Leaderboard

I agree with the principal assertion here that the battery on the vehicle has to be suspect, followed by: 1. A corroded / suspect earth point(s). 2. A failed Starter Motor. I would not try a jump start from a slave vehicle as that may transfer issues from one to the other. Start by fully charging the existing battery using the correct charger such as a Ring Automotive Smart Charger, the version with the LCD screen that indicates the battery status when charging. A battery that can take a charge should be able to be at 90% within 12 hours of connecting up and switching on. REMEMBER you are dealing with an AGM battery so it is vital the chosen charger has that capability. As given earlier, if a "standard" charger has already been used, then the innards of the AGM battery may already be shredded. If you are not confident with battery tests, or indeed don't have access to the correct charger, then remove the battery from the car and hand it to a qualified Auto Electrician to both charge and test. You need to eliminate possible causes in an ordered manner. N6 JMX

Hi Dave. Wow, you know your stuff. Thanks again for your input. I'll look into your suggestions. Cheers, Graham.

Hi Ross Are you certain that the booster pack you used was fully charged, and powerful enough to start the engine? Re-reading your original post in isolation I would say dodgy battery. A decent starter pack will only require engaging "Boost" if it is unable to detect a voltage in the vehicle battery. To then only do a couple of turns with a fully charged starter pack suggest either the starter pack is not powerful enough (or is itself flat) OR their is a massive short when the starter is engaged. Just because a battery reads over 12v at rest does not mean it is OK. My wifes Skoda failed to start last week. Started fine with my Noco GB50 attached but initial quick test by garage said battery was OK and at 80%. Only when tested again 2 days later did it show as knackered. New battery and now running fine. Is it possible to try a jump start from another car with heavy duty jump cables?

Hi Ross Can we just go back and explore in more detail exactly what happens when you try and start the car? Are the key batteries OK? Does the car show any signs of "waking up" when unlocked? Have you tried starting with the key held over the sensor? Any lights on the dash? Have you tried jump starting from another car / starter pack? etc Regards John