The test is carried out on a cold engine (ambient temperature) and a fully charged battery (output voltage not less than 11.5 V), the glow plugs must remain in their original positions.
Checking the health of the power supply
1. Remove powertrain trim panels.
2. Using a suitable tool, type HAZET 4760-5, disconnect the wiring from the glow plugs.
3. Connect a probe lamp between the contact of the spark plug wire and ground.
4. Turn on the ignition, leave the ignition key in the pre-glow activation position and watch the lamp - it should light up, confirming the correct power supply to the candle.
5. Acting in a similar way, check the wiring of the remaining candles.
6. Disconnect the probe lamp and proceed to check the actual candles (see below).
Checking the condition of the glow plugs
1. By connecting an ohmmeter between the contact output of the candle and the body, make sure that there are no signs of a broken spiral - conductivity must take place (resistance is not equal to infinity), otherwise the spark plug must be replaced. Proceeding in a similar manner, check each of the candles.
2. Restore the original wiring and reinstall the powertrain trim panels.