2001 left front collision code p3100

My wife took a hit to the front left of our 2001. Other than replacing the fuse/relay box there doesn't appear to be any under hood damage. The car was running after the collision and was driven to a nearby parking lot where it was then shut off. When I got there I tried to start it but it would not turn over and the MFD shows this: This will give you an idea of the extent of the damage:

I could find no wires or electrical components that were damaged. I got all the parts I need from a running (but totalled 2003).

So my question is what should I swap out next?

Thanks for you collective wisdom

 

Oh and the 12v battery which was a brand new 500 cca eventually discharged down to 1.7v after recharging it I installed it and tried again and got the same result. I don't believe anything was left on but I can't say for sure.

 

The only code showing is p3100, and this may be because after the battery going dead other codes were erased. I have a donor vehicle, a 2003, that is, mechanically, in excellent condition that I will be using to swap out parts.

I have a volt/ohmmeter, but with out being able to start and drive the car to find out if there are any other codes, I wouldn't know where to start looking.

I just thought someone may have known a similar situation that could give me an idea of the possible causes, then I could use the old method of "R&R" until I find the culprit.

BTW I did pull the drive battery, it was my first experience in reconditioning a gen-1 battery, and, after sitting for two months without having been started, each module measured between 7.2 and 7.5 volts. So I think I can rule that out.

Thanks again for the help.

 

Sorry about that. I wish there was a mobile app for this forum

 

I can't say for sure that there was nothing left on that would have discharged the battery but I have recharged it and confirmed it to be a good battery, recharged it, reinstalled it and will recheck it in a couple of days.

 

As you can see from the pictures above I had to remove the fuse/relay box and headlight assembly after straightening the fender support. This gave me an excellent view of the wires and electrical devices and connectors in the affected area. The only thing that had any damage was the fuse/relay box and I replaced it with one that came from a 2003. There are 4 connectors on the side of the 12v converter and as you can see in the picture the brackets holding them in place were slightly moved but I couldn't see any damage to the wires or plugs.

We just moved, in fact the accident happened in the middle of the move. I had just purchased the tech stream hardware and disc before we started the move but was having difficulty getting it to work for me so I set it aside and it got packed. We still have many boxes to go through but it hasn't showed up yet.

As I've said I have every part I could possibly need on the 2003 donor car I have, so I can start going down the line R&R (ing) one part after another until I find the problem or my tech steam whichever comes first.