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| Connect the cable from the voltage tester -VAG 1527B- to the (+) positive battery terminal using the pincers from the auxiliary measurement set -VAG 1594C- . |
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| Apply the testing point of the voltage tester -VAG 1527B- to each glow plug, one by one. |
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| Diode lights up: Glow plug okay |
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| Diode does not light up: Replace glow plug |
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| Remove and install the glow plugs using articulated wrench, -3220-, tightening torque: 15 Nm. |
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