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Old 06-04-2023, 07:50 PM   #1
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Join Date: Aug 2018
Posts: 12
FR3 Four wires connected directly to coach battery?

I am the new owner of a 2018 FR3 30DS. There are four wires connected directly to the positive terminal of one of the coach batteries. Anyone know if these are original and if so, what do they power? They all have inline fuse holders.
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Old 06-04-2023, 11:18 PM   #2
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Location: San Jose, CA
Posts: 995
Gonna go out on a limb and say

1 Alternator
2 Starter
3 Battery Control Center
4 Battery Emergency Boost Swtch
2019 FR3 33DS Motorhome
650 Watts Solar, 400Ah LIFEPO4, 2000 Watt Inverter, 40A DC/DC Charger, SumoSprings, Roadmaster Steering Stabilizer, BlueOx Trac Bar, Truma AquaGo WH, NVIDIA Shield TV
Days Camping
2019 57:2020 20:2021 30:2022 46:2023 47
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Old 06-05-2023, 06:39 AM   #3
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Posts: 12
Tnx for your reply Robo44. After posting I found a youtube video by FR on the house battery box. The fused wires are for the steps, the step lockout, the awning and the LP detector. An additional wire on the second battery is for the bunk motor. This seems to be the factory configuration.
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Old 06-05-2023, 08:00 AM   #4
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Posts: 7,393
This should be your FR3 configuration or close to it.
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File Type: pdf FR3 Battery Control Center.pdf (565.4 KB, 31 views)
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battery, fr3, wire

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