FORD 2002 E-450 v.1 - Manual (Page 225)

2. Wrap the secondary positive cable
with a non-conductive material to
insulate.
3. Disconnect the primary battery
ground cable.
4. Disconnect the primary battery
positive cable.
Connect:
Secondary positive cable remains energized after disconnection.
make sure the tool does not contact any ground surface.
1. Reconnect the primary battery
positive cable.
2. Reconnect the primary battery
ground cable.
Maintenance and specifications
225