I just bought a bunch of 12V relays for some, auto-related uses (alarms, horns, etc.). Well, I need to know the wiring diagram, or more simply what wire goes with what.
For instance, I want to add a new horn relay, using a switch, when grounded, will activate the main, fused 12V lead from the battery to supply 12V to the horns.
I also want to do a similar thing to my alarm's horn output to use the alarm's siren and the car's factory horns. The prinicple was the same: when a switched lead is grounded, it would energize or connect the main battery12V source to the car's horns. Previouly I bought some cheap auto-parts store 15-amp horn relay, which worked as i intended it to for awhile. It still does, but now doesn't supply enough current for the car's four-note horn system; only two will sound.
Which colored wire corresponds to what I want to do?