FORD 2003 E-550 v.1 - Manual (Page 187)

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.
3. Unwrap the secondary positive
cable and reconnect to the primary
battery terminal.
ENGINE COOLANT
Checking engine coolant
The concentration and level of engine coolant should be checked at the
mileage intervals listed in the scheduled maintenance guide. The coolant
Maintenance and Specifications
187