Car wont start - help asap

[Jemmane]

right, come1 was doing my audio for me and left the headunit on, so im assuming bat died as car wudnt start, we got jump leads but the car still wudnt charge up, got the battery on charge for a few hours and the car still wont chrage up, windows dont go down, car dont lock, hazzards dont work, but the headlights and stuff come on any1 know what it could be? its an 02 mk3 clio expression

 

[davidwilson666]

Do the headlights shine normally, or are they dim? Perhaps a fuse or two have blown.

 

[Jemmane]

they on normal checked battery again and its full, checked all fuses inside and engine bay and are all fine, i hear some clicking noise when i try to start, could it be the relays and cud just wiring speakers to the head unit set off anything else to stop the car from starting

 

[John DNA]

clicking noise, sounds like the starter motor solenoid trying to throw in but not having enough juice.

 

[seloc]

Could Be Starter But With Everything Like Hazards Not Working Then It Could Br The Uch Unit

 

[Jemmane]

The Uch Unit? whats that mate

 

[Jemmane]

bump.

 

[MattsClio]

I had the same ticking noise, trying to start. Got the RAC out, and he used one of his monster battery jump start things to get it going. Took a few attempts though. I'd say it is the battery

 

[Dan@SJM]

try bump starting it.

 

[ChrisE]

u checked the alternator cables?? i had similar with my valver, alternator cable had snapped off...!

 

[Jemmane]

i'll check the alterator cable, would buying a new battery help if its not the cable. my hazzard lights dont even come on but the head lights work etc, check all fuses in and out and all fine

 

[dyp]

have you got a multimeter??? measure the voltage of the battery

 

[John DNA]

Once the battery has been fully charged the car should start initially whether the alternator connection is faulty or not, measuring the voltage in a non load situation can be misleading, if the battery has screw tops, which many don't now as they're sealed you can look in and see if the plates are wared, if they are it's shagged.
Anyway if it starts once fully charged then measure the battery voltage whilst the engine is running, you should see around 13.5 Volts which will indicate the alternator is indeed charging. If you see a voltage gradually droppng then it's clear there's a problem somewhere in the charge circuit.

 

[MATT BLACK]

Its your UCH BIC - independant ECU / fuse board, situated under the dash on the passengers side of the car. Its directly above the bonnet release handle. Pull it out of its bracket and undo all the terminals and reconnect them. Retry your electrical ancileries - that should cure the fault. If not you will need a new UCH.

http://www.cliosport.net/forum/showthread.php?t=119569&highlight=uch