Test sequence

• Disconnect glow plug connectors from glow plugs.
• Connect voltage test lamp wire to B+ using adapter clips from connector test kit.
• Attach test lead of voltage test lamp to each glow plug in succession.
  Fig 1: Attaching Test Lead Of Voltage Test Lamp To Each Glow Plug

  Courtesy of VOLKSWAGEN OF AMERICA, INC.

LED lights up: Glow plug OK.

LED does not light up: Replace glow plug

• Remove and install glow plugs using 3220 flex wrench

  Tightening torque: 15 Nm.