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Thread: M62b44 E30 Wiring

  1. #1
    Join Date
    Dec 2022
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    1990 E30

    M62b44 E30 Wiring

    Hello all,

    I have a 1990 BMW E30 325i that I am putting a M62B44 into. I have purchased the motor and it is out of a 1998 BMW 540i. I was wondering if anywone can inform me about some wiring. I have the 5 plug DME and it has four of the five plugs plugged in. It is missing plug #4 (X6004). Does anyone know where this plug might usually be located on the car and what it runs to? And if it is supposed to be in with the engine wiring harness?

  2. #2
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    That's the chassis side plug. It communicates with the gauge cluster and also receives info fr the chassis for things like speed signal

  3. #3
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    Quote Originally Posted by zkountz View Post
    Hello all,

    I have a 1990 BMW E30 325i that I am putting a M62B44 into. I have purchased the motor and it is out of a 1998 BMW 540i. I was wondering if anywone can inform me about some wiring. I have the 5 plug DME and it has four of the five plugs plugged in. It is missing plug #4 (X6004). Does anyone know where this plug might usually be located on the car and what it runs to? And if it is supposed to be in with the engine wiring harness?
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  4. #4
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    Quote Originally Posted by BimmerBreaker View Post
    That's the chassis side plug. It communicates with the gauge cluster and also receives info fr the chassis for things like speed signal
    So really in my application I don’t need this plug since I’m swapping into an E30? Or do I need to get that plug tuned out when I get the dme programmed?

  5. #5
    Join Date
    Dec 2022
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    Nevermind, upon further research I found out that the condor speed shop wiring harness will have the connection built into it and conver it to the e30 chassis system

  6. #6
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    Quote Originally Posted by zkountz View Post
    So really in my application I don’t need this plug since I’m swapping into an E30? Or do I need to get that plug tuned out when I get the dme programmed?
    Without that plug you'd never have a way to even start the engine, the start signal comes from the chassis, as do many other critical signals. But yes, the adapter harness provides that plug. In fact, that's pretty much the sole purpose of the conversion harness. It just takes signals from wherever they currently are on the car (like the round plug) and runs them to the correct location on the X60004.

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