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Home/Chevrolet/Silverado 3500 HD/Chevrolet Silverado 3500 HD (2007-2012)/Repair manual/Seats/B2425 0A, B2425 0B, B2425 0C, B2425 0D, B2425 0E, B2425 04,…
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B2425 0A, B2425 0B, B2425 0C, B2425 0D, B2425 0E, B2425 04, or B2425 1F Chevrolet Silverado 3500 HD

Seats ~328 words
  1. Ignition OFF, disconnect the X3 harness connector at the MSM.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the X3 harness connector at the MSM and disconnect the X1 harness connector at the MSM.
  4. Test for 2.0-8.0 ohms between control circuit terminal 14 and control circuit terminal 11. If greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal replace the seat cushion heater element. If less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the seat cushion heater element.
  5. Disconnect the X2, X5 harness connectors at the MSM.
  6. Test for 850-300K ohms between the signal circuit terminal 1 X5 and the low reference circuit terminal 3 X2. If greater than the specified range, test the signal and low reference circuits for a short to voltage or an open/high resistance. If the circuits test normal, replace the seat cushion heater element/temperature sensor. If less than the specified range, test for a short between the signal and low reference circuits. If the circuits test normal, replace the seat cushion heater element/temperature sensor.
  7. Connect the X1, X2, X5 harness connectors at the MSM.
  8. Disconnect the harness connector at the seat cushion heater element/temperature sensor.
  9. Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal C and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the MSM. If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.
  10. If all circuits test normal, replace the MSM.

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