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Do-It-Yourself (DIY) Question & Answer Forum
Car Electrics: If there is a PD of +12V, shouldn't it trigger a relay
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<blockquote data-quote="tamrat" data-source="post: 459025" data-attributes="member: 29874"><p>Hello Guys,</p><p></p><p>I have this one questions thats been bugging me since earlier. So I was modifying my car to add DRLs that are integrated into the turn indicators. I found two wires responsible for the turn indicators at the headlight combination switch. They carried 12V at all times (when probed across body ground). But when I turn on an indicator, the respective wire's voltage drops to 0V. So I assumed that I can use a relay to keep a DRL circuit open as long as there is 12V in those wires. But when I tapped into that wire and added a relay, instead of triggering the relay, I'm just turning on the indicators. What now? How?</p></blockquote><p></p>
[QUOTE="tamrat, post: 459025, member: 29874"] Hello Guys, I have this one questions thats been bugging me since earlier. So I was modifying my car to add DRLs that are integrated into the turn indicators. I found two wires responsible for the turn indicators at the headlight combination switch. They carried 12V at all times (when probed across body ground). But when I turn on an indicator, the respective wire's voltage drops to 0V. So I assumed that I can use a relay to keep a DRL circuit open as long as there is 12V in those wires. But when I tapped into that wire and added a relay, instead of triggering the relay, I'm just turning on the indicators. What now? How? [/QUOTE]
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Car Electrics: If there is a PD of +12V, shouldn't it trigger a relay
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