Think ive stuffed something - now no accessories, and no cranking.

[davus]

Hi Guys,

So i think if stuffed up.

This morning i was in the boat, trying to troubleshoot a charging issue i have. I was checking the screws that go into the back of the 60 AMP fuse inline from the alternator, when i accidentally shorted the positive from the alternator, with the negative terminal on the merthacode. The engine was not running at the time.

How i have nothing. When i turn the key, i get no accessories. No dash beeps, and no cranking at all.

Everything that runs from the house batteries still works fine (fridges, lights etc).

Ive checked the main kill switch, ive checked the puch style 60 amp fuse just under the merthacode. Ive checked the battery still has full charge.

My next step it to start tracing things back, but hoping someone might be able to help out with a few ideas before i start pulling things apart.????

Im just hoping i havent fried something. Im terrified ive stuffed the PCM.

Im also not ever sure of what the merthacode does?. Is it possible this may be causing my issue?

Heres hoping nothing serious.

Many thanks

 

[Bt Doctur]

Dont know of any alt that has a fuse block mounted to it.Care to tell us what the alt is connected to and how old it is?

 

[Scott Danforth]

Main engine harness breaker would be my first thought

 

[StarTed]

While troubleshooting work from the power source out until you loose the power. That's easier said than done but that procedure works best.

 

[davus]

Morning all!,

I spent a bit of time yesterday yesterday with the multimeter tracing this from the start, and found the problem.

It turned out to be the 90 AMP starter fuse bolted to the side of the starter. Although the fuse itself had not blown, it was corroded and rusty, thus making hindering contact. Obviously by me mucking around with wires on the back of the motor, i upset it.

Ive ordered a new one, but in the meantime just removed and cleaned it, and all is now good.

Oddly enough, this also seems to have fixed my charging issue.!

Thanks for all the advice guys.

Dave