Correcting a Customer Complaint of Noise or Vibration Coming from the Vacuum Pump
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SERVICE INFORMATION
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Bulletin Nbr:
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541-9030
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Date:
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JULY 1996
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Market:
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US
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Correcting a Customer Complaint of Noise or Vibration Coming from the Vacuum Pump
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This bulletin contains information about a resistor harness that can be installed to address a customer complaint of vacuum pump noise or vibration following the installation of vacuum pump kit, P/N 47 78 411 (see SI 541-9029). The resistor harness lowers the operating voltage of the pump, which lowers objectionable noise. Normally, the vacuum pump only runs for 1-2 seconds and most customers would not find this brief operation objectionable.
1994 900 models with 2.5 liter V6 engine with automatic transmission and without air pump
1994-900 models with 2.3 liter 4-cylinder engine with automatic transmission and with air pump
1995- 900 models with 2.5 liter V6 engine with automatic transmission and with air pump
Resistor wiring harness: 48 06 428
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1.
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Unplug the vacuum pump adapter harness at the vacuum pump.
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2.
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Plug one end of the resistor harness, P/N 48 06 428, into the connection at the vacuum pump.
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3.
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Plug the other end of the resistor wiring harness to the vacuum pump adapter harness.
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4.
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Reconnect the negative battery cable.
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