Danger
Potentially Dangerous
Injury may result if this procedure is not followed properly. Use caution and follow all warnings.
Danger

Introduction

We will demonstrate how to remove the radio suppression capacitor in a 2007 Ford Focus and replace it with a new capacitor by using a ratcheting screwdriver and 8mm nut driver attachment.

The radio suppression capacitor acts as a noise barrier as it dampens engine noise in the cabin of the vehicle. However, sometimes the wire in the capacitor corrodes and fails to dampen noise from the engine. Additionally, the wire may come loose, blowing fuses or even the battery.

Pop the hood of the 2007 Ford Focus using the pull lever under the steering wheel. Secure the hood with the hood prop on the left side of the engine. Secure the hood with the hood prop on the left side of the engine.
  • Pop the hood of the 2007 Ford Focus using the pull lever under the steering wheel.

  • Secure the hood with the hood prop on the left side of the engine.

To disconnect the battery follow steps 2-4. Loosen the bracket with the wrench. Remove the top cover.
  • To disconnect the battery follow steps 2-4.

    • Loosen the bracket with the wrench.

    • Remove the top cover.

You should wear protective gloves and goggles/glasses when working with the battery. Remove the negative cable (usually black in color and labeled - or "Negative" ) by turning the nut clockwise with the wrench. Set the ground cables away from the battery to avoid electrocution.
  • You should wear protective gloves and goggles/glasses when working with the battery.

  • Remove the negative cable (usually black in color and labeled - or "Negative" ) by turning the nut clockwise with the wrench.

  • Set the ground cables away from the battery to avoid electrocution.

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Remove the positive cable (usually red in color and labeled with + or "Positive")by turning the nut clockwise with the wrench. Remove the positive cable (usually red in color and labeled with + or "Positive")by turning the nut clockwise with the wrench.
  • Remove the positive cable (usually red in color and labeled with + or "Positive")by turning the nut clockwise with the wrench.

Unscrew the first anchor bolt that attaches the metal clip to the engine mount. Replace the anchor bolt if corroded.
  • Unscrew the first anchor bolt that attaches the metal clip to the engine mount.

  • Replace the anchor bolt if corroded.

Unscrew the second anchor bolt that secures  the metal mount. Unscrew the second anchor bolt that secures  the metal mount.
  • Unscrew the second anchor bolt that secures the metal mount.

Detach the wiring harness by holding down the tab on the top of the clip. Pull apart. Pull apart.
  • Detach the wiring harness by holding down the tab on the top of the clip.

  • Pull apart.

Obtain the new capacitor and reattach it by reversing the same steps you followed to disconnect the old capacitor.
  • Obtain the new capacitor and reattach it by reversing the same steps you followed to disconnect the old capacitor.

Conclusion

Install the new capacitor by following the steps above in reverse order.

Amin Sadessi

Member since: 04/28/2017

111 Reputation

1 Guide authored

Team

UC Davis, Team S1-G6, Coad Spring 2017 Member of UC Davis, Team S1-G6, Coad Spring 2017

UCD-COAD-S17S1G6

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1 Guide authored

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