1994 e36 320i Coupe - Starter interlock relay Diagnose how? - Page 4

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Thread: 1994 e36 320i Coupe - Starter interlock relay Diagnose how?

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    #31
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    I'm slowly running out of idea's.

    This is a long shot, but try swapping the fuel pump relay with something else. See if that makes a difference.
     
     

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    w4vy (02-08-2011)

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    #32
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    Quote Originally Posted by Ronnie View Post
    You can short the starter motor main lead across to the solenoid plug and if it turns over every time you try it then at least you know you have a wiring issue, you can then start working back.(much easier with inlet manifold off though. )
    Do you mean the 4th post that you don't touch when changing a starter motor which has the earth strap looking thing that's coming out of the starter connected to it? If I put a jumper cable from that post to the main post with the battery wire and alternator wire connected to it the starter should spin? spin but not fire? or both? Or nothing till I flicked the ignition key and then it would spin/fire or both?

    So many questions Sorry just learning. the red wire is always live isn't it, the one at the starter coming from the boot? there's nothing in between no?

    Cheers.

    looks like I'm taking the intake manifold off again anyway. (tomorrow, 3rd time lucky maybe?)

    EDIT: Chris m8 or anyone Where does the 8mm wire go to? Is that the ignition 12v or is the ignition 12v the 10mm wire from the starter?

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    #33
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    how did you test starter motor if it was just powered on bench then that could still be the problem as it takes alot to turn an engine over so if its weak it will work of car but cant turn engine over
     
     

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    #34
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    Get a photo of how yours is wired up - I'll compare to mine.

    And in the mean time, try that fuel pump relay.
     
     

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    #35
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    Quote Originally Posted by JAJ View Post
    how did you test starter motor if it was just powered on bench then that could still be the problem as it takes alot to turn an engine over so if its weak it will work of car but cant turn engine over
    To test the starter motor I used a brand new (charged) battery, brand new jumper leads I put the Negative on the starters "ears" and the Positive on the peg the alt wire & battery wire connects to, then with another wire I bridged the connection from the positive peg to the 8mm peg first and the starter started spinning, I then bridged to the 10mm peg and this time the starter fired its pin and spun.
    (btw the starter although not new to me was bought new and was on the original car less than 2 months and the car was SORN so wasnt being driven so in effect it was hardly used before the car was took to bits and all the parts sold)

    Quote Originally Posted by Ferret View Post
    Get a photo of how yours is wired up - I'll compare to mine.

    And in the mean time, try that fuel pump relay.
    ok I'll try the fuel pump relay swap but getting a photo of the starter wiring will have to wait till I take off the intake manifold to get access again m8.
    Last edited by w4vy; 02-08-2011 at 21:45.

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    #36
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    Ok mate

    If that relay doesn't do it, then there must be another one hidden somewhere, so let me know if it doesn't work and i'll scour the wiring diagrams again in search of that relay !
     
     

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    #37
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    The main lead being the alternator cable one that is bolted to the starter(it is a permanent live), the solenoid wire is the one that gets power to it when the key is turned to the start position.
     
     

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    #38
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    Set your multimeter to read DC volts and put one lead on the thick red cable at the back of the starter and the other lead to a good earth. Do you get +12V? Are the starter connections tight?
     
     

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