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Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 4708
Experience:  Fully qualified / self employed garage technician in the UK
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Renault clio 1.2 07reg electric fault , car as had a new battery,

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Renault clio 1.2 07reg electric fault , car as had a new battery, but after a few days it goes flat no warning lights on. what could be the fault, and is it expensive to put wright

Cost depends on whats actually faulty and drawing power from the battery when it shouldnt essentially a parasitic battery drain or short somewhere.but the charging system needs to be checked first to ensure your alternator is charging next.of course the obvious things like lights/number plate lights anything in the car plugged in or been aftermarket fitted inc towbar if fitted needs to be checked out - the next step on checks bases requires to attach a test light/ digital multimeter between the negative battery cable end and the negative battery terminal. The test light should illuminate extremely dimly or not at all. If the test light is on brightly or quite bright there is a sign there is an electrical draw in the system. To locate you will need to start removing and refitting fuses "one" at a time so you'll need to be careful which ones you pull so you'll need to refer to the manual each time or the lid and start of with the known ones first in particular as far as the fuse(s) and work your way through them and keep referring the to testlight/multimeter etc to see any change each time one fuse is pulled.if no change then put it back in and move to the next one. if or which ever fuse is removed and the test light goes out or voltage drops on multimeter the circuit in question has been located or thats where the draw is. You will need to identify that pulled fuse and what it covers within the car and that should be where the parasitic drain is on that circuit in which next you have to get a wiring diagram and then trace that circuit..if thats not something you can carry out yourself then any reputable auto electrician should be able to track it down..
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