I am looking to add a 40 amp 4 pole relay but I cannot find a place to connect to the battery (12V power). Has anybody connected such a relay in their gen 5 engine bay? I am aware of the bar to jump the vehicle, but I am looking for another place I can permanently tap into the 12 volt for a horn drawing 30+ amps.
It's an electronic train horn that looks to draw 31.5 amps at peak. I would like to tap into a 40 amp line and throw a 35 amp inline fuse running to the positive side of the relay and use the horn positive wire to trigger the coil. Got it all wired except the 40 amp supply. Normally I would just go to the battery, but the fact it's in the back in the hatch makes that kind of prohibitive.
