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Any fuses/relays under the hood that are only hot when the engine is on?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by azchris, Jan 2, 2012.

  1. Jan 2, 2012 at 10:58 AM
    #1
    azchris

    azchris [OP] Well-Known Member

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    Hey all :D I have a light that I'm trying to wire to be on only when the engine is on. Like the running lights, I guess. My first thought was to tap the running lights' relay, but it's inside the cab and I want to avoid running another wire through the firewall if I can.

    I don't need to draw my power from this, I already have a relay set up. I just need to find out if any of the relays or fuses in the engine bay fuse box are hot only on ignition so I can tap my relay into it. I was hoping someone here might know, before I have to get out my multimeter and check each one with the truck on and off.
     
  2. Jan 2, 2012 at 4:06 PM
    #2
    wing103

    wing103 Well-Known Member

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    there is a fuse box under the driver side, you can use "add a fuse" buy it at AutoZone. and tap the power from there.
     
  3. Jan 2, 2012 at 5:24 PM
    #3
    MrsPib

    MrsPib Well-Known Member

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    fuel pump relay is a good one to tie with. I used mine for the fog lamp mod and it won't draw power when the engine is off.
     
  4. Jan 3, 2012 at 9:43 AM
    #4
    azchris

    azchris [OP] Well-Known Member

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    Awesome! That's exactly what I needed to know. Thanks!
     
  5. Jan 3, 2012 at 10:47 AM
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    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Get a test light for future wiring. That's the best way to be sure what's hot and when. Good luck! :thumbsup:
     
  6. Jan 3, 2012 at 10:48 AM
    #6
    azchris

    azchris [OP] Well-Known Member

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    I have a multimeter, but I would have to go check each relay with the truck off, and then repeat the process with the truck on. I was being lazy and counting on someone else to know already :eek:
     
  7. Jan 3, 2012 at 1:24 PM
    #7
    dexterdog

    dexterdog My pee parts itch

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    No offense but when it comes to electrical, I always check. It's just not worth possibly frying something other than chicken.
     
  8. Jan 3, 2012 at 1:26 PM
    #8
    azchris

    azchris [OP] Well-Known Member

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    I'm in the process of getting my electrical engineering degree, so hopefully I won't fry anything :p I know which pins on the relay I need to tap, I just didn't know which relays are hot only when the engine is on. As another poster pointed out, the fuel pump is a good choice! I wired it up earlier today and it worked great. :)
     
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