1. Uncover, having released latches or having unscrewed screws.

2. Check a condition of a cover (existence of cracks, breakdown traces, etc.).

3. Remove the runner (on a part of cars the runner fastens the screw) and examine.

Replace the worn-out runner (contacts are forbidden to be smoothed out).

4. Check a condition of high-voltage wires, if necessary replace, removing and establishing each wire separately.

5. Establish all details upside-down.