Opel ASTRA Owner's Manual page 236

234 Vehicle care
● Do not lean over the vehicle
battery during jump starting.
● Do not allow the terminals of one
lead to touch those of the other
lead.
● The vehicles must not come into
contact with each other during
the jump starting process.
● Apply the parking brake,
transmission in neutral,
automatic transmission in P.
● Open the positive terminal
protection cap of your vehicle in
the engine compartment and of
the booster vehicle battery.
Lead connection order:
1. Connect the red lead to the
positive terminal of the booster
vehicle battery.
2. Connect the other end of the red
lead to the positive terminal of
your vehicle near the fuse box in
the engine compartment.
3. Connect the black lead to the
negative terminal of the booster
vehicle battery.
4. Connect the other end of the black
lead to a vehicle grounding point
of your vehicle in the engine
compartment.
Route the leads so that they cannot
catch on rotating parts in the engine
compartment.
To start the engine:
1. Start the engine of the vehicle
providing the jump.
2. After five minutes, start the other
engine. Start attempts should be
made for no longer than
15 seconds at an interval of one
minute.
3. Allow both engines to idle for
approx. three minutes with the
leads connected.
4. Switch on electrical consumers
(e.g. headlights, heated rear
window) of the vehicle receiving
the jump start.
5. Reverse above sequence exactly
when removing leads.