13-Pin Trailer & Tailgate Power Connector – ISO 11446 Female OEM
The 13-pin trailer connector is the European standard (ISO 11446) for all towing electrical connections on modern vehicles, replacing the older 7-pin system. This female 13-pin connector integrates trailer lighting, brake, reverse, auxiliary power, and electric brake circuits in a single sealed housing. Available bare or with 15cm pre-wired leads for direct splice-in installation.
ISO 11446 is the European standard defining the 13-pin trailer connector used on passenger cars, SUVs, and light commercial vehicles across the EU. It supersedes the older 7-pin DIN 72570 connector by adding reverse light, permanent battery power (pin 9), ignition-switched power (pin 12), and electric trailer brake control (pin 13) — enabling electric trailer brakes, trailer battery charging, and refrigeration unit power that the 7-pin system cannot support.
| Attribute | Detail |
|---|---|
| Pin Count | 13-Pin |
| Standard | ISO 11446 (European 13-pin trailer connector) |
| Gender | Female |
| Housing Material | Nylon (PA66), weatherproof |
| Wire Option | Bare connector / 15cm pre-wired leads |
| Application | Electric tailgate, trailer power harness |
| Current Rating | Up to 15A (pins 9 & 12) |
| Pin | Function | Circuit Type |
|---|---|---|
| 1 | Left turn signal / hazard | Switched |
| 2 | Rear fog light | Switched |
| 3 | Earth (ground) for pins 1, 2, 4 | Ground |
| 4 | Right turn signal / hazard | Switched |
| 5 | Right side / tail light | Switched |
| 6 | Brake light | Switched |
| 7 | Left side / tail light | Switched |
| 8 | Reverse light | Switched |
| 9 | Permanent +12V (battery power) | Permanent power, up to 15A |
| 10 | Earth (ground) for pins 5, 6, 7, 8 | Ground |
| 11 | Earth (ground) for pins 9, 12, 13 | Ground |
| 12 | Ignition-switched +12V (ACC power) | Ignition-switched, up to 15A |
| 13 | Trailer brake / electric brake control | Brake control signal |
The 13-pin connector is mounted at the vehicle's rear, fully exposed to road spray, mud, salt, and mechanical stress from repeated trailer coupling. Pins 9 and 12 carry up to 15A for trailer battery charging and auxiliary power — the combination of high current and moisture exposure makes terminal corrosion the dominant failure mode. Corroded trailer connectors cause intermittent trailer lighting faults, trailer brake failures, and auxiliary power loss — all safety-critical issues for towing operations. Replacing the connector is faster and more reliable than attempting to clean corroded terminals.
| Feature | 7-Pin (DIN 72570) | 13-Pin (ISO 11446) |
|---|---|---|
| Reverse light | ❌ | ✅ Pin 8 |
| Permanent battery power | ❌ | ✅ Pin 9 (15A) |
| Ignition-switched power | ❌ | ✅ Pin 12 (15A) |
| Electric trailer brake | ❌ | ✅ Pin 13 |
| Trailer battery charging | ❌ | ✅ Via pin 9 |
| Refrigeration unit power | ❌ | ✅ Via pin 12 |
Q: Is this compatible with all European 13-pin trailer sockets?
A: Yes. This connector conforms to ISO 11446 and is compatible with all ISO 11446-compliant trailer sockets used across EU vehicles.
Q: Can I use a 13-pin connector on a vehicle with a 7-pin socket?
A: No — 13-pin and 7-pin connectors are not directly compatible. An adapter is required. Most modern European vehicles are fitted with 13-pin sockets from the factory.
Q: What causes pin 9 or pin 12 to fail?
A: High current (up to 15A) combined with moisture ingress causes accelerated terminal oxidation on pins 9 and 12. Symptoms include trailer battery not charging and auxiliary power loss. Replace the connector and apply dielectric grease to prevent recurrence.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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