Electrical Fault That I Can't Diagnose
The cause
I own a 2015 Peugeot 308 GT 1.6 THP and the other day I wired in a Dixie horn admittedly a bit of a rush and stupid job and I couldn't find my switch to I wired the relay to a ground next to my battery the compressor pos to relay the relay pos to the battery terminal, the compressor ground I ran into the cabin and tapped it to another wire I had coming off a screw that mounts my glovebox.
My Findings
I've got loads of codes I will attach, All my fuses and relays are fine I have a month old battery that been tested and is healthy, the start has 12.7 volt at the permanent and a healthy ground whereas the signal only has 5.6-6.3 volts, through talking through ChatGPT I replaced the BSM/Fuse Box which did not work. I've took out and tested the starter and its fine.
REG: KW65VYH
VIN: VF3L35GTHFS320967
ENGINE CODE: EP6FDTX
I'm not sure what i've done Please help