How to Replace the Oil Sending Unit on a 2002 Ford 4.2L
- 1). Unplug the oil pressure switch.
- 2). Unscrew the switch from the block using the appropriate wrench. Discard the old switch.
- 3). Screw the new oil pressure switch into the block by hand as far as it will go. Tighten it firmly with the wrench, but do not over tighten it.
- 4). Plug in the oil pressure switch wiring harness connector. Start the vehicle to ensure proper operation.