Engine alarm problem.
 

I have a 99 Heat, with a 502 MPI. The boat has the memory gauges with the Nordic symbol on them. The water temperature gauge did not work, so I replaced the sender and gauge with a Liverosi. I wired the guage per Nordic, the power came form the purple wire on the ignition, grounded to the fuse panel, ran a new wire back to the sender, and jumped the light from the nav light switch (green wire). The engine alarm keeps going off. The trim resevoir is full, oil pressure in good and water temp is 150-160. I tired unplugging the wires for the trim resevoir, water temp sensor and the oil pressure sender, with no luck still making the god awful noise. I noticed that the alarm had a piece of paper towel duct taped to it to quite it down I am stumped and actually pissed. I think the previous owner had the problem and jerry rigged it to quite it down. I just bougth the boat a couple weeks ago and it is already giving me fits. Anyone have any ideas???????

Thanks

Re: Engine alarm problem.
 

I think you have some of the wires wrong. Here's a break down of what wires do what. Hope it helps...

Standard Boat Wiring color Codes.


Blk -Grounds-General
Blk/Brn -Pump Grounds
Blk/Red -Voltmeter Grounds
Blk/Org -Isolated Accessory Grounds
Blk/Yel -ignition stop
Blk/Grn -Water Level Sender Ground
Blk/Blu -Lighting Grounds
Blk/Gry -Nav Light Grounds
Blk/Wht -Battery Parallel Solenoid
Brown -Pumps-General, Bilge or Sump (Manually Switched)(Also alternator starter to Ign.)
Brn/Red -Pumps, Bilge or Sump
Brn/Org -Power feed to Auto Bilge Switches-Pumps, Fuel/Oil Tranfer or Priming
Brn/Yel -Baitwell or Aerator
Brn/Grn -Fresh Water Pump/Water Maker
Brn/Blu -Head Pump
Brn/Vio -Washdown Pump
Brn/Wht -trim pos sender
Red - Battery Feeds Unprotected
Red/Vio -Misc. Accy. Main Feed Protected (fused) from batt to trim panel.
Pink -Fuel Sender
Org/Blk -Audio System Feed
Org/Brn -Electric Head-Sanitation System
Org/Red -Wiper Port
Orange -Accessories common feed- Dist Panel to Acc switch-Anode Electrode-Mercathode
Org/Yel -Diesel Pre-heat
Org/Grn -Wiper Stbd
Org/Blu -Communications Equipment
Org/Vio -Navigation Equipment
Org/Wht -Wiper Center
Yel/Blk -Choke - Neutral saftey trans mounted
Yel/Red -Start Solenoid(starting circut), Neutral Safety
Yel/Org -Powered Ventilation, Fans
Yellow -Bilge Blowers -(also alternator DC output)
Yel/Wht -Rudder Angle Sender
Grn/Red -Stop Solenoid/Kill Switch
Grn/Yel -AC Grounding
Green -Bonding
Grn/Wht -Engine Trim in and or tilt down
Grn/Org -Engine Independent Trim down
Blu/Blk -Cabin Lights
Blu/Brn -Oil Temp Send
Blu/Red -Cabin or Cockpit Lights Port
Blu/Org -Engine Independent Tilt Up
Blu/Yel -Lighting Circuits to Remote Send
Blu/Grn -Cabin or Cockpit Lights Stbd
Blu -Instrument & General Lighting
Blu/Vio -Courtesy, Boarding Lighting
Blu/Wht -Engine Trim Outand/or Tilt Up
Light Blue -Oil Pressure
Vio/Red -Eng. or Generator B+ from Breaker
Vio/Yel -I/O Trim Up (ballast bypass)
Vio/Grn -I/O Trim Down
Vio -12v Ignition-Generator or Engine
Vio/Wht -Trim "Trailer" switch
Gry/Blk -Mast Light
Gry/Red -Spotlight Remote
Gry/Org -Docking Lights
Gry/Grn -Strobe or Beacon
Gry/Blu -Spreader/Flood Lights
Gry/Vio -Windlass/Winch
Gray -Navigation (running) Lights, Tach. Send
Gry/Wht -Anchor Light
Wht/Brn -Temp. Alarm or Indicator
Wht/Red -Fuel Alarm or Indicator -((Ignition module to Dist.)Mercury Thunderbolt Ignition)
Wht/Org -Fire Alarm or Indicator
Wht/Yel -Air Flow Alarm or Indicator
Wht/Grn -Water Press/Flow Alarm or Indicator - ((Ignition module to Dist.)Mercury Thunderbolt Ignition)
Wht/Blu -Oil Press Alarm or Indicator
Wht/Vio -Voltage Alarm or Indicator
White -General Alarm Usage, Yamaha Kill Switch
Tan - Water Temp sender
Tan/Blu -Warning system sense wire (Audio warning)
Pink -Fuel sender

Re: Engine alarm problem.
 

Thanks,

Nordic uses a standard Merc harness and somewhere between the engine and the dash they have their own creative wiring for all the gauges and the other goodies. The wiring I choose was what the factory recommended that I do. I don't know why they didn't use standard Merc wiring for everything????

Re: Engine alarm problem.
 

Ttt

Re: Engine alarm problem.
 

The gauge should not have anything to do with the alarm. The gauge sending unit is seperate from the ect sensor. Do a search, I remember someone talking about making a tool to ck for faults in the ecm. Dwight

Re: Engine alarm problem.
 

Thanks Dwight, hope to see you at Hardy soon.