Attention! When the switch is operating, a large amount of heat is released. In addition, the switch "mass" is connected through its radiator. Therefore, periodically clean the switch radiator from dust and dirt to improve heat transfer.
1. Disconnect the brown wire with the red stripe from the "K" terminal of the ignition coil (the wire goes to contact "1" of the switch).
2. Connect this wire to a 12-volt, 3-watt test lamp. Connect the other end of the lamp to the "K" terminal of the ignition coil. Crank the engine with the starter; the lamp should flash. If the lamp does not light, replace the switch.
This test method allows you to check whether the switch supplies control pulses to the ignition coil. A more accurate test (the duration and shape of the pulses) the switch must be produced on a special stand.
3. To replace the switch, disconnect the connector with wires from the ignition switch by pressing the spring clip on the connector with a screwdriver.
Before removing the switch, disconnect the wire from the "–" terminal of the battery.
4. Unscrew the two radiator mounting nuts and remove the switch with the radiator.
5. Install the new switch with the radiator in the reverse order of removal. Note: the ground wire should be secured under the left nut.