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Old 06-07-2008, 07:00 AM   #1
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have a95 monaco discovery, alternator failed and installed new one, i see the battery isolator and there is big solenoid under it, when you press the emergancy swith it makes clicking noise, but no power is transfered to crank battery, i checked the solenoid both terminals are hot, can anyone explain how this solenoid is supposed to be wiored, it looks like the two battery hot leads go to both side of the solenoid, is the correct it makes no sense to have to hot leads on the solenoid, thanks
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Old 06-07-2008, 07:00 AM   #2
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have a95 monaco discovery, alternator failed and installed new one, i see the battery isolator and there is big solenoid under it, when you press the emergancy swith it makes clicking noise, but no power is transfered to crank battery, i checked the solenoid both terminals are hot, can anyone explain how this solenoid is supposed to be wiored, it looks like the two battery hot leads go to both side of the solenoid, is the correct it makes no sense to have to hot leads on the solenoid, thanks
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Old 06-07-2008, 09:16 AM   #3
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Perhaps it's the house battery disconnect switch.
If so and you are connected to shore power you would see voltage on both sides.

When it is first switched off, the battery voltage will still read the converter voltage of 13.6 volts or so but will begin to drop to the actual battery voltage of 12.6 volts (if fully charged) as the surface charge on the plates is absorbed.

That would explain why you see voltage on both posts.

EDIT:
On rereading your post I see you said it clicked when you pressed the emergency start (AUX on my coach) switch.
If there is voltage on the chassis battery and voltage on the house battery you would see voltage from the chassis battery on one post and voltage from the house battery on the other one so that would be normal. That switch connects the two batteries together when pushed.
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Old 06-07-2008, 11:58 AM   #4
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Of course it makes sense... Stop and think.. How do you JUMP and battery? + to + & - to -...
and thats what your doing.. your jumping the house battery to the coach battery and the solinoid is just a switch to connect them when you need a jump. Plus the negatives are already connected at the frame.
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