Autel Trailer PLC Connector

Autel Trailer PLC Connector — J560 7-Way Plug Adapter for Direct Trailer ABS Diagnostics

The Autel Trailer PLC Connector (TrailerPLC) is a J560 Power Line Carrier adapter that connects directly to a trailer's 7-way plug for ABS diagnostic communication — without requiring the tractor to be present. Standard diagnostic access to trailer ABS requires the tractor's power and communication lines to pass through to the trailer. The Trailer PLC Connector provides its own power and communication pathway, letting you plug directly into the trailer's 7-way receptacle and communicate with the trailer ABS ECU independently.

This connector is an accessory for the Autel MaxiSYS MS908CV commercial vehicle diagnostic system (sold separately). It enables the MS908CV to read ABS warning lamp messages from the trailer ECU, clear trailer ABS fault codes, and perform trailer ABS diagnostic work without the tractor in the loop.

How It's Used

Most trailer ABS diagnostic scenarios fall into one of two categories: the trailer is connected to a tractor and you're diagnosing through the full combination, or the trailer is dropped in your yard and you need to diagnose it standalone. For the dropped trailer scenario, the standard approach requires either reconnecting the tractor — which may not be available or convenient — or using a Trailer PLC adapter like this one to power up the trailer electrical system and establish diagnostic communication directly.

• Direct Trailer Connection: Connect the Trailer PLC Connector to the trailer's J560 7-way electrical receptacle. No tractor required for ABS communication.
• Between Tractor and Trailer: Alternatively, insert the Trailer PLC Connector between the tractor's 7-way plug and the trailer receptacle — acting as an in-line diagnostic tap while the combination is connected.
• ABS Warning Lamp Messages: Read the ABS warning lamp status and fault messages from the trailer ECU via the power line carrier communication protocol built into the J560 connector standard
• Trailer ECU Access: Detect and communicate with the trailer ABS control module through the PLC protocol — read codes, view system status, and clear faults as supported by the trailer's ABS system

What Is Power Line Carrier (PLC) Communication?

PLC is a communication method used in heavy-duty trailer ABS systems where diagnostic data is transmitted over the same power lines that run ABS power and ground to the trailer. The SAE J2497 standard defines how trailer ABS ECUs broadcast fault data over the power line. The Trailer PLC Connector picks up these J2497 PLC signals from the 7-way connector and translates them for the MS908CV diagnostic tablet. This is how you get trailer ABS diagnostic access without a separate trailer diagnostic cable run alongside the power lines.

Compatibility

• Required Tool: Autel MaxiSYS MS908CV (sold separately) — the Trailer PLC Connector does not function independently as a diagnostic tool; it's an interface adapter for the MS908CV platform
• Connector Standard: SAE J560 (standard 7-way connector used on virtually all North American Class 5-8 trailers)
• ABS Systems: Compatible with major trailer ABS manufacturers including Bendix, Haldex, Meritor WABCO — any trailer ABS system that broadcasts via SAE J2497 PLC protocol

Technical Specifications

• Connector: J560 PLC adapter, connects to trailer 7-way plug
• Protocol: SAE J2497 Power Line Carrier
• Compatible Platform: Autel MaxiSYS MS908CV
• Warranty: 1 year
• Weight: 0.65 lbs
• Dimensions: 8 x 4 x 2 inches

What's in the Box

• Autel Trailer PLC Connector (J560 to MS908CV adapter)

Why Buy From OEM Diagnostic Tools?

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