Auto dim/comp/temp wiring
Hi everyone, new to the forum and to the Ford Ranger. I'm installing an auto dim mirror with the compass and temp gauge and need help with the 12v keyed power wire. Can I tap into the radio wiring harness 12v ignition/acc wire? Will that not drain the battery? I've done some searching and read that tapping into the dome light would cause the battery to die. Some how to's I've read are a bit confusing because they includes headlight mods with the wiring. Would this be ok, or is there a better place to wire it to?
Thanks for everything. This forum has helped me a lot.