Test "A"

Connect test lamp from blue wire at 3-wire connector on steering column to ground. If lamp lights, check for open circuit in blue wire between connector and regulator. If lamp does not light, connect test lamp from brown wire at steering column connector to ground. If lamp lights, replace engagement switch. If lamp does not light, connect test lamp from each brown wire at brake switch to ground. If lamp lights in both instances, check for open circuit in wire to steering column connector. If lamp lights for one wire only, replace brake switch. If lamp does not light in either case, check for open circuit in wire to fuse block.