Northern Lights M1166AMCA troubleshooting: 12 fault codes and symptom-cause-remedy entries from the manufacturer's own service documentation.
Northern Lights M1166AMCA — full specs, parts & maintenance.
| Symptom | Cause | Remedy |
|---|---|---|
| Entire Electrical System Does Not Function | Loose or corroded connections, Faulty connection, Sulfated or worn out batteries | Clean and tighten loose connections, Clean and tighten battery and harness plug connections, Check specific gravity and electrolyte level of each battery cell |
| Engine Hard to Start or Will Not Start | Engine starting under load, Improper starting procedure, No fuel, Low battery output, Excessive resistance in starting circuit, Crankcase oil too heavy, Improper type of fuel, Water, dirt or air in fuel system, Clogged primary fuel filter element, Clogged secondary fuel filter element, Dirty or faulty injection nozzles, Electronic Fuel System problem (if equipped), Injection pump not getting fuel or air in fuel system | See starting section of this manual, Take special note of Bypass Switch operation, Check level of fuel in fuel tank, Check electrolyte level and condition, Clean and tighten all battery connections, Use oil of proper viscosity, Consult fuel supplier and use proper type of fuel for operating condition, Drain, flush, fill and bleed system, Clean or replace filter element, Replace filter element, Have your dealer check injection nozzles, See your dealer, Check fuel flow at supply pump or bleed fuel system |
| Battery Will Not Charge | Loose or corroded connections, Sulfated or worn out batteries, Loose or defective alternator belt | Clean and tighten battery connections, Check specific gravity of each battery cell, Check electrolyte level of each battery cell, Adjust belt tension, Replace belt |
| Undercharged Electrical System | Excessive electrical load from added accessories, Engine idling excessively, Poor electrical connections on battery, ground strap, starter, or alternator, Defective battery, Battery charging rate too high | Take off accessories or install higher output alternator, Increase the engine RPM when there is a heavy electrical load, Inspect connections and clean if necessary, Test battery, Test charging system |
| Starter Inoperative | Check DC circuit breaker, Faulty start circuit relay, Blown main system fuse, Loose or corroded connections, Low battery output, Defective electrical system ground wire | If the breaker is tripped, reset it, See dealer, Replace fuse, Clean and tighten loose battery and harness plug connection, Check specific gravity of each battery cell, Check electrolyte level of each battery cell, Repair or replace |
| Starter Cranks Slowly | Low battery output, Battery is too small, Battery cables are too small, Check specific gravity of each battery cell, Check electrolyte level of each battery cell, Crankcase oil too heavy | Battery is too small, Battery cables are too small, Replace battery if necessary, If low, fill cells with distilled water, Fill with oil of appropriate viscosity |
| Engine Overheats | Engine overloaded, Low coolant level, Stretched belt or defective belt tensioner, Low engine oil level, Incorrect grade of fuel, Cooling system needs flushing, Defective thermostat, Defective temperature gauge | Reduce the load, Fill tank or radiator to proper level, Check hoses for loose connections and leaks, Check automatic belt tensioner and check belts for stretching. Replace as required, Check oil level, add oil as needed, Use correct grade of fuel, Flush cooling system, Remove and check thermostat, Check water temperature with thermometer and replace gauge if necessary |
| Engine Knocks | Low oil level, Injection pump out of time, Below normal engine temperature, Engine overheating | Add oil to engine crankcase, Call your dealer, Check your thermostats, Check water temperature to see if temperature gauge is working properly, See “Engine Overheating” section |
| Temperature above 220°F (104°C) | Shut off the engine immediately and use the Trouble Shooting Guide on pages 22 - 24 to isolate the cause of the overheat. | |
| Low oil level | Check the engine crankcase oil level. If the oil level is low, fill with recommended lubricating oil and restart. Watch the oil pressure gauge carefully and shut off the engine if it does not show a normal reading after a few seconds of operation. | |
| Oil pressure does not show a normal reading | Watch the oil pressure gauge carefully and shut off the engine if it does not show a normal reading after a few seconds of operation. Do not restart the engine. | |
| Temperature above 220°F (104°C) after shutdown system is activated but temperature gauge shows within normal range | Check the engine crankcase oil level. If the oil level is low, fill with recommended lubricating oil and restart. Watch the oil pressure gauge carefully and shut off the engine if it does not show a normal reading after a few seconds of operation. If the oil level was normal, do not restart the engine. Call your Northern Lights or Lugger dealer for assistance. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Documented causes: Loose or corroded connections, Faulty connection, Sulfated or worn out batteries. See the table for the matching fixes.
Documented causes: Engine starting under load, Improper starting procedure, No fuel, Low battery output, Excessive resistance in starting circuit, Crankcase oil too heavy, Improper type of fuel, Water, dirt or air in fuel system, Clogged primary fuel filter element, Clogged secondary fuel filter element, Dirty or faulty injection nozzles, Electronic Fuel System problem (if equipped), Injection pump not getting fuel or air in fuel system. See the table for the matching fixes.
Documented causes: Loose or corroded connections, Sulfated or worn out batteries, Loose or defective alternator belt. See the table for the matching fixes.