2006 Ford E-450 battery wiring - which wire goes to the house?

StillRV

Senior Member
Joined
Oct 18, 2021
Posts
161
Location
Midwest
I have a 2006 Winnebago Outlook 24V on a 2006 Ford E-450 chassis. I've been trying to track down some parasitic drain, and I'd like to better understand the wiring at the chassis battery. There are 3 cables connected to the positive lug of the chassis battery. A very thick one that I'm sure goes to the starter solenoid, and two smaller ones that look to be 8 gauge or so. One smaller wire goes to the alternator. The other appears to head toward the under hood power distribution center (fuses & circuit breakers) for the chassis.

Where does the "house" connect? I do have a boost switch on the dash and solenoid back in the house, so I know the two batteries are connected somehow. The wire going to the solenoid is 1 gauge I believe. I have not attempted to trace from the boost solenoid to the under-hood yet (it's cold!). It must connect to the chassis starter solenoid? (the other end of that heavy red cable coming from the battery).

Another reason I'd like to understand this wire is I'd like to install a current monitor so I can see the house load on my alternator. I'm installing a DC-to-DC charger to charge my house lithium battery.
 
Yes, thank you!

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