I used 2014 Avalon to jump start 2013 Tahoe w/ dead battery, now Avalon won’t start.

Asked by GuruZSM3W Nov 04, 2017 at 04:57 PM about the 2014 Toyota Avalon XLE

Question type: Maintenance & Repair

Hooked jumper cables directly to each vehicles battery.  Tahoe need more
electrical juice so I attempted to start the Avalon while both batteries were
connected.  The Avalon would not start makes a clicking sound only.  Push
the start again and clicking sound goes away.  Disconnected the Avalon
battery hoping to erase problem, didn’t work, disconnected both main
electrical harnesses, didn’t work.   I’m out of ideas can anyone respond w/
other suggestions.  Thanks in advance!

1 Answer

241,685

Bad part is you disconnected the battery, so if there were any codes that could help anyone along are now gone, and you could have also lost the factory presets. So now you have to go to square one, have the battery tested on the Avalon, jump starting can ruin a good battery due to the sudden amperage demands, if it test bad or even marginal replace it. Now that you have a good source of power see if you get anything inside like dome lights, check the headlights see if they turn on with the switch, if that's a go then see if it will start and run, if it does you may have dodged a big bullet to the pocket book, if it doesn't then check for blown main fuses inside the power distribution box that is under the hood, it will be obvious if one or more are blown. If mains are good and still nothing then I suggest that you have it towed to your Toyota dealer too find out just how much damage was done. Buy a good jump box and keep it charged just for such problems, if it won't turn over with a jump box then the battery is too far gone and will either need to be trickle charged over night or replaced. Also remember today's alternators will burn out if you try to charge a badly discharged battery. Good Luck.

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