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Fuel pump relay '409' pin out

Discussion in 'General Technical / How To' started by mattpanton, Oct 10, 2013.

  1. mattpanton
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    mattpanton Member

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    Sep 26, 2005
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    Hi,

    Does anyone have a definitive pin out for the 409 fuel pump relay? I need to retro fit one to an 1.8T (AGU) conversion in a Lotus Elise and the pin labeling on the wiring diagram (Haynes, admittedly) is different to that on the relay?? Some I have managed to work out myself by a process of elimination but I am missing some critical ones.

    What I have so far is as follows...

    [TABLE="width: 500"]
    [TR]
    [TD]Haynes diagram
    [/TD]
    [TD]Relay pin
    [/TD]
    [TD]Function
    [/TD]
    [/TR]
    [TR]
    [TD]S3/1
    [/TD]
    [TD]9/TK
    [/TD]
    [TD]Door switch input
    [/TD]
    [/TR]
    [TR]
    [TD]S3/2
    [/TD]
    [TD]??
    [/TD]
    [TD]+12V on cranking
    [/TD]
    [/TR]
    [TR]
    [TD]S1/1
    [/TD]
    [TD]31
    [/TD]
    [TD]Earth
    [/TD]
    [/TR]
    [TR]
    [TD]S3/5
    [/TD]
    [TD]3/C
    [/TD]
    [TD]Crash input
    [/TD]
    [/TR]
    [TR]
    [TD]S3/3
    [/TD]
    [TD]??
    [/TD]
    [TD]+12V when ignition on
    [/TD]
    [/TR]
    [TR]
    [TD]502
    [/TD]
    [TD]2/30
    [/TD]
    [TD]+12V Permanent
    [/TD]
    [/TR]
    [TR]
    [TD]504
    [/TD]
    [TD]8/87
    [/TD]
    [TD]+12V feed to pump
    [/TD]
    [/TR]
    [TR]
    [TD]S3/6
    [/TD]
    [TD]??
    [/TD]
    [TD]Signal from ECU (T80/4)
    [/TD]
    [/TR]
    [/TABLE]

    Relay pins remaining are, 4/15 and 1/MOT, also I seem to have 8 pins on the diagram and only 7 on the relay????!

    Any help greatfully received! I have been trying to find the answer online all day!

    Matt
    #1

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