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2G Testing electronics with ecu unplugged ?

Posted by 89dsm, Nov 8, 2019 at 8:37 PM

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  1. 89dsm

    89dsm Probationary Member

    3
    0
    Joined Mar 22, 2019
    Philadelphia, Pennsylvania
    I am about to start my car soon because I have just completed an engine swap. I bought this car as a shell and I am hesitant about the wiring. I know there are quite a few wires the previous owner has messed with so I am afraid to plug the ecu in and risk shorting anything out. Is it safe to hook the battery up with the ecu unplugged to test lights, speakers, turn signals ect.
     
  2. Bleakley

    Bleakley Proven Member

    229
    49
    Joined Jan 29, 2017
    Pittsburgh, Pennsylvania
    Yes.
    If something is blatantly unsafe or obvious —> fix that, then go from there.
     

    Street Build 742  1

    1995 Eagle Talon TSi
    fwd · automatic · 2G DSM
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  3. steve

    steve DSM Wiseman

    12,750
    534
    Joined Feb 3, 2002
    St. Charles, Illinois
    [QUOTE="89dsm, post: 153742632, member: 166579"Is it safe to hook the battery up with the ecu unplugged to test lights, speakers, turn signals, ect.[/QUOTE]

    Yes it's safe, The ECU isn't interfaced with those so you will be able to test them without it.
     

    3K  0

    1991 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  4. dwdsm

    dwdsm Proven Member

    394
    16
    Joined Apr 28, 2005
    Scenery Hill, Pennsylvania
    Some continuity tests with your multimeter on the important pins for power and ground on the ECU are a must here. After that It's not a matter of damaging anything just a matter of running. Grab one of the many ECU pinouts and get busy testing!
     

    939  0

    1997 Eagle Talon TSi AWD
    11.797 @ 118.450 · 2G DSM
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  5. 89dsm

    89dsm Probationary Member

    3
    0
    Joined Mar 22, 2019
    Philadelphia, Pennsylvania
    Thanks guys.
     

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