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Old 06-30-2019, 08:43 AM   #1
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Grey Wire on hot side of Battery Switch???

I just purchased a 2019 FLagstaff 5th Wheel 524LWS.
I am adding solar and a second battery. I was looking at the battery switch.
I am a believer in battery cut offs but thought they should cut EVERYTHiNG off!
I noticed that there is a small gray wire attached to the "always hot" side of the battery switch.

Any idea what this wire is for? Maybe smoke/CO detectors????

First post here but I am no rookie when it comes to forums and RV repairs and maintenance.

I will say that a Hungry Italian must have wired this thing as it reminds me a bowl of Spaghetti!
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Old 06-30-2019, 08:47 AM   #2
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Most likely CO/Propane detector as many are wired around the cutoff switch for safety reasons. Other items that are sometimes wired around the cutoff ( slide/tongue jack/breakaway) would require heavier wire.
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Old 06-30-2019, 11:59 AM   #3
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Quote:
Originally Posted by Shrimpy View Post
I will say that a Hungry Italian must have wired this thing as it reminds me a bowl of Spaghetti!
Not just yours. Mine was the same mess even though just a "bumper pull".

I spend a total of several days just re-wiring battery system all the way to the converter. Upsized main wire and seriously cleaned up the "spaghetti" by installing a couple of bus bars and an enclosure designed specifically for the unbilical cord feeding tail/brake/running lights as well as +12V and Ground.

Also changed batteries to Battleborn LiFePo and added a DC-DC charger so my Tow Vehicle actually charges the trailer batteries at a decent rate (even though the voltage at the LiFePo batteries is much higher than FLA's.


I installed a separate battery shut-off switch where the batteries are now mounted, inside. Left the OE battery switch in place although now it only supplies power to jack and I can keep "busy little fingers" from messing with my tongue jack by switching power off at old battery shut-off.

When not in use I shut off Propane so I don't worry about the alarm being "dead" during storage.
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