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  • Fans dont turn off

    hello

    just got my car started, but as soon as I turn on the ignition switch the fans come on, engine is cold and temp for the fans is set at 180.
    Iam running a solid state msd relay for the fans and it shows that the ECU is activating the fans , the app shows the fans off.... do I have a bad ECU??

  • #2
    Bad wiring.
    If you send a ground signal to the fan trigger wires. The display will show the fans are activated.
    At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

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    • #3
      ok!! ill check the hole thing tomorrow!! thank you!

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      • #4
        hello, well its properly wired... could it be a bad ground? block not grounded? the msd relay is showing left led on, 12v in the output... iam going to install a regular relay...

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        • #5
          Originally posted by ruidos99 View Post
          hello, well its properly wired... could it be a bad ground? block not grounded? the msd relay is showing left led on, 12v in the output... iam going to install a regular relay...
          What's the difference between a MSD relay and a regular relay?

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          • #6
            Originally posted by ruidos99 View Post
            hello, well its properly wired... could it be a bad ground? block not grounded? the msd relay is showing left led on, 12v in the output... iam going to install a regular relay...
            Left LED ON = "Fault due to 12V applied directly to the output, or faulty unit."
            Link: https://documents.holley.com/frm3428...643_lowres.pdf

            For the record. I don't like any solid state relays. Their a pain to wire up, and when they do go bad, their very hard to replace.

            PS: I wired up 14 regular relays, and 1 adjustable timed delay relay today in 1 car today.....with out any diagrams. In the 80's and 90's I would wire-up around 300 relays a month. Not a single one ever went bad.

            Use:
            Bosch Relays 332209150
            At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

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            • #7
              Ok I installed 2 80amp relays and done!!! works like a champ!! thank you!!

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              • #8
                A Pic for you guys!
                Attached Files

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                • #9
                  Ok.
                  Car that I'm working on now. 20 relays total.
                  1595117331585-458167461.jpg
                  At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

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                  • #10
                    holly crap!! what’s all that!!?? looks good!

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                    • #11
                      Zapco amplifiers. The bottom boxes with the RED, BLACK wires are the +\- 40 Volt power supplies. The middle boxes are the storage supplies. The top boxes are the 100 x 2 amplifiers.

                      So.
                      Basically it's a 1969 car, with a 1980's audio system.
                      At 43,861 MPH Elon Musk now owns the fastest car in this Galaxy

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