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Turn On Flashing LED When Ignition Off

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Member - Posts: 5
Member spacespace
Joined: February†08, 2020
Location: Arizona, United States
Posted: March†11, 2020 at 8:54 AM / IP Logged Link to Post Post Reply Quote luckyleefpv
Ladies and gentlemen,
Iím so sorry but please again donít destroy me on this new topic. So here is what I would like to preform. Iím have a flashing led that is a two wire + & - input. I removed this passcode thingy from my Easyguard Alarm, PKE, and Push to Start. So now I want to give this led either a ground or +12vDC when the Ignition 1 no longer has +12vDC. Basically when the truck or ignition switch is turned off. Then this led will flash. I donít know what else is given +12vDC when the turn is turned off. Any ideas or suggestions are more than welcome.
Thank you in advance especially if this is super easy and Iím just having a brain fart.
Thank you for all who gave any help to me!
Platinum - Posts: 3,668
Platinum spaceThis member consistently provides reliable informationspace
Joined: October†27, 2003
Posted: March†11, 2020 at 3:56 PM / IP Logged Link to Post Post Reply Quote geepherder
Connect the positive lead to a fused constant 12 volt source. Connect the negative lead to the ignition wire. When the ignition wire loses power and rests at ground, your LED should flash.
One drawback to connecting it this way is that your LED will flash when your key in the accessory position. If you don't want this to occur, you can use two diodes. Connect the striped (negative) side of one of your diodes to the ignition wire. Connect the striped side of your other diode to the accessory wire. The other end of your diodes both get connected to the negative side of your LED.
Another alternative would be only connecting the negative side of your LED to the accessory wire. Depending upon how long your car cranks before starting (and the flashing speed of your LED), you may notice it flash during cranking when the accessories lose power.
My ex once told me I have a perfect face for radio.

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