Western Star Bodybuilder Book: Revision 3.2a 1A Fuse and Relay Blocks P. 1A-25 b Fuse / Relay Panels T.o.C. The 4700 ENH models are equipped with three Power Distribution Modules (PDM): PDM 1, PDM 2, and PDM 3. The PDMs provide fuses and relays, which include: Ÿ Ultra Micro Relay: (23-13893-000) Ÿ J-Case Fuse: (23-13969-0XX) * Ÿ High Current Micro Relay: (23-13124-000) Ÿ Mini Fuse: (23-12537-0XX) * Ÿ Mini ISO Relay 4-Pin: (23-11276-020) Ÿ Circuit Breaker Type 1: (23-13125-2XX) * Ÿ Mini ISO Relay 5-Pin: (23-11276-011) Ÿ Circuit Breaker Type 2: (23-13126-2XX) * Ÿ Bi-Stable Relay:
(06-71082-000) (Located on the back of the PDMs) * Part numbers ending with -#XX are defined by the amperage rating. Reference service manual when replacing or adding these parts. PDM Features Ÿ PCB based - dedicated printed circuit boards that electrically connect components using conductive traces. Boards are securely housed in special housings. Ÿ Connector based interface with hardwired connectors. Allows ease of plugging-in/out for servicing. Ÿ Low Voltage Disconnect (LVD) module integrated in PDM 1, controls features in all three PDMs. Ÿ PDMs clipped on corresponding mounting brackets, allowing the PDMs to snap in and out for removal.
PDM 1 and PDM 2 have fabric handles for easy removal. PDM 3 is mounted on a rotating bracket, providing access for servicing and customer additions (See section 1A-26). Ÿ Dedicated labels for each PDM, located behind the dash covers. Labels include positioning and descriptions for the fuses and relays. Models: 4700 ENH Models: 4700 ENH