3054E Industrial Engine Glow Plugs - Test Caterpillar


Glow Plugs - Test
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1.1. Continuity Check of the Glow Plugs
2.1. Checking The Operation of The Glow Plug

Continuity Check of the Glow Plugs

Table 1
Required Tools 
Part Number  Part Name  Qty 
6V-7070  Digital Multimeter 

The following test will check the continuity of the glow plugs.

  1. Disconnect the power supply and the bus bar.

  2. Set the 6V-7070 Digital Multimeter to check continuity (resistance). Turn the audible signal on the digital multimeter ON.

  3. Place one probe on the connection for the glow plug and the other probe to a suitable ground. The Digital Multimeter should make an audible sound. Replace the glow plug if there is no continuity.

  4. Check the continuity on all the glow plugs.

Checking The Operation of The Glow Plug

Table 2
Required Tools 
Part Number  Part Name  Qty 
225-8266  Ammeter 
6V-7070  Digital Multimeter 

The following test will check the operation of the glow plugs.

  1. Disconnect the power supply and the bus bar.

  2. Connect the power supply to only one glow plug.

  3. Place the 225-8266 Ammeter on the power supply wire.

  4. Connect the 6V-7070 Digital Multimeter to the terminal on the glow plug and to a suitable ground.

  5. Turn the switch to the ON position in order to activate the glow plugs.

    Table 3
    12 Volt System 
    Amp  Time (sec) 
    30  Initial 
    21 
    14 
    10  20 
    60 

    Table 4
    24 Volt System 
    Amp  Time (sec) 
    12  Initial 
    8.5 
    20 
    60 

  6. Check the reading on all of the glow plugs.

  7. If there is no reading on the ammeter check the electrical connections. If the readings on the ammeter are low replace the glow plugs. If there is still no reading replace the glow plugs.

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