Can you tell me where to connect the jump cables on the Audi A4 3.0 battery-there looks like only one lead??

There may come a time when you try to start your vehicle...and nothing happens. In those situations, a dead or discharged battery is often the culprit.
There are a couple of ways to check: If the starter clicks or makes no sound, and the headlights are dim or don't turn on at all, chances are it's the battery.
Thankfully, jump-starting a vehicle is easy. All it takes is a set of jumper cables and another running vehicle, and you'll be on your way.
Before you start
There are a few things you should do before starting step 1:

• Read the safety, jump-starting, and roadside emergency information in your owner's manual
• Have your roadside assistance number handy

Locate a pair of color-coded jumper cables and a wire brush for removing battery terminal corrosion

Find each vehicle's battery: They can be under the hood or in the trunk

Remove any metal jewelry like rings or bracelets to avoid accidental shocks while working near the battery

Don't disconnect the disabled battery-it could damage the vehicle's electrical system

1. Move the boosting vehicle close to, but not touching, the vehicle with the dead battery so the jumper cables can connect without being taut. Put both vehicles in Park or Neutral, turn off their ignitions, and set their parking brakes. Turn off or unplug all power-draining items: lights, electronic accessories, and portable devices plugged into auxiliary outlets.
2. Open the hood or trunk and remove any battery terminal covers. If you see chalky corrosion on the terminals, remove it with a wire brush terminal cleaner.
3. Clamp the red positive (+) cable onto the disabled vehicle's red positive (+) battery terminal.
4. Next, connect the other end of the red positive (+) cable to the booster vehicle's red positive (+) battery terminal.
5. Now connect the black negative (-) clamp to the booster vehicle's black negative (-) battery terminal.
6. Connect the other end of the black negative (-) cable to a large, unpainted metal surface in the disabled vehicle's engine bay, away from the battery and the engine itself. Make sure the cables are clear of any moving parts.
7. After a final check, start the booster vehicle. Then try to start the disabled vehicle: Usually it will start right up, but it may need to charge for a few minutes before starting. Once it starts, allow both vehicles to run connected for about three minutes.
8. Without turning off the jump-started vehicle's engine, disconnect the cables in the reverse order that they were attached, and close the hoods/trunks.
9. Allow the jump-started vehicle's engine to run for several minutes. Depending on how discharged it is, the battery may not be able to start again under its own power, so keep it running until you reach your destination.
10. Visit your local Ford Dealership as soon as possible to get the jump-started battery tested or replaced.

Put a multimeter across the battery and measure the voltage.. hopefully you get around 12.5V give or take..
Start the engine and check again, this time you are looking for around 14.2 - 14.6v
If you get less than 14v even if you rev it to 2000 rpm, then the alternator could be on it's way out.
If all is fine, you need to measure the dark current.. this is what is being drawn from the battery when not in use.
Remove one battery lead, and connect the multimeter set to amps between the lead and battery,, do not turn anything on. the reading should be maybe 25mA at the most.. anything much higher, and you have a drain somewhere.. could be the alternator rectifier breaking down, or a partial short.

Check Engine light on after the battery jump start? scan the vehicle for any code that may have occurred and check the charging system

You want to use the battery in the engine compartment, the one the alternator charges. I just connect the batteries directly pole to pole. When you rev up the engine the alternator will increase the output going into your battery.

place the red lead (positive terminal) from the jumper battery to the positive terminal of the audi battery. connect the negative lead from the jumper battery to the engine of the audi ( select a metal part that the clamp will fit on) Connecting to the negative terminal of the audi battery runs the risk of a power surge that may damage the ECM of the audi. If jumping from another vehicle run the jumper engine at around 2000rpms before trying to start the audi

Once the battery goes flat so the immobliser comes on.you need to reset the system as soon as you connect up the jump leads,then try and start it OR charge the battery up in the car (take off one of the leads before you do this)see my tips re alarm reset for VW as they are the same.

Hi, When jump starting this vehicle make sure that the Q7 is connected first, then connect to the jumper vehicle. Connect 1 lead to the positive on the Q7 and the negative to a good solid body part or engine part. This will then ensure that the vehicle will start on the jumper vehicles battery directly without going through the Q7 flat battery causing the electronics to strain.
Hope this helped.
Thanks
Jason

On the 2005 Audi A6 3.2 (6 cylinder) the battery is stored in the right rear trunk, under the trunk floor lid. Note: To jump start the car, you simply raise the engine hood, and look in the upper left corner of the engine compartment, just slightly below the plastic cover. There you will see connections that lead to the battery and are specifically designed for jumping (or charging) the battery. You will need to lift up gently on a reddish brown cover which is protecting the positive terminal. The negative terminal (black) is not covered.
Under no circumstances should you attempt to jump the battery directly. The battery could explode and you could get sulfuric acid on your face and in your eyes, which would be bad. Very bad.

Be ceratin you have jumper cables to correct terminals. Also, you may connect both jumper cables to the battery of the car your getting power from (be certain not to let other ends of cables touch) connect the positive lead of car being jumped to the battery's positive terminal, then connect the negative lead to the cars ground, not directly to the negative on the battery. Getting a spark when jumping is very common. You do not want to create the spark at the battery because the fumes from the battery acid can be explosive...... That can go very bad! When removing remove the grounded, to the jumped car, and then carefully remove the rest. Again be certain to not let the leads touch.

Please let me know if this had assited you,

Thanks,
Tom

To jump start any car, you will need to have either a portable jump starter (that look like the ones found here: http://www.autobarn.com.au/products/7/45/3022812/) or have jumper leads which look like alligator clips.

To use either option, attach one side of the jumper cables to to your battery, then attach the other end to another car battery (or in the case of the portable jump starter, it will be already connected with the unit).

Ensure the correct color cable is attached to the correct battery terminal (metal point on battery), i.e. red to red, black to black.

Caution: Car batteries have a high amperage and can lead to electrocution if you touch both metal points on the battery. Always be careful when doing so and if unsure, do not attempt to do so without assistance from a competent individual.