Measure tension on conclusions (except conclusions of G and H).

If tension differs from specified in the table, check the elements and the corresponding plaits of wires specified in the column "Checked Elements".

Disconnect a negative wire from the rechargeable battery.

Check the window regulator switch socket with the servo-driver for integrity of a chain between conclusions of G and H.

If the system does not work properly even on condition of serviceability of elements or corresponding plaits of wires, replace the switch of window regulators with the servo-driver.