Ml270 glow plug stay on even I changed the plugs and the relay

Tiny
TRANSAUTO
  • MEMBER
  • 2001 MERCEDES BENZ 270ML
  • 176,000 MILES
My ml270 glow plug light stay on, eventhough I changed all the plugs and the relay
Wednesday, January 5th, 2011 AT 5:15 AM

1 Reply

Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
You have to have a prob with the harness. Start at the relay with a schematic you will find you have power going to a circuit when no power is supposed to be there. This prob could be a faulty ignition switch sending power to the wrong circuits this is an electronic switch located on top side of your steering coloumn.
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Thursday, February 3rd, 2011 AT 2:05 PM

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