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Old 02-07-2016, 01:59 PM   #1
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Coach lights

My coach lights don't work on 12 volt but do work while the generator is running or plugged in battery is charged any one have any ideas. Also how can i get a coach wiring diagram it is a 1991 30ft alumilite on a ford chassis
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Old 02-07-2016, 02:07 PM   #2
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Inverter is working

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Originally Posted by h20allen View Post
My coach lights don't work on 12 volt but do work while the generator is running or plugged in battery is charged any one have any ideas. Also how can i get a coach wiring diagram it is a 1991 30ft alumilite on a ford chassis
If they work on shore power or with the generator, That means the Inverter is working. It could be the transfer switch a fuse from the battery or a cable.
Mel
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Old 02-08-2016, 10:46 AM   #3
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Coach lights

Where would the transfer switch be located?
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Old 02-08-2016, 11:57 AM   #4
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If the lights work with Shore Power and Generator, then the AC converter is doing its job. The transfer switch is also not a problem.

The path from the Battery to the 12v lights is corrupted in some manner. It could be:

Dead Battery
Battery Cut Off switch is Off
Fuse between Battery and Light Circuit is blown
Loose contact at Battery
Dirty Contact at Battery
Bad Ground at Battery
Broken wire in Light Circuit
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Old 02-08-2016, 12:02 PM   #5
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+1 on what deandec stated.

At some point in your wiring, the output of the converter and batteries come together. From this point on towards the coach, everything is fine.

Your problem is the batteries are not connected to this "common point".
Dead batteries, blown fuse (large fuse, like 100 amp or so), faulty disconnect switch, corroded connection.

Sorry....I basically just repeated what deandec said...so it must be true.....

Regards,

Dan
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