2013 Scion FRS won't start - Not Battery!
 

Hey everyone, so my car was perfectly fine right before I parked it. I just went for a carwash and then came back. After about a couple hours I went to go start the car and everything was normal until I turned the key to the on position and started to crank it. First turn of the key and all the electrical cut off. No engine turnover or anything occurred. I cleaned the battery terminals and posts and got the battery tested. Everything is good. So no battery issues. To get the electrical back up in the car I have to disconnect the battery and connect it again. Then the cycle repeats. Anybody have any ideas what this could be?

The battery.

But seriously Get a volt meter find out where you have a bad connection/losing voltage(or have voltage if you are checking ground connections). Start at the battery then work you way down the system. Without knowing where you have or do not have voltage in the system it is all just a guess.

Maybe has something to do with it ?

You didn't mention your remote start system. Disconnect all of that jazz and then start tracing stuff if needed.

@Ultramaroon , does a 2013 FRS have a remote start system?

OP, did you have the battery "load" tested?

Is that the original battery?

When you went through the car wash, was it the kind/feature that sprays water underneath the car?

:iono:

I doubt it's his battery. Sounds more like a corroded ground strap, OP just has to suck it up and troubleshoot point to point. Either that or fix it your way.

@humfrz The remote start was an aftermarket addition btw.

Hey so when I had it tested I went to Advance Auto Parts and they hooked it up to their battery tester. Not sure what all it looks for but I assume it had to have applied some load onto it to get diagnostics back.

This is not the original battery.

And when I went through the carwash it did do the underbody wash as well

@Ultramaroon Yea I'm probably gonna go the tracing route just to eliminate any other possibilities.

Update: I went out to see if the car would start this morning and it fired right up. Let it sit for a bit and turned it off to see if it would start again. Then it went back to the same thing with the power cutting off. From this I'm definitely getting suspicious of some grounding issues

I am back suspicious of the battery. Those quick testers do not tell you much.