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Old 03-29-2018, 09:34 AM   #1
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1986 Coachmen E350 stupid mistake

Made a stupid mistake last night, hooked up my cab battery backwards. It was not hooked up to the house feed, so any damage -should- be limited to the cab area. Point being; with fresh battery, nothing works. Can't seem to locate any burnt fusible links or blown fuses. Rig is powered by a gas 460 engine if that helps. Any suggestions? I -could- call AAA for a no-start condition, but i'd rather not waste service call for this. BTW my old Southwind went South with a couple of Army guys six years ago; I wonder if they still have that big ol' beast?
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Old 03-29-2018, 10:45 AM   #2
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I think you'll have to trace power from the battery on to all chassis systems. If you're lucky it's just a fuse or circuit breaker if not, it could be the ECU and other electronic components.
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Old 03-29-2018, 11:03 AM   #3
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Sometimes you can kill the alternator. If accessible to remove easily, it's worth taking into a parts store for testing it's health(if no other smoking gun is present).
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Old 03-29-2018, 11:13 AM   #4
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Quote:
Originally Posted by sachilles View Post
Sometimes you can kill the alternator. If accessible to remove easily, it's worth taking into a parts store for testing it's health(if no other smoking gun is present).
If the charging system was zapped, the time to remove and test or rebuild the alternator would be after the engine is running and showing no charge.

Are the lights, wiper, HVAC fan coming on? If not, start at the battery and trace power. You might have a fusible link or other simple reason to find first.

When you hear hoofbeats, think horses first, not zebras.
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Old 03-29-2018, 11:23 AM   #5
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If nothing works, like starting and lights, its not your alternator, " yet ".

Look near the starter solenoid for fusable links. They will be a rubber bulge in the wire with a small flag on them.
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