280100
The product you are viewing cross references to these numbers
- Porsche 356A 1955-59
- Porsche 356B 1959-63
This kit is assembled with 2 Bosch relays. This reduces the current running through the headlight switch minimizing premature failure and improving lighting efficiency. Mounts to the fuse panel using high-strength double sided adhesive. No drilling required to mount
Fits:
Porsche 356 1955-61
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
64461511000
The product you are viewing cross references to these numbers
Relays and Fuses – Electrical Protection and Performance for Porsche Vehicles
Relays and fuses are critical components in your Porsche’s electrical system, ensuring that power is delivered safely and reliably to every circuit. From the ignition and lighting systems to the fuel pump and cooling fans, these components protect wiring and electrical modules from overload, short circuits, and potential failure.
At Design911, we stock a comprehensive selection of genuine and high quality relays and fuses for all Porsche models - including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each part is built to the highest standards to ensure dependable performance and precise compatibility with your vehicle’s electrical system.
What Do Relays and Fuses Do?
Fuses act as the first line of defence in your vehicle’s electrical circuits. They break the circuit when current exceeds safe levels, preventing damage to components or wiring.Relays act as electronic switches that control high-current devices using low-current signals. They allow systems like headlights, fuel pumps, fans, and wipers to operate efficiently without overloading the control switches.
Together, they form a vital network that maintains safety, functionality, and reliability across your Porsche’s electrical system.
Why Do Relays and Fuses Fail?
Over time, electrical components are subject to wear, heat,
and environmental factors that can lead to failure. Common causes include:
- Overheating
or overcurrent loads blowing the fuse.
- Aging
or corroded relay contacts leading to intermittent operation.
- Moisture
ingress or corrosion within the fuse box or relay socket.
- Vibration
or mechanical stress loosening connections.
- Electrical short circuits caused by wiring faults or damaged insulation.
Symptoms of faulty relays or fuses can include malfunctioning lights, non-start conditions, intermittent accessory operation, or completely dead electrical systems.
Why Replace Faulty Relays and Fuses?
Replacing worn or damaged relays and fuses is essential to maintain your Porsche’s electrical integrity and prevent more serious system failures. Using quality replacements ensures proper current flow, system protection, and long-term reliability.
Benefits of replacement include:
Restored
function of electrical systems and accessories.
Protection
from wiring damage or electrical fires.
Enhanced
safety and dependability.
High-level
quality and fitment for lasting performance.
Every relay and fuse in this range is precision-tested and manufactured to match factory specifications, ensuring seamless compatibility and peace of mind on the road.
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Fuel Pumps
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Brake Light Switch
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Reverse Light Switch
-
Headlamp Switch
-
Window Mechanism
-
Wiper Motor
-
Wiper Mechanism
-
Electric Horn
-
Ignition Switch
-
Indicator / Wiper Stalk Switch
-
Washer pumps / bottles / jets
-
Alarms / Security / Central Locking
-
Electronic Control Units
-
Dashboard / Console Parts & Switches
-
Tracker
-
Connector housing
-
Wiring harness
