RPO 8BO Duel Batterys on silverado
I bought a new to me truck that replaces my S10.. Astounded to find dual batterys under the hood..I have RPO code 8bo. From what I can find this is for the camper. There is a relay that seperate...
Forum Discussion
GordonThree wrote:
I'd check fuses and wiring to find out why that second battery wasn't charging. 9v is ruined.
As far as adding to your power reserve for camping, it's possible but you'll need extra wiring. The factory wiring isn't setup for powering much of a load on the 7way connector.
I'd go this route:
A 4 gauge wire running from that accessory terminal back to the hitch will help move that extra power. A similar wire on the trailer into the batteries will link them together.
Use a heavy duty connector like the Anderson power pole. Use a 4 gauge wire for ground on both sides too, doesn't need to be long, any easy to get to screw or bolt you can put a wiring terminal under.
The battery was charging... Before I removed the batt it was charging and showing 14 volts or so. but with ignition off it was 9 volts... starting batt showed the same but with ign off stayed at 12.7...
I understand the 7 way has a small wire to the charging circuit. Thats no worries.
