Trailer ABS Compatibility

ep4 dm 11.07.002

The ZF ABS is designed to communicate with a trailer ABS, if they are compatible. Compatibility results in the brief illumination of the trailer ABS telltale, shown in Fig. during vehicle start-up and fault detection.

Fig. 1, Trailer ABS Telltale

The telltale operates as follows when a compatible trailer is properly connected to the tractor:

  • When the ignition key is turned to the on position, the trailer ABS telltale lamp illuminates momentarily, then deactivates.

  • If the telltale illuminates momentarily during vehicle operation, then shuts off, a fault was detected and corrected.

  • If the telltale illuminates and stays on during vehicle operation, there is a fault with the trailer ABS. Repair the trailer ABS system immediately to ensure full antilock braking capability.

The trailer ABS telltale will not illuminate if an incompatible trailer is connected to the tractor.

Note:
Parent topic: ZF™ Antilock Braking System
Document Number: 0000087331
Manual Publication Date: 2024-03-21
Topic Publication Date: 2025-02-13