Vauxhall Astra Owner's Manual page 199

Connect the lea ds in the order shown in the
illustration:
1. Connect one end of the first jump lead to
the positiv e terminal 1 of the battery
prov iding the jump start (identified by
"+" sign on battery case or terminal).
2. Connect the other end of this lea d to the
positive terminal 2 of the discharged
battery (" +" sign).
3. Connect the first end of the other jump
lead to the negativ e terminal 3 of the
battery prov iding the start ("–" sign).
4. Connect the other end of the second
jump lead 4 to ground on the other
vehicle, e. g. engine block or screw
connection in the engine suspension.
z Do not connect leads to negative
term inal of discharged battery!
z The connection p oint should be as far
away from the discharged battery as
possible.
z Route the lead s so that they cannot
catch on rotating parts in the engine
compa rtm ent.
z The engine of the vehicle providing the
jump start can be allowed to run during
starting. Attempts to start the engine of
the vehicle with the discharged battery
should b e m ade at intervals of one
minute a nd should not last long er than
15 second s. After sta rting, allow both
eng ines to idle for ap prox . 3 minutes with
the leads still connected.
z In order to a void ex cess voltage in the
electric al sy stem, b efore removing a
lead, sw itc h on a n electrica l consumer
(e.g. light, heated rear window) in the
vehicle receiving the jump sta rt.
z Reverse abov e seq uence exac tly when
removing leads.
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