Peugeot 405 electrical problem

Honest John Back Room » Technical matters
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Sat 9 Jun 2007 11:25
Peugeot 405 electrical problem - badgers
Hi folks, the legend of the courier 405 continues....
the ol' girl has developed a most interesting problem! As you drive at night, the lights and dashlights get dimmer and dimmer until they can't be seen, as they get very dim, the airbag warning light on the steering wheel comes on. About now you roll onto the hard shoulder, suspecting a flat battery caused by an alternator problem, but the horn and the indicators are fine; you switch the lights off but not the engine and after about a minute the 'no charge' light comes on on the dashboard if you depress the wellie pedal now, the charge light goes out, as does the airbag light, and all is fine, everything works for about 50 miles until it all starts again. The car is a 94 non turbo 1.9 estate and I had modified the silly battery connections and cleaned and vaselined all the connections to battery, starter motor and alternator etc. Any ideas would be most welcome! Thanks in advance.


Subject amended to make it more searchable later - PU
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Sat 9 Jun 2007 11:44
Peugeot 405 electrical problem - injection doc
The lights get dimmer because the drain is more than likly bigger than the charge, you need to check battery voltage with a voltmeter with the lights on & off!. The horn & indicators require less current than the head lights hence they still work, It may be worth checking earth straps for engine & headlamp earths.
If the earths are all sound then suspect alternator problem! you should have 13.8-14.2 volts running at the battery with & without elecs on. If it drops below 13 with lights on you have a nackered alternator or slack belt or bad connection
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