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Thread: Lucas Switches

  1. #1
    Join Date
    Dec 2007
    Location
    Dover, NH
    Posts
    30

    Lucas Switches

    Well,

    This past Saturday going to a car show, my second Lucas Switch crapped out; this second time this switch failed in less than two months. I made it home short-shifting and neutral coating (fortunately down-hill); temp never went over 190F...

    Are any of you running different switches (more reliable) that would plug in to the Unique dash and wiring ends?

    I would really hate to buy replacement (Lucas) switches

    Thanks,

    Gino

  2. #2
    Join Date
    Jan 2003
    Location
    Gadsden, Al , USA.
    Posts
    1,543
    I would add a relay and stay with the Lucas switch. I haven't lost a Lucas switch yet.

    Alan

  3. #3
    Join Date
    Dec 2007
    Location
    Dover, NH
    Posts
    30
    Alan,


    What do you mean by a relay? Have any pics?

    Thanks,

    Gino

  4. #4
    Join Date
    Jan 2003
    Location
    Seattle, WA, USA.
    Posts
    1,083
    This diagram should help. It is an easy project.

    Here is a link to some relays and connectors at parts express.

    http://www.partsexpress.com/webpage....n&WebPage_ID=3

    Many parts stores will have them to but at much higher prices. The diagram shows a 14 amp fuse at he battery. That seems low to me. Check the specs for the load your running and size the for that. Most performance electric fans would use a 30A fuse.

    The diagram has two relays but you only need one. The second relay is for triggering the fan from the AC compressor which I doubt you have.

    The diode and LED at the right of the diagram allow you to have a light on the dash to show when the fan is on. This is handy with automatic switches.
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    Patrick Brown
    Forum Administrator



  5. #5
    Join Date
    Jan 2003
    Location
    Seattle, WA, USA.
    Posts
    1,083
    Here is the site whereI found the diagram. There is some good info.

    http://www.geocities.com/smithmonte/...rkVIII_Fan.htm
    Patrick Brown
    Forum Administrator



  6. #6
    Join Date
    Dec 2007
    Location
    Dover, NH
    Posts
    30
    Thanks for the info....

    just ordered some swithes and perhaps attempt to wire the relay before installing...

    thanks again,

  7. #7
    Join Date
    Dec 2004
    Location
    Prince Frederick, Maryland, USA.
    Posts
    1,561
    Relays are great.
    On headlight and fans I wired them in and kept the Lucas switches.
    I like the vintage look.

    Very easy to do.
    Tony
    Unique 427 #4279480 Precision Engine Machine Company 427 s/o 483.47 stroker close ratio toploader 3.31 jag rear

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