Automotive Connector Back Cover – 13719691, Waterproof Housing Rear Seal for Female Socket Cable Plug

Part number 13719691 is an automotive connector back cover (rear seal / secondary lock cover) for waterproof female socket connector housings. The back cover serves two functions: (1) it provides the primary rear seal, compressing the individual wire seals around each conductor to achieve IP67 waterproofing; (2) it provides secondary terminal retention, preventing terminals from backing out of the housing under vibration and cable pull forces. Back covers are a critical component of waterproof connector assemblies — a connector without its back cover will not achieve IP67 sealing and may experience terminal push-back.

Key Specifications

• Part Number: 13719691
• Component Type: Connector back cover / rear seal / secondary lock
• Application: Female socket connector housing (specific housing as per part number)
• Material: PA66 nylon, flame retardant
• Function: IP67 rear seal + secondary terminal retention
• Application: Truck, agricultural, and industrial vehicle OEM wiring harnesses

Back Cover Functions in Waterproof Connectors

• IP67 rear sealing: The back cover compresses the wire seals (individual rubber seals around each conductor) against the housing rear face. Without the back cover, the wire seals are not compressed and water can enter through the rear of the housing.
• Secondary terminal retention: The back cover locks over the terminal locking lances, preventing terminals from being pushed back through the housing under cable pull forces. This is the “secondary lock” function — the primary lock is the terminal’s own lancing lance.
• Cable strain relief: The back cover provides a clamping surface that distributes cable pull forces across the housing rather than concentrating them on individual terminal locking lances.

Frequently Asked Questions

Can I use a connector without its back cover?

Not recommended. Without the back cover: (1) the connector will not achieve IP67 sealing — water can enter through the rear; (2) terminals may push back under cable pull forces, causing intermittent connections; (3) the connector may not meet OEM specifications for the application. Always install the back cover before mating the connector. If the original back cover is lost or damaged, order a replacement before returning the connector to service.

How do I install a connector back cover?

After loading all terminals into the housing and verifying each terminal is fully seated (pull-test each wire): align the back cover with the housing rear face, ensuring the wire seals are correctly positioned in their cavities. Press the back cover firmly onto the housing until it clicks into the locked position. Verify the back cover is fully seated — a partially installed back cover will not compress the wire seals correctly and will not achieve IP67.

How do I identify the correct back cover for my connector?

The back cover part number (13719691) is specific to a particular connector housing. Cross-reference with the vehicle’s parts catalog or the connector housing’s part number to verify compatibility. Back covers are not interchangeable between different connector housings — even connectors with the same pin count may use different back cover designs.

Typical Applications

• Commercial trucks: Replacement back covers for damaged or missing connector rear seals
• Agricultural equipment: Connector assembly completion for harness repair
• Automotive workshops: Workshop stock for common connector back cover replacements
• Harness manufacturing: Back covers for new connector assemblies

Package Contents

1 piece — automotive connector back cover 13719691. Compatible connector housing not included.