I have a 1978 Itasca Winnebago, 24 foot length. Found out today that the inside lights do not work, 12 volt powered lights in the back. They used to work. Have done nothing with it this summer.Lights used to work. Checked the fuse box under dash by steering wheel. Fuses there are good.Headlights,wiper,horn, dash radio work. Battery good, wires to battery good. Generator in rear does not start. Separate problem.Water pump in back also does not work, used to work. Any help appreciated. No reference book to go to.

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Comment by Mark Beauchamp on November 23, 2013 at 11:26pm
You might also check your ground wire, I have had a few coaches with this issue, try pulling a light fixture and try a jump wire to ground and then also jump to the positive side if nothing happened with the ground, also check your chassis ground. A lot of the older coaches did not use a designated ground wire to each light or appliance, they used the coach skin and that caused a lot of bad issues...
Comment by Grey Wolf on October 11, 2013 at 11:52pm

Thanks Ill try all your tips and advice and see what happens.

Comment by Jimco_W001 on October 11, 2013 at 4:57pm

If I leave a 12 volt light on that's connected to the RV's house battery system and then if it gets brighter after the engine is started I know that the chassis alternator can charge the house battery.The light should still work even with out a house battery installed if the engine alternator is working and connected to the house battery system.

Comment by Lakota Wolf on October 11, 2013 at 3:59pm

You should have a fuse block near or attached to your Power converter/inverer. Several have a/c and d/c fuses. Where shore power line goes to. Check those.

Comment by John "T" Nordhoff on October 11, 2013 at 3:51pm

 Hey Wolf Man, You are aware that 12 VDC RV interior lights and vent fans and water pumps etc do NOT get power from the engine battery nor any of the regular engine fuses (under dash or under hood etc) etc right???? Don't you have a 12 volt Coach/House battery somewhere??? If its discharged NONE of the interior lights or fans or water pumps can work. HOWEVER if the RV is plugged into shore power the Converter/Charger will charge the coach battery PLUS serve all those interior 12 volt loads. Also on most RV's when the engine is running a solenoid engages or battery isolator that will charge the coach battery plus power those fixtures.....Check for a run down coach battery, charge it up and/or plug the RV into shore power which will charge it n see what happens

 

 John T in Indiana (Now in Austin Texas in my RV)

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