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Wiring Harness
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TM-5-4210-220-12 Truck Firefighting: Powered Pumper: Foam and Water 500-GPM Capacity; Centrifugal Pump Power Takeoff Driven Manual
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REPAIR - TM-5-4210-220-12_549
TM 5-4210-220-12 4-24.  ELECTRICAL SYSTEM - Continued (4) To test the wire, either use an ohmmeter connected between the two ends of the wire or connect one end to a known 12 Vdc source and test the other end with a voltmeter. (5) If  one  wire  is  not  conducting  in  a  harness.    lay  a  new  wire  the  same  size  as  the  one  that  has  failed, alongside the harness.  Follow the same route as the harness.  Tape the new wire to the harness at least every 12 in. (30 cm). (6) Remove the number sleeves from the end of the old wire and insert on new wire, or number new wire with new sleeves. (7) Attach the same terminals to the new wire as are on the old wire. (8) Connect new wire to the terminals and check circuit functions correctly. (9) Cut failed wire ends out of harness so the wire cannot be reused. REPLACEMENT (1) If harness has suffered severe damage due to road obstruction or other such accidents and more then 4 or 5 wires are cut through, the whole harness should be replaced. (2) Refer to illustration for harness routes and location of plug and sockets. (3) Tag and disconnect all terminals  from which harness is removed to aid replacement; all new harnesses are numbered the same as the old one and should be connected identically. (4) Be sure that when new harness is installed, all holes through bulkheads are protected with suitable rubber grommets. (5) Be sure harness is installed with similar supports as old harness. (6) Be sure that no part of the harness is closer than 1 in. to moving or hot surfaces. REPAIR a. Harness Repair (1) Badly damaged harnesses should not be repaired except in emergencies.  Use butt connectors to join cut wire ends together (2) A harness must be replaced if more than 5 wires are cut through. 4-424

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