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Home >> Cadillac >> 2017 >> CT6 Plug-In >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B147E or B147F: Battery Saver Relay Set/Reset Secondary Circuit (With Start/Stop) >> Component Testing >> Latching Relay Test
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Latching Relay Test

  1. Ignition OFF/Vehicle OFF, disconnect the appropriate KR104A Battery Saver Relay 1 or KR104B Battery Saver Relay 2.
  2. Test for 70-150 Ω between terminals 1 and 6.
    • If less than 70 or greater than 150 Ω 

      Replace the relay.

    • If between 70-150 Ω 
  3. Test for 70-150 Ω between terminals 2 and 6.
    • If less than 70 or greater than 150 Ω 

      Replace the relay.

    • If between 70-150 Ω 
  4. Test for infinite resistance between the terminals listed below:
    • 3 and 1
    • 3 and 2
    • 3 and 6
    • 5 and 1
    • 5 and 2
    • 5 and 6
    • If less than infinite resistance 

      Replace the relay.

    • If infinite resistance 
  5. Install a 3 A fused jumper wire between relay terminal 1 and 12 V. Install a jumper wire between relay terminal 6 and ground.
  6. Test for less than 5.0 Ω between terminals 3 and 5.
    • If 5.0 Ω or greater 

      Replace the relay.

    • If less than 5.0 Ω 
  7. Install a 3 A fused jumper wire between relay terminal 2 and 12 V. Install a jumper wire between relay terminal 6 and ground.
  8. Test infinite resistance between terminals 3 and 5.
    • If less than infinite resistance 

      Replace the relay.

    • If infinite resistance 
  9. All OK