No power at dashboard instrument cluster

[Beerock]

2015 scarab 255

Hello

No start/no crank/ no instrument cluster activity

Im getting 2 volts at the 10amp ignition fuse under the instrumdnt cluster with the keys in the on position. (12.5 v key off)

I jumpered battery voltage to that fuse (ignition 10a) and the dashboard lit up.

I found the same voltage on a few of the other under dash power wires as well (switches for bilge , blower , lights).

I jumpered in a good ground into the under dash circuit also with no change.

Work done already:
Swapped known fully charged good battery
Clean tight batt connections
All fuses and panel breakers good
Swapped the 4 relays around and bench tested them for click (just ordered 4 new ones also will arrive soon)

If anyone can assist or post a wiring diagram It would be greatly appreciated !

Thanks

 

[SPCAS]

I had a circuit breaker go bad and caused a very similar issue. Check voltage on both back terminals of the top left one.....you may find it’s looks good on the front but it’s not. Replaced mine last week actually

 

[Beerock]

Thanks for your input! I will look into it.

I had originally checked the voltage for all of them, but the circuits were not under load (key on).

I also remember seeing a little corrosion on one of them.

If you have a minute, Where did you get the parts and how much was it? Im new to the boat world (was an auto mechanic before).

 

[SPCAS]

Amazon. it was less than $10 for a replacement breaker. Circuits don't have to be on but you should have 12v on both sides of breaker. Mine would drop out with a small wiggle. sometimes when I would go to start it there would be nothing. Takes about 10m to fully replace it. Not a hard project at all.