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2015 Honda Accord

Replaced the battery in my wife's car. After replacing the battery, it seems as though none of these things work when the car is off - Headlights, Dome light, Power locks, key fob (tried both the regular and backup fob).

When you turn the car on, all of these things work totally fine.

Not sure where to look to solve the problem.

Edit: When replacing the battery, I used one of those memory savers plugged into the OBD2 port. Had it plugged into the 12v cigarette lighter of my other car for the power source. I just discovered that I can't get power to the OBD2 port, even when the car is on.

  • What do you mean by ‘car is off’? Ignition off or engine not running? – HandyHowie Nov 18 '19 at 20:32
  • Ignition is off. No key in ignition. – mang Nov 18 '19 at 20:35
  • Is this to say that before you replaced the battery all these accessories were working with no key in the ignition? – Tedwin Nov 18 '19 at 23:26
  • Correct. Everything was fine prior to the battery change. – mang Nov 19 '19 at 4:39
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    Have you checked all of the fuses? – HandyHowie Nov 20 '19 at 8:16
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So this ended up being a blown fuse, as expected. #21 under the hood. Labeled in the owner's manual as "Back Up". 10 Amp. The shop I took it to was nice enough to include a big print out of all of the functions for each fuse, and all of the things broken were connected to this fuse. Couldn't find any detailed information on the internet for this, and it could have saved me a lot of time and 110 bucks. Oh well. Glad I have the info now for all of the fuses and their functions.

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