No Power Affter Park Overnight

[Obey-One]

Citroen c5 2005 no power after park overnight why what is the problem?

[GiveMeABreak]

Your car battery very likely.

[Paul-R]

Do the headlights and horn still work or is there absolutely no power for anything?

[Obey-One]

Do the headlights and horn still work or is there absolutely no power for anything?

No power for anything

[Paul-R]

Do you have a voltmeter or multimeter to measure any voltage in the battery?

Have you checked your headlight switch to see if you accidentally left something on?

Regardless, I think you'll need to charge your battery up (depending on your voltage check) and see if anything comes to life that might have drained the battery - assuming the voltage check above shows it's down.

[Rp0thejester]

It could be caused by the fan over running, was the fan running after you got out of the car? Also do you have a permanent live 12v socket with something plugged into it?

[Obey-One]

Do you have a voltmeter or multimeter to measure any voltage in the battery?

Have you checked your headlight switch to see if you accidentally left something on?

Regardless, I think you'll need to charge your battery up (depending on your voltage check) and see if anything comes to life that might have drained the battery - assuming the voltage check above shows it's down.

Yes i have multimeter and the reading of voltage is 12.46..

and confirm no arther switch is on..

[Obey-One]

It could be caused by the fan over running, was the fan running after you got out of the car? Also do you have a permanent live 12v socket with something plugged into it?

no activitis include power switch is on or 12v socet.

[Paul-R]

12.46v is quite respectable. Does this drop when you try to start? Or when you switch on the headlamps?

[Obey-One]

12.46v is quite respectable. Does this drop when you try to start? Or when you switch on the headlamps?

my challenge is no power to start engine even with full battery, no indicator light

[Paul-R]

But the battery still has power? Using your multimeter can you trace along the various positive cables connected to the battery to see how far it gets?

[Armidillo]

So your starter motor is not responding when you turn the key, and the battery is not flat. Sounds like a faulty starter motor. Could be
a) starter solenoid not working (try whacking the starter with a hammer)
b) magnets have come unglued from starter housing, preventing the armature from rotating (don't whack it...)

I had both of these happen last year (on Peugeots - admittedly a bit older than your C5).

Easiest solution is to post up your VIN and ask Mark (GiveMeABreak) for the starter motor part number (you'll need to make a donation to the forum first). Once you know the part number you can go shopping for a replacement. I find Spareto very good at sending parts quickly to Australia - Alvadi is good too - so both should be able to send parts to you in Malaysia.

Cheers
Alec

[xantia_v6]

It might not be that simple, the ignition switch is not directly connected to the starter solenoid, the signal goes to the BSI, which decides if the starter should operate, and then to a relay in the BSM, before going to the solenoid.

It is not clear to me whether all the warning lights are coming on normally when the ignition is switched on. If not, then that should be investigated before looking at the starter circuit.

[Paul-R]

Also the headlights don't work. They're nothing to do with the starting system

[Armidillo]

Also the headlights don't work. They're nothing to do with the starting system

Economy mode?