Help - 1989 2450 Bayliner

[Shanel]

I have had issues with the electrical system. Basically when the motor stops running at times I loose total power. I notice that when the motor is running the voltage bounces between 13 and 14 v. I just replaced both batteries and they are good. I checked the batteries when the power was goes out and I get 13.1 v ( right after I turn the motor off). Very frustrating. Help!

[Cheechako]

Check the ground cable connection (at the engine block?) Just one possibility....

[Shanel]

Looks good. I am getting the correct voltage at the block bolt. Is there a master fuse or breaker/reset somewhere in the engine compartment somewhere? Is there a timed automatic reset somewhere?

[Cheechako]

Is there a battery selector switch? It sounds like a loose connection somewhere, like the alternator is feeding everything while the motor runs instead of the battery...s Maybe a cable connection on the back of the switch panel...? or loose connection on the selector switch..?

[Shanel]

I think I need to go through every connection and wire starting at the battery. In order to kill all power, I agree there must be a faulty main line somewhere. Especially when the batteries are good. It sound painful to do but I think I must.

[Shanel]

There is a battery selection switch

[Shanel]

The alternator does feed everything while the motor is running doesn't it?

[Shanel]

Ok I think I found the issue. The main wire harness plug. When I wiggled the plug the power would turn off and on. I disconnected the male and female fitting to clean. Now I cannot get any power.

[GordMay]

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The specific information about your boat, including WIRING Diagrams, is in the Owner’s Manual Supplement. For specific information about your boat, download or view the Owner’s Manual Supplement
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[Cheechako]

sounds like you are zeroing in on it. maybe a loose wire in the back of one of those plug pins? is it corroded much? Worse comes to worse if it's in the right location you could use a terminal strip inplace of the plug. Are there like 8 wires on the plug? I had a similar problem with the connector on the back of a Perkins 4-108 once.

[Shanel]

Yep. The issue is Within the plug. Today the boat died again. I jiggled the plug and the power came back. I think I am going to terminal block the plug. Thanks for your help.

[Shanel]

Okay
Still a problem. Now the plug is fixed but still no power. I am getting power to the fuse box. I traced and confirmed that the ground and 12v is good to the box shown in the attachment. No power past that though. Other thing I noticed is that there is one particular fuse that when I plug it in the power to the box goes down to 2 v. However I do not know where it hoes to. I attempted to just leave it out and see what works. Still nothing, no lights, gauges, etc... Any ideas?