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Glow Plug Test D - Test Lamp Cycles Continuously

  1. Disconnect engine harness at control switch. Turn ignition on. Check voltage between control switch connector Pin No. 1 and ground. If voltage is at least 11 volts, turn ignition off and replace control switch. Repeat GLOW PLUG SYSTEM TROUBLE SHOOTING  and step 4 of GLOW PLUG TEST A  .
  2. If voltage is less than 11 volts, turn ignition off and replace engine harness. Repeat GLOW PLUG SYSTEM TROUBLE SHOOTING  and step 4 of GLOW PLUG TEST A  .