2000 GEM E-825 Changed batts, now won't go

Put in two new 12v batts (front). Now when the key is on, and the brake on, -109 shows on charge status. With brake off charge shows 225, not 100! Any advice? Thanks. Won’t go forward, or reverse.

I don’t know of any codes higher than -77. If the voltage is too high you should get -16. If the voltage is too low, you should get -15. Check the combined voltage of all six batteries and ensure that they are connected together properly.