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Well……crap. Small fire

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    Well……crap. Small fire

    After 10+ years and a good amount of work I almost burnt my car to the ground. 1987 325is that I poured a lot of work into and daily drove it for nearly 100k miles. S52 swap, rebuilt a lot (diff, brakes, suspension etc). I had a catch can mounted in the engine bay on the metal above the drivers side wheel well. One of the mounting screws popped loose allowing it to rest against the thick cables of wires that are part of the body wiring harness that runs along the drivers side part of the engine bay. One day I came out to a dead battery. I thought it was odd but nothing too crazy. I then fired it up and half my cluster wouldn’t illuminate. I went to pop the hood. The release latch wouldn’t open it. Now the problems are starting to add up in a strange way. When I opened the hood I saw it. The hood release cable was burned as was a 10” section of the body harness.

    soooooo I’m assuming the front body harness doesn’t separate from the rear at all. Body harness replacement time? Anyone have a spare for a chum in need?
    "Broke into the wrong God damn rec room, didn't ya you bastard!"

    #2
    A bad situation could have been made worse if you used a traditional fire extinguisher. Perfect motivation to pickup a clean agent fire extinguisher and keep it in your car:

    https://www.rtsauto.com/what-type-of...get-for-a-car/
    Your resource to do-it-yourself and interesting bmw and e30 stuff: www.rtsauto.com

    Your resource to tools and tips: www.rtstools.com

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      #3
      especially on a fire that had gone out hours ago...

      I'd just take the harness apart and fix it. Far less time- consuming,
      and done carefully with heat shrink tubing is, 'as good as new'.

      The overwrap that's braided nylon but opens is great for covering things like this.

      https://www.digikey.com/en/products/...5BK100/2502525

      for just one example.

      t
      body harnesses SUCK.
      now, sometimes I just mess with people. It's more entertaining that way. george graves

      Comment


        #4
        Yup, I’m going to go the repair route. I disconnected the old body harness in the engine bay all the way to the fuse box. Can anyone confirm that the harness is one piece and doesn’t disconnect from the fuse box? It doesn’t look like it does on realoem. The good news is the body harness the bay that was damaged doesn’t have any sensors so I won’t run into ohm issues with a repair. It’s mostly lighting. I plan on soldering with a butt connector on either end of the solder joint (I’ve read solder can crack and I have delrin mounts. I’ll then heat shrink and then cover with high temp wrap followed by a plastic split loom. I’m going to the junkyard to cut out the body harness tomm (fingers crossed it’s intact). This will allow me to do one joint vs two, and keep wire colors a continuous color. I’ll update with before and after pictures.
        "Broke into the wrong God damn rec room, didn't ya you bastard!"

        Comment


          #5
          Originally posted by noid View Post
          A bad situation could have been made worse if you used a traditional fire extinguisher. Perfect motivation to pickup a clean agent fire extinguisher and keep it in your car:

          https://www.rtsauto.com/what-type-of...get-for-a-car/
          That's good info! I just have a standard extinguisher I keep in the trunk but I think it's time for an upgrade.
          sigpic84 325e

          Comment


            #6
            A tightly wrapped wire splice that's soldered and then heat- shrunk won't crack unless you flex it repeatedly, like in a door harness.
            The best practice is to get the copper- to- copper surface area tight, and then the solder simply cements the copper into place.

            Good quality crimps that are closed with a good quality crimper (not squeezed, but wrapped and closed)
            over clean shiny wire and then heat shrunk will be equally good.

            Stripping is important- don't knick the strands, as that can weaken the joint significantly. (I'm guilty of this)

            The harness is an integral part of the fuse box- if you open the back of the box, it just spiders out into the loom.

            t
            now, sometimes I just mess with people. It's more entertaining that way. george graves

            Comment


              #7
              I scored a harness and fuse box from an 87. I removed everything and cut the wires from the donor car that lead into the interior at the firewall. Now I just need to label everything and remove unneeded wires (ABS, A/C etc)
              "Broke into the wrong God damn rec room, didn't ya you bastard!"

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