Hey guys i need alot of help on this one
Thats piece of the wiring harness was cut installing an aftermarket head unit. My buddy was installing it and cut it and later found out we need should not have done that because it actually plugs into new harness and not spline into wire. Well now the car wont start, bought a battery and i thought that was it but nope. Had another friend take a look at says well since it was cut the alarm light flashes. It will just click when i try to start it. So idk if the alarm sytem is makin it not turn on or what. The cars a 2001 mustang
gt. Some one please help me out! I am clueless!