4600 scb blower issue

[Dewmyster]

Can anyone advise where the ground bus for the 3 blowers in the port stern is? My blowers are not working and I need to fix this.

If you have any other suggestions to get them on, I'm listening. Already checked the helm.

Thank you - Dewmyster

[shrew]

The 12v system uses a common ground. You have 3 blowers? That seems like overkill.

Are all three blowers not working? How did you determine this is a ground related issue?

I doubt there is a common ground bus bar. I would follow the ground back from each blower.

To troubleshoot further, gab a length of tinned wire, rig it with a clamp and connect it to the positive terminal of a batter. Run the wire back to the the blower. Now test the existing ground wire with the positive jumper using a volt meter.

If the circuit it good, it's not the ground. If the circuit is not good, it is likely the ground.

Sometimes it's easier to just run a new circuit.

[Dewmyster]

Thank you. Wll let you know how I make out.