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Charge Indicator Light Never On

NOTE: On ambulance equipped with dual generators, disconnect both generators.
  1. Disconnect generator connector. Turn ignition on. Connect fused jumper wire between harness connector terminal "B" (100-amp and dual generators) or terminal "L" (124-amp generator) and ground. If charge indicator light illuminates, go to next step. If charge indicator light does not illuminate, go to step 3).
  2. Check generator ground (through case). Clean if needed. If ground is okay, replace generator(s). See GENERATOR  under REMOVAL & INSTALLATION. Recheck system.
  3. Disconnect instrument panel connector. Using self-powered test light, connect between harness connector terminal "B" (100-amp generator and dual generators) or "L" (124-amp generator) and ground. If test light illuminates, go to next step. If test light does not illuminate, go to step 5).
  4. Check charge indicator light bulb. Replace if needed. If bulb is okay, replace instrument cluster. See INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Recheck system.
  5. Repair open in Brown wire between instrument panel and generator. See WIRING DIAGRAMS  . Recheck system.
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