Where To Attach Jump Leads C4 Cache Ltd 2008

[BIGTREV3476]

Hi Guys I alsays carry a set of jumper cables in my cars havent used in C4 but have had to turn away two requests as booklet doesnt show contact points can anyone body help me out. Thanks trev

[paul.h]

Welcome to the forum.

 

From memory, on the battery cover there is a flap which lifts up to reveal the battery positive terminal and on the battery end of the bonnet slam panel is a boss to use as the earth point/negative terminal. This is the same on the 2010 on C4.

 

You need to be careful if using your car to jump start another one to avoid possible damage to your electrics. If in any doubt, then deny having the jump leads and refuse to do it, that is what the RAC/AA/etc are for and they are cheaper than repairing your car and I am sure the other car owner would not help with any costs. The following is copied from the C4 Technical section pinned Common Problems post:

 

12. Odd electrical problems after jump starting another car.

This occurred on a Peugeot 406 but could apply to a Citroen. When jump starting another car a power spike caused the BSI software to become corrupt and the headlights would come on after the car was switched off and locked, causing the battery to go flat. It was possible to reprogramme another BSI to use but this may not always be the case, requiring a new BSI to be needed.

The problem is when you are jump starting, the regulator on the running (good) car senses a drain on itself and allows the regulator to put out more power to maintain 14.4v and if you just pull the jump lead off you are causing a power surge until the regulator adjusts itself. 9 out of 10 times it is fine but the 406 customer was just unlucky.

 

To help avoid this possibility when jump starting it is recommended to

 

- connect jump leads making sure you put the negative lead onto the engine of the flat car

- once the flat car is started do not take the leads off

- go into the good car and switch on the rear demister, headlights and foglights.

- then remove the jump leads

- now switch the headlight and demisters off one at a time.

 

This allows the regulator to catch up and regulate the power output. We are not talking about seconds here, its actually miliseconds for it to alter itself but its long enough to fry things.