Mazda 323/626/929/GLC/MX-6/RX-7 1978-1989

Glow Plugs

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DIAGNOSIS & TESTING



Glow Plug Inspection
  1. Disconnect the wiring from the glow plug.
  2.  
  3. Using an ohmmeter, check the continuity between each glow plug terminal and the cylinder head.
  4.  
  5. If continuity does not exist, remove and replace the glow plug.
  6.  

Glow Plug Relay Inspection
  1. Unfasten the glow plug relay connector. Using a suitable jumper, attach the wire to the battery and the relay connector. Also, connect a suitable ohmmeter to the relay connector.
  2.  
  3. If the ohmmeter shows continuity when the battery is connected, the relay is good.
  4.  
  5. If the ohmmeter shows no continuity when the battery is connected, the relay is not good and should be replaced.
  6.  

REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable.
  2.  
  3. Remove the glow plug connector nut, lockwasher and flatwasher, then remove the glow plug connector wire from its terminal.
  4.  
  5. Using a suitable tool, remove the glow plug from the engine.
  6.  
  7. Installation is the reverse order of the removal procedure.
  8.  

 
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