My 2016 Fiat 500X suddenly won't start after about 2 weeks since the last time it started. No lights, nothing. I thought it was a discharged battery, so I tried jump starting using a portable jump starter but still nothing happens.
I also tried with another battery charger + jump starter combo pack that I have but that did nothing either - wouldn't jump start nor does the battery seem to be charging.
(And yes I did ensure those packs are charged and working.)
Could I be connecting it wrongly on the battery terminals?
I have attached a picture here showing where I connected the positive and negative clamps.
I connected the positive (red) end to the position marked in a RED circle in the picture - you will see two RED circles in the picture because I tried these two positions (separately).
I connected the negative (black) end to a nut marked in a BLUE circle on the picture. I couldn't find anywhere else suitable to connect to as a "ground".
Finally, a note:
Sometimes, after connecting and turning on either of the two jump starter / battery charger packs that I have, the car would make a loud warning alarm kind of sound at about 1-second intervals or so. I would have to turn off the packs and reposition the positive and negative clamps and then it would not sound the alarm when turning on the packs again. I don't know if this information helps figure out the problem, but just thought of adding it here.