i've noticed at the shops that the cheaper alarm systems don't
come with their own relay (they utilize the existing one), the
expensive ones do. does anyone know whether this factor is
important?
hmmm... actually the relays are used as starter kill. As long as you can get the starter kill, regardless whether expensive or cheap alarm, they are the same concept so should be okay.
I am a newbie here my car is a 4 door skyline auto converted to manual my check engine light turns on. My local workshop here does not know how too go about it as he said is the Speed Sensor Fault which...