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Topic: Lost power to dash/key switch - engine batts (Read 419 times) previous topic - next topic

Lost power to dash/key switch - engine batts

We're out boondocking not too far from civilization.  Got here last night with no issues.  Ran the generator this morning to charge the batteries.  Left the coach about 7am with the generator running, dash cigarette lighter voltage gauges showing 14.3 volts, charging.  Shut the generator off remotely about 3.5 hrs later.  Came back to the coach at lunch and find no dash cigarette lighter voltage on the chassis side.  House side showing 12.8V.  Turn the key, nothing.  No dinger, no dash lights, nothing.  After some time, the cigarette lighter voltage started showing again, but if I turn the key on, it goes out and there is still nothing at the dash.  Takes a while for it to reset and show voltage again...last time took 40 mins.  Odd.

Fired the generator and it is charging the house batts (dash cig lighter showing 14.1V now), but still no voltage on showing on the cigarette lighter for the chassis.  Going to check if the BEP voltage sensing relay is showing power being sent to the chassis batteries.

Going to grab the schematics, but if you guys have some suggestions, I'm all ears.

Edited to add:  Checked chassis batteries - 12.87V at the batteries.  Checked power at boost solenoid, normal on house batteries, 2.4V on chassis side.  Checked positive post on starter, 2.4V.  What is between the house batteries and the starter or boost solenoid that could cause a loss of power? 
Keith
2003 U320 38' #6197

Re: Lost power to dash/key switch - engine batts

Reply #1 –
The salesman switch?
1993 U225 Build #: 4285
500 Watts Solar
Honda CRV AWD
Former 1981 Foretravel Travco
Retired, Full Time Off Grid Snowbird

Re: Lost power to dash/key switch - engine batts

Reply #2 –
Pretty sure that's just for the house batteries, not the chassis batteries.  I've never turned it off and everything inside works...just not the dash or key switch.
Keith
2003 U320 38' #6197

Re: Lost power to dash/key switch - engine batts

Reply #3 –
There is a wire lug mounted between the batteries and the starter. Suspect you will find resistant or indication of burns. Both for power and ground.

Re: Lost power to dash/key switch - engine batts

Reply #4 –
I hate intermittent issues.  Ran the generator for about an hour and now I see the chassis cigarette lighter has 14.2V.  Checked the voltage at the boost solenoid and starter...both at 14.2V also.  Turned the key on, everything working once again.  Makes no sense.

Keith
2003 U320 38' #6197

Re: Lost power to dash/key switch - engine batts

Reply #5 –
Load cell , battery charger, test lights and a volt meter, Its not intermittent, its hiding in plain sight.
Scott
 

Re: Lost power to dash/key switch - engine batts

Reply #6 –
Check all chassis battery connectors
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins