NANO

628 ELECTRICAL DIAGNOSTIC INFORMATION & PROCEDURES BEFORE STARTINGENSURETHE BATTERYCONDITION CONDITION POSSIBLE CAUSE CORRECTION / REFERENCE ITEM 1) Warning lamp does not 1) If the bulb does not light ground the Warning lamp terminal of the appear when Ignition switch alternator is ‘ON’ 2) lf the bulb now lights the caused are: a) Jammed brushes or brush Free brushes, Replace if lead adrift. necessary. b) Dirty slip rings Clean the slip rings c) Rotor open circuit Check that the ends of the rotor winding are soldered properly to slip ring terminals. Re-solder the windings, if open or replace the rotor 3) lf the bulb does not light even after grounding Warning Lamp Terminal, the causes are a) Fused warning lamp bulb. Check for short circuit, if any in the wiring harness. After rectifying the short, replace bulb. b) Short circuited warning Replace Holder. lamp holder 4) If still WL does not appear Replace regulator when Ignition switch is on, the cause is faulty Regulator 2) Warning lamp glows dim 1) High resistance in warning Check and correct lamp 2) Regulator defect’s. Replace Regulator 3) Rotor defective Replace rotor. 3) Warning lamp on. Ammeter 1) Loose belt. Tighten the belt to the limits as shows no charge while indicated in routine maintenance engine is running. 2) Aux. diode leads ‘A’ open. Check diode connection and trace short. Rectify possible or replace rectifier assembly 3) Shorted rotor Replace rotor. 4) Stator open/shorted Replace stator assembly 4) Warning lamp ‘on’ or dim but 1) Faulty rectifier bridge Replace defective heat sink assy. ammeter shows charges (low output) 5) Warning lamp goes off 1) Faulty rectifier bridge Replace defective heat sink assy Ammeter shows low output 2) Stator winding short. Rectify or replace stator assembly 6) Warning lamp (Ammeter) 1) High resistance in the Check connections and ensure use of flickers considerably. Negative line recommended wire. 2) Slip ring dirty Clean the slip ring and recheck 7) Overcharging (battery gases) 1) Faulty regulator Replace regulator 2) Rotor shorted to earth on Rectify or replace rotor assembly negative side.