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.

Try opening and then closing the master switch under the seat. Did you get the polarity correct on the batteries?