Tesla Model 3 Owners & Service Manuals

Tesla Model 3: Harness - HV Battery to Rear Drive Unit (Remove and Replace)

Tesla Model 3 2017-2025 Service Manual / High Voltage System / HV Harnesses / Harness - HV Battery to Rear Drive Unit (Remove and Replace)

Harness - HV Battery to Rear Drive Unit - Remove

SPECIAL TOOLS

Lever Lock, HV Connector, Model 3 (1140311-00-A)

Remove

  1. Remove the rear subframe assembly. See Subframe Assembly - Rear (Remove and Install).

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Disconnect the electrical harness from the inverter low voltage connector.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Release the clip that attaches the low voltage electrical harness to the inverter.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Release the clip, disconnect the rear drive unit inlet hose from the inverter coolant inlet, and then plug the inlet.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Release the clip that attaches the rear drive unit inlet hose to the HV harness bracket, and then remove the hose from the rear drive unit.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Remove the bolt that attaches the HV harness bracket to the inverter.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Slide the release to unlock the HV harness connector.

  Harness - HV Battery to Rear Drive Unit - Remove

  1. Lift the handle on HV harness connector, disconnect the harness from the inverter connector, and then remove the harness from the rear drive unit.

Harness - HV Battery to Rear Drive Unit - Install

Install

  1. Fully raise the handle on the rear drive unit HV electrical harness.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Attach the HV connector lever lock onto the back of the HV electrical harness.
  2. Firmly connect the HV electrical harness to the inverter connector.

Caution: Make sure that the harness fits the connector squarely and tightly.

  1. While pressing the harness to the connector, remove the HV connector lever lock.

  Harness - HV Battery to Rear Drive Unit - Install

  1. While pressing the harness to the connector, fully lower the handle.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Slide the release to lock the HV electrical harness.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Install the bolt that attaches the HV harness bracket to the inverter. Torque 6 Nm

  Harness - HV Battery to Rear Drive Unit - Install

  1. Connect the rear drive unit inlet hose to the inverter coolant inlet, and then fasten the clip.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Fasten the clip that attaches the rear drive unit inlet hose to the HV harness bracket.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Connect the electrical harness to the inverter low voltage connector.

  Harness - HV Battery to Rear Drive Unit - Install

  1. Fasten the clip that attaches the low voltage electrical harness to the inverter.
  2. Install the rear subframe assembly. See Subframe Assembly - Rear (Remove and Install)

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