how to diagnose Ford F-150 13th Generation (2015-2020) electrical problems?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and wire brush.
• Disconnect the negative battery terminal to ensure safety during diagnosis.

2. Battery Replacement (if necessary)

• Sub-steps:
  1. Remove the negative terminal first, then the positive terminal.
  2. Unscrew and remove the battery hold-down bracket.
  3. Lift the old battery out of the tray and place the new battery in.
  4. Reattach the battery hold-down bracket.
  5. Connect the positive terminal first, followed by the negative terminal.

3. Alternator Replacement (if necessary)

• Sub-steps:
  1. Disconnect the negative battery terminal.
  2. Remove the serpentine belt using a belt tensioner tool.
  3. Unplug the electrical connector from the alternator.
  4. Remove the mounting bolts securing the alternator.
  5. Install the new alternator and secure it with bolts.
  6. Reconnect the electrical connector and serpentine belt.
  7. Reconnect the negative battery terminal.

4. Fuse Replacement (if necessary)

• Sub-steps:
  1. Identify the blown fuse using the diagram on the fuse box cover.
  2. Use fuse puller or pliers to remove the blown fuse.
  3. Insert a new fuse of the same amperage rating.
  4. Close the fuse box cover.