02 Honda Foreman Rubicon 500FA cluster flashing

I need some help with figuring out the issue at hand.
I just picked up 2 02 Honda Foreman Rubicon 500FAs. I just did a head gasket kit on one and carb clean out. Got it all together. Put a new battery in and once I turned the key, the cluster started flashing D1, D2, ESP, and hours. I haven’t tried pull starting it but the electric start doesn’t work.

I thought it might be the ECM, but I changed it with the parts quad I got and that didn’t change anything

I haven’t put any other parts into it yet, but wanted to know if there is certain parts or anything I should test.


Im stumped and at a loss. Im hoping I didn’t just blow 1800 on two junk quads.

Please help anyone.