1. Preheating relay
2. DDE control unit
Preheat relay circuit
Plug cover
The corresponding location of the plugs is located on the cover of the relay for the preheating system.
Removing
1. Remove the cover from the electronics module near the battery.
2. Press the holder latches with a screwdriver and remove the preheating relay.
3. Check the 80 A strip fuse near the connector, replace if defective.
4. Find the causes of overload in advance and eliminate them.
5. Unscrew the thick positive cable from the relay housing.
6. Connect the battery and check the voltage between terminal 15 and ground.
7. Turn on the ignition. The LED in the voltage monitor should light up, otherwise check the voltage transmission at the ignition switch.
8. If the LED lights up, check if the wiring to the glow plugs is burned out, replace if necessary.
9. Otherwise, replace the relay.
10. Install the control box cover.
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