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Home >> Buick >> 2008 >> Lucerne Super >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.6L - DTC P0340 To DTC P2138 >> DTC P0412 or P0418 >> Component Testing >> Relay Test

Relay Test

  1. Test between the normally-closed switch terminals, if any, for 0 ohms.
  2. Test between the normally-open switch terminals for infinite ohms.
  3. Test between each switch terminal and either coil terminal for infinite ohms.
  4. Connect the relay coil terminals to ground and fused power to energize the relay.
  5. Test between the normally-closed switch terminals, if any, for infinite ohms.
  6. Test between the normally-open switch terminals for 0 ohms.
  7. Test between each switch terminal and either coil terminal for 0 volts.
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