- Battery is defective.
- There is a poor connection between the switch, traction relay, battery and starter, resulting in the battery not supplying the required current to the starter.
- The traction relay is defective.
- Mechanical or electrical defect of the starter.
2. To check the battery, turn on the headlights. If they dim after a few seconds, the battery is discharged. If the headlights are bright, turn the ignition key to the start position and watch the lights. If they become dim, it means that the current is reaching the starter, so the fault may be in the starter. If the lights continue to burn brightly (and the traction relay cannot be heard operating), there may be a fault in the circuit or traction relay - see the following points. If the starter turns slowly and the battery is fine, this indicates a defective starter or significant resistance somewhere in its circuit.
3. If a fault is suspected in the circuit, disconnect the wiring from the battery (including those connected to the body), starter/solenoid wiring and engine/transmission ground strap. Clean the connections thoroughly and reconnect the wiring, then use a voltmeter or test lamp to ensure that battery voltage is present at the power terminal of the traction relay and that the ground is OK. Apply Vaseline to the battery terminals to prevent corrosion, which is the most common cause of electrical system failure.
4. If the battery and all connections are OK, check the circuit by disconnecting the wire from the traction relay terminal. Connect a voltmeter or test light to the disconnected wire and a good ground (for example, to the negative terminal of the battery), when you turn the key in the ignition switch to the "start" position, the battery voltage should be registered on the wire. If so, the circuit is OK, if not, check the circuit wiring as described in Section 12.
(This article is taken from the website: www.Renaultbook.ru)
5. The traction relay contacts can be checked by connecting a voltmeter or test lamp to the starter supply terminal on the traction relay and ground. When you turn the ignition key to the "start" position, battery voltage should be registered. If this is not the case, the traction relay is defective and must be replaced.
6. If the circuit and traction relay are in order, then the starter is faulty. In this case, contact a specialist, but first estimate the cost of spare parts.