Battery check Peugeot 407 2004 - 2011 | Haynes Manuals
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Locate the battery
Open the battery cover
Check the Negative (-) terminal clamp is tight
Check the Positive (+) terminal clamp is tight. CAUTION If using a spanner to tighten terminal, be careful not to short it on the bodywork. Replace cover
Check battery is generally secure, if loose, tighten the battery retainer
Tighten if required, a 10mm 'square' socket is needed. Not too tight because you may damage the battery casing
Replace the battery cover