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  • Relay Question

    I just finished installing my Flex a lite dual 12" fans. I currently have it hooh straight up to the battery instaed of ignition hot, but I am considering switching it. Is there any problems usiing the B+ post on the alt instead of running a whole new wire into the cab? The wire is used to trip the relay in the control box for the fans.

  • #2
    On my Jeep, the B+ is hot all the time, so yes, there would be a problem running it off that terminal.

    Try splicing into the ignition module power feed (not the coil hot). It is a big red wire near the back of the fuse box and it is switched directly from the ignition switch. Jeep used it for several accessories, so a small relay shouldn't tax it too much.
    Last edited by tracraym; 05-11-2008, 09:00 PM.


    • #3
      the way I have hooked up cooling fans is to have them pull directly from the battery power, but I run them through a seperate relay that gets triggered from the ignition switch, this way I can fuse it seperately from the fuse block, and not have a lot of extra current pull through the box.

      this is the same way that I connect all accessory off-road lighting as well.


      • #4

        That is how I wired up my lights, and how I am going to do my fans.