| 1. On cars "Toyotas 4 Runner/Hilux/Surf" 2 sound signals established on both parties from a radiator are provided. |
| 2. For check disconnect the socket and directly connect the battery to a signal. In the absence of a sound replace a signal. |
| 3. If the sound is, check tension on a conclusion when pressing the signal button. In the presence of tension check connection with weight. |
| 4. If tension is not present, check the relay. It is necessary to consider that relays of a sound signal generally have 4 or the 3rd conclusion (3-output relays have external connection with weight). |
| 5. If relays are serviceable, check tension on relay conclusions. If tension is not present, check wires from a safety lock to the relay. |
| 6. If on relay conclusions tension is, press the button of a signal and check a chain of connection with weight between the relay and the button. If break is not present, replace the signal button. |
| 7. If via the button the chain on weight becomes isolated, check existence in a chain from the relay for the button of break or short circuit. |