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PEUGEOT Glow Plug System

Current to glow plugs flows through starter relay to Pre-Heat Control Box (located at center of firewall). A timer in control box provides power to glow plugs for 10-90 seconds, depending on ambient temperature. The following check can be made on this system:

  1. Check system ground between terminal 2 on control box and frame. Check condition of glow plug bulb and ground connection in instrument panel.
  2. To locate shorted glow plugs, remove connecting straps between plugs. Connect a heavy jumper wire between terminal 5 of control box and each plug, 1 at a time.
  3. Leave jumper wire connected for about 2 seconds. If glow plugs are bad, glow plug relay will cycle rapidly on and off. Replace shorted glow plugs.
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