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    #1

    Headlights Sometimes Will Not Turn Off

    Hello Everyone,

    When I switch off the headlights on my '03 Grand Marq the headlights will sometimes stay on. This doesn't happen every time but often enough.

    If I play with the switch a little, I can shut them down.


    Does this sound like a dreaded LCM issue, or perhaps a worn headlight switch? Thank you for any input.



    Jim
    Tags: None
    #2
    yeah, most likely the LCM.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

    Originally posted by gadget73
    ... and it should all work like magic and unicorns and stuff.

    Originally posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

    Comment

      #3
      Originally posted by sly View Post
      yeah, most likely the LCM.
      Well Sly,

      That was fast. Thanks very much.


      JFR

      Comment

        #4
        sometimes you get lucky and someone is on soon after you post. sometimes not so much.

        in this case, it's typically the headlight relay sticking in the LCM. Replacing the relay with a standard relay may be an option if you have decent soldering skills and don't mind modifying the LCM casing to clear the harness.

        Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
        rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

        Originally posted by gadget73
        ... and it should all work like magic and unicorns and stuff.

        Originally posted by dmccaig
        Overhead, some poor bastards are flying in airplanes.

        Comment

          #5
          Originally posted by sly View Post
          sometimes you get lucky and someone is on soon after you post. sometimes not so much.

          in this case, it's typically the headlight relay sticking in the LCM. Replacing the relay with a standard relay may be an option if you have decent soldering skills and don't mind modifying the LCM casing to clear the harness.
          I don't mind dusting off my soldering skills, and giving this a shot. I suppose the worst case is lunching the LCM and buying a new one. Either way, I have to make it right. The cost of the unit, however, sounds a little out of line. From what I've been reading they run several hundred dollars.

          Like you said: decent soldering skills.

          Thank you,


          JFR

          Comment

            #6
            There is a guy on CVN and the Maurader forums that will do the the external relay fix for you. I think he charges like $50 or something like that. If you search on those sites you will find him. User name is something like fastmerc, or fastblackmerc.
            2020 Volvo XC90 T6 Momentum (Ice White / Blonde)
            2022 Ram 1500 4x4 5.7 Etorque, Built to Serve Edition, (Granite Crystal / Black)
            Past Panthers
            1989 Grand Marquis LS (Cabernet/Grey), 1989 Lincoln Town Car SS (White/Blue), 2004 Mercury Grand Marquis Ultimate (White/Black)

            Originally posted by Lincolnmania
            if its got tits or tires it's bound to give you trouble

            Comment

              #7
              fastblackmerc does good work. I have had his repair for 2 years now.
              '91 LTD Country Squire LX | '82 Cougar GS wagon |'03 Marauder | ' 18 Flex Limited EB
              formerly: '02 MGM, '04 MGM, '04 MGM v2.0, '04 MM, '07 P71 w/5-speed, '03 SAP P71, '04 CVLX (now in pantera77's stable), '10 P7B

              Comment

                #8
                the hardest part is desoldering the old one.. but a good solder sucker will get that job done... then it's just shoving out the old and wiring in the new. There's a write-up I've linked to in the past... I'll go find it.

                here it is:
                Lighting Control Module - GrandMarq.NET - Panther Headquarters
                http://www.grandmarq.net/vb/showthread.php?40869-Lighting-Control-Module
                Everything to do with interior and body electrical including headlights and tail lights. AC/heating.


                The P71interceptor link is dead though. The rest are golden.

                and for the relays and harnesses... http://www.amazon.com/Pack-Relay-Har.../ref=pd_cp_e_2

                it's worth it just for the harnesses, but you get relays too.
                Last edited by sly; 11-01-2013, 10:27 PM.

                Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
                rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

                Originally posted by gadget73
                ... and it should all work like magic and unicorns and stuff.

                Originally posted by dmccaig
                Overhead, some poor bastards are flying in airplanes.

                Comment

                  #9
                  This is really good information. Thank you all for your time and effort.



                  Jim

                  Comment

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