'89 SN 2001 Electrical Issue

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Long time reader, first time poster.

When I put a load on the electrical system, such as starting the boat with the blower on, the main circuit breaker aft of the engine will sometimes pop. The engine will still be running, but i can tell it has popped because the needle on the tach will jump around erratically. The boat has actually been doing this for quite some time, I have been to lazy to address the problem. Also, whenever I turn the nav lights on, the gauges will go nutty - they will show low oil pressure, high water temp, etc.

Is it a bad voltage regulator or what???

Thanks in advance. 

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turbojet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: April-13-2018 Location: Atlanta Status: Offline Points: 2	Post Options Post Reply Quote turbojet Report Post Thanks(0) Quote Reply Topic: '89 SN 2001 Electrical Issue Posted: April-13-2018 at 9:32pm
	Long time reader, first time poster. When I put a load on the electrical system, such as starting the boat with the blower on, the main circuit breaker aft of the engine will sometimes pop. The engine will still be running, but i can tell it has popped because the needle on the tach will jump around erratically. The boat has actually been doing this for quite some time, I have been to lazy to address the problem. Also, whenever I turn the nav lights on, the gauges will go nutty - they will show low oil pressure, high water temp, etc. Is it a bad voltage regulator or what??? Thanks in advance.

SNobsessed Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102	Post Options Post Reply Quote SNobsessed Report Post Thanks(0) Quote Reply Posted: April-13-2018 at 10:18pm
	Check all connections to make sure they are tight & clean. Are the wires showing any corrosion? The clue is that is acts up under heavy load. Could be bad breaker too. I suggest you check voltages at each terminal point when it is showing symptoms. That should help find cause.
	“Beer is proof that God loves us and wants us to be happy.” Ben Franklin

Morfoot Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5320	Post Options Post Reply Quote Morfoot Report Post Thanks(0) Quote Reply Posted: April-14-2018 at 9:57am
	Tim, +1 on what Chris said and as far as the gauges bouncing around and showing lower readings when you turn the lights on....thats normal. Most 80's SN's have this same phenomenon. The ground wires to the gauges are all daisy chained together. Some guys have rewired the dash so that each gauge has a dedicated ground. That fixes the erratic needle jumping,
	"Morfoot; He can ski. He can wakeboard.He can cook chicken.He can create his own self-named beverage, & can also apparently fly. A man of many talents."72 Mustang "Kermit",88 SN Miss Scarlett, 99 SN "Sherman"

desertskier Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: December-19-2006 Location: Az Status: Offline Points: 1115	Post Options Post Reply Quote desertskier Report Post Thanks(0) Quote Reply Posted: April-14-2018 at 8:44pm
	Like the others said, the gauge problem is typically bad dash connections. I just completely rewired my dash to eliminate those problems. I had added additional power and ground wires in the past and that helped a lot but over time the crimp connections get corroded. I added buss bars for ground, key switched power and ignition breaker power and ran a single wire to each connection point to eliminate the daisy chains (although I left the chain for the gauge lights, just replaced all the connectors). Also added a new 12V lighter socket and a dual USB charging port. Probably overkill on the wiring job but it should be good for another 25 years. bri892001's ultimate dash rewire thread

'89 SN 2001 Electrical Issue

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