Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Diode test lamp V.A.G 1527
• ◆ Adapter set V.A.G 1594
• ◆ Jointed spanner (key) 3220

Test prerequisites:

• ● Battery voltage at least 11.5 V
• ● Ignition switched off

Test sequence

• ‒ Pull glow plug connector off glow plug.

• ‒ → Connect diode test lamp wire using auxiliary clips from auxiliary cable set to battery positive (+).
• ‒ Place diode test lamp probe on each glow plug one after the other.
       Diode lights up: glow plug OK.
       Diode does not light up: replace glow plug.
• ‒ Remove and install glow plugs with jointed spanner 3220
       Tightening torque: 15 Nm.