Low voltage on Bus power

[William52]

Magnum inverter shows fault and low voltage going down the road. NP/OK on shore power and Genny running, is there a relay that's open from the engine alternator? The gauge is showing 13 volts +. NP with truck batteries.

 

[Ex-Calif]

Dirty power connections somewhere from the alternator to the bus?

 

[John From Detroit]

Dirty power connections somewhere from the alternator to the bus?

I'm with Ex-Calif Dirty connections
Wire leads too small
Too many feet of wire
Note that one of the "Connections" is the isolator itself.

You an probe for voltage along the charge lines to find the weak spot.

 

[William52]

Hoping someone had a similar problem? with a Monaco coach...

 

[William52]

I'm with Ex-Calif Dirty connections
Wire leads too small
Too many feet of wire
Note that one of the "Connections" is the isolator itself.

You an probe for voltage along the charge lines to find the weak spot.

isolator? battery compartment?

 

[John From Detroit]

isolator? battery compartment?

The isolator is usually a solenoid device. looks a bit like a starter solenoid and works much the same way but where the starter is "Short term use only" (Hold it for like 10 minutes the coil burns up) the isolator is either magnetic latching or "Continuous duty" If the contacts are damaged you get a serious voltage drop through it.