Testing Generator Output on a 2008 Gulfstream Tourmaster

[Joe Picarello]

How do you test to see if your generator is putting out the correct voltage/ amperage?

 

[Skohlman]

I assume that this is connected to your RV if so do you feel something is wrong?

Got a meter to measure voltage via outlets and or frequency?

Steve

 

[Joe Picarello]

I assume that this is connected to your RV if so do you feel something is wrong?

Got a meter to measure voltage via outlets and or frequency?

Steve

YES 8K Gen in a 2008 Gulfstream tourmaster 40T. Also are there breakers underneath the motorhome for the generator, if so where? i have done a lot of crawling but not finding them. Help please

 

[Skohlman]

I have a 2007 Tour Master T40A so maybe different but I have a breaker like talking but mine is on the generator itself. I don’t think they put a breaker under the RV since it could get wet and give you problems. There’s electrical boxes under the bed. Like transfer switch but what you asked I would use a meter and see voltage and or frequency.

 

[riverofcode]

In my rig the generator has a small box on top of it where all the wires exit/enter. Inside is the dual breakers you can measure off of. The box has the CAT sticker on it. Worse case is you can find your transfer switch and measure across the generator input side of it. My transfer switch is under the bed.

edit: attached pics

 

[Joe Picarello]

I have looked for the transfer switch multiple times with no success and checked the breakers on the generator. I have read the transfer switch in mine was in the inverter so I replaced it. Still no ac when disconnected from shore power, when it use to work.

 

[riverofcode]

If yours is built like mine there will be 3 sets of batteries.

• 2 Chassis 12v group 31's. compartment near the rear wheels on the curb side.
• 2 House 12v - located next to the chassis ones, group 27's
• 4 Inverter/Generator start - 6v series/parallel wired up in front of the generator in the nose

The inverter is located in the forward bay, road side under the driver. It does have a built in transfer switch but only services the items that the inverter powers when off grid/off generator.
The main transfer switch that handles shore power -vs- generator power is under the bed that lifts up. Next to mine is the charger for the house batteries. You might need to follow your heavy wire thru the floor from the shore power ingress. Relatively small metal box with 3 wires thru it. 1 for shore input, 1 for generator input and 1 output to your breaker panel. Generator input will always "win" if its running and putting out power regardless if you are connected to live shore power.

The transfer switch is the larger box in these pics. The other is the house battery charger.

 

[Joe Picarello]

I have been under the bed, under the generator, under the fridge, behind the breaker panel, under the rear of the unit and have attempted following the harness with no success, so far. Please help

 

[Joe Picarello]

Pics

 

[riverofcode]

I'd put the cover back on your inverter(pic ending in _140736) as accessing that likely won't help you. Mine actually sits on the bottom of the bay where yours is vertical. You won't find what you are looking for in image _140727 that is 120vac either. I am not sure what the pic _115239 even is but resembles something that is 12vdc under my bed if I recall.

The _193213 image is the output from your generator and will only have 120vac on those if the generator is running and otherwise not have any power there. Those taped up connectors are split bolt clamps(see pics) and you probably don't want to play with them. I replaced that gray electrical box with a bigger one with DIN rail for some expansion I wanted to add.

The lid on _192632 image is where you could probe the back side of the breakers (CAREFULLY) when the generator is running for 120vac. My image above where all the little blue spade connectors is what your find inside it. My breakers are actually jumpered together and not actually split-phase. You can just make out the red jumper in the bottom right corner on the back side of the breakers of the pic above.

Do you have a wider image of under your bed? There has to be a transfer switch box somewhere near where your shore power enters. Mine is a Progressive Dynamics PD52DCSV... Amazon.com

 

[Skohlman]

Hello I think if you’re getting 120vac from the generator when running the generator is ok. If you’re not getting any voltage in the rv no shore power also. Then you have a problem with transfer relay

 

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I had an issue with the generator brushes; one brush was stuck in the holder for the exciter circuit causing no voltage output. Ordered new brushes from power tech, cleaned the collector rings install new brushes. Everything is good. Did you find your transfer switch that also could be your problem. Over time the terminals get loose, and they can burn and open the circuit causing no output. I had to replace one of the contactors that failed on my transfer switch.