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    honda_kid88's Avatar
    honda_kid88 Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Dec 27, 2006, 06:13 PM
    91 civic mainrelay buzzing
    Hi I have a 91 civic and I have replaced the main relay the dristrubitor and all its componits including the plug wires and plugs and I got another ecu out of the salvage yard and my ? Is why would the main relay buzz when the ignition is on or when trying to start the car any advise on the situation would be apriciated thanks.:confused:
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Dec 27, 2006, 06:27 PM
    It will buzz if the ECM is bad. The ECM controls main relay terminal 8, which is a computer controlled grounding terminal. Run the K-Test on your ECM, which is described in Section A below:

    https://www.askmehelpdesk.com/cars-t...ics-46563.html
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