$30 keyless entry - Easiest bang for buck project yet
Bought a generic Amazon kit, which came with inline 15amp fuses for the 12v power and lock signal, 2 hours later and I am not sweating breaking off another key in my door / trunk.
Edit: I bought this one - keyless entry link
I used the trunk wiring, someone will yell at me because I didn’t go under the drive side footwell speaker panel, but I lock my car through my trunk already and I have fuses on the module, so this can’t be worse than my current locking procedure.
Module side - E30 wiring harness
Red with 15a fuse - Antenna power wire (red)
White with 15a fuse - lock (green and black)
White and black - unlock (green and purple)
Black - ground (brown)
Yellow - ground (brown)
Yellow and black - ground (brown)