I have an occasional and intermittent problem with loss of DC coach power. Here's the scenario: I drive into a rest area for a "comfort" stop, turn the engine off, switch the water pump on, it doesn't come on, further investigation reveals no DC power in the coach. I don't lose DC power every time the engine is turned off, but when I do starting the engine or plugging into shore power restores DC power. What might cause this, and what is the fix?Coach is a 2004 Fleetwood Pace Arrow, on a Workhorse chassis.

I had that same problem. It turned out to be a defective disconnect someone installed on the - side of the house battery service. Intermittent problem.MIne looked like this

Your batteries are probably bad or the connections to the batteries are corroded and loose. Shore Power/Genset and starting the chassis engine just uses the Alternator(chassis) or the Power Converter(Inverter/charger) on Shore or Genset. Doug

I had that problem and it was a bad relay that the "salesman" switch was connected to.

darsben1 wrote:I had that same problem. It turned out to be a defective disconnect someone installed on the - side of the house battery service. Intermittent problem.MIne looked like thisI don't have one of those.

BillofPA wrote:I had that problem and it was a bad relay that the "salesman" switch was connected to.I suspect this as well.

intermittent loss of DC coach electricity | Good Sam Community

16 Replies

Jim_Bakker
Explorer
Jul 17, 2017
dougrainer wrote:
Your batteries are probably bad or the connections to the batteries are corroded and loose. Shore Power/Genset and starting the chassis engine just uses the Alternator(chassis) or the Power Converter(Inverter/charger) on Shore or Genset. Doug

Batteries are fairly new, but I'll "break and make" the post connections.
Jim_Bakker
Explorer
Jul 17, 2017
BillofPA wrote:
I had that problem and it was a bad relay that the "salesman" switch was connected to.

I suspect this as well.
Jim_Bakker
Explorer
Jul 17, 2017
darsben1 wrote:
I had that same problem. It turned out to be a defective disconnect someone installed on the - side of the house battery service. Intermittent problem.

MIne looked like this

I don't have one of those.
BillofPA
Explorer
Jul 16, 2017
I had that problem and it was a bad relay that the "salesman" switch was connected to.
dougrainer
Nomad
Jul 16, 2017
Your batteries are probably bad or the connections to the batteries are corroded and loose. Shore Power/Genset and starting the chassis engine just uses the Alternator(chassis) or the Power Converter(Inverter/charger) on Shore or Genset. Doug
darsben1
Explorer
Jul 16, 2017
I had that same problem. It turned out to be a defective disconnect someone installed on the - side of the house battery service. Intermittent problem.

MIne looked like this

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intermittent loss of DC coach electricity

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