We have a 2018 EX. Like it except for some ongoing issues with it.

The most recent problem is that the car battery drains overnight while it's sitting. Or parked for a work shift. Jump start gets it going. Push button start, fwiw. Checked keyfobs.

Noticed that the car makes a rapid click click click sound (sounds like it's coming from under the dash, hard to pinpoint) when sitting. Doesn't matter if you are in it or not. This is without attempting to start the car. It *seems* like whatever clicks might be the reason the battery dies. (we did get a new battery, thinking at first the old one was bad. Same issue. Note: car came with the larger battery)

What would be all that clicking while the car is just sitting? The dash lights flicker as well. I did not notice the headlights going on or off. I have read plenty of posts about bad starters (try to start, get a click, no go), but this is clicking without trying to start. Note that it does not now start reliably, either.

I've done a search here and on Google and can't quite find a case of the car just clicking away while sitting.

Also, are there any relay diagrams available for 3rd gens? I find plenty for the fuses, but nothing for the relays. If there aren't, does anyone know what the blue relay under the steering wheel is (of the three, it's on the right). Is that Fuel Pump?

Thanks.

 

aftermarket alarm relay?...stick head under dash....try and find clicking relay....its a relay...there are quite a few in the car under dash.....upon rereading post i see you have done all that.......an online manual does not seem to exist for this exact car


Honda Jazz / Honda Fit GE8 2009 onwards Online Repair Manual


best i found.....

 

hmmm.....doing some light reading on the forum......on my 2015 i do not THINK i have that............

My 2017 had reoccurring dead battery issues where you would push the start button and nothing would happen but if you jump started it it would fire right up. Finally found out in the middle of the night the electrical system was somehow turning on and draining the battery. Turned out it was a faulty sensor (one that has something to do with alerting you about the hood being closed or tampered with) disconnected that and haven’t had any problems.

 

Also have the IMMOBILIZER software updated as that has a issue where it causes a parasitic drain..