Jabsco Lite Flush 58500-0012 12V wiring diagram

58500-0012 is the 12 V Lite Flush with a foot switch. The first press introduces rinse water; the second completes the flush sequence and leaves the bowl dry. The separate 58500-1012 version uses a control panel. This entry describes the complete toilet assembly and raw-water rinse pump, rather than a bare 240 W motor.

The manual's 12 V wiring table gives 20 A draw and a 25 A fuse. Feed the control box through an accessible isolating switch, with red positive and black negative. Size conductors using the full battery-to-toilet-and-return length in that table. The catalog terminals represent that incoming supply, with protection-based planning limits.

Keep the factory harness relationships intact: rinse-pump outputs, flush motor and foot-switch connectors are not interchangeable battery feeds. The control-panel socket is not the foot-switch socket. Do not bypass the control sequence by supplying a motor directly, and do not increase the fuse to cure a jammed pump.

The rinse pump is for raw water; this manual does not authorize connecting the assembly directly to pressurized fresh water. Use the specified inlet and discharge sizes and accessible seacocks. Follow the appropriate drawing for the rim's position relative to the waterline at every expected heel and trim angle.

Where required, the inlet-side vented loop belongs between the rinse pump and the bowl, not in the pump's suction line. A misplaced loop can stop priming while leaving the flooding risk unresolved. Secure hoses and supports, retain access to the pump, and check the particular outlet path to a holding tank or other permitted system. A two-wire electrical example cannot certify the toilet's plumbing.

Open the necessary seacocks for operation. Fill the bowl before use and confirm both stages of the foot-switch sequence, observing inlet flow, evacuation and leaks. Close the inlet and outlet seacocks after use and when the vessel is unattended, as the manual directs. Isolate electricity and close seacocks before opening the assembly; keep fingers clear of the pump impeller.

A weak rinse calls for checking the intake, seacock, air leaks and pump supply. A motor that runs but cannot evacuate calls for inspection of the discharge path and pump. Use compatible cleaners and winterizing procedures from the manual; aggressive solvents or abrasive cleaning can damage toilet parts.

Lite Flush manual: PDF pp. 2–6 identify 58500-0012 and explain operation, vented loops, the 20 A/25 A wiring table and control-box connections; pp. 7–9 cover servicing and faults. The marine ledger records the downloaded original.