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<blockquote data-quote="pbMaxLax44" data-source="post: 7682962" data-attributes="member: 623145">I know this is probably a stupid question but I have no idea what to look for on google since I don&#039;t know the correct term is for everything electrical wise. I know the very basics but have never had to deal with anything besides 12v power, matching colors, and grounding. So, is there a component I can put in a wire that will only allow the electricity (12v obviously) to flow in one direction?The reason I want to do this is because I put in a few under-dash lights that I supplied power to through the headlights so they come on whenever the headlights are on. I also would like (if possible) for them to come on whenever the dome light comes on. However, I know that if I were to do this it would also make a connection causing the headlights to come on when the dome light is on and vise-versa.Or if this question has nothing to do with the way this should be done, any suggestions?</blockquote>

[QUOTE="pbMaxLax44, post: 7682962, member: 623145"] I know this is probably a stupid question but I have no idea what to look for on google since I don't know the correct term is for everything electrical wise. I know the very basics but have never had to deal with anything besides 12v power, matching colors, and grounding. So, is there a component I can put in a wire that will only allow the electricity (12v obviously) to flow in one direction? The reason I want to do this is because I put in a few under-dash lights that I supplied power to through the headlights so they come on whenever the headlights are on. I also would like (if possible) for them to come on whenever the dome light comes on. However, I know that if I were to do this it would also make a connection causing the headlights to come on when the dome light is on and vise-versa. Or if this question has nothing to do with the way this should be done, any suggestions? [/QUOTE]

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