Where can I find a replacement ECM harness for my 1984 carbureted Z-28 (LG4)? Many of the sensor connections are either fried or cracked away. If I could get away with just replacing individual wires and the corresponding connectors, that would work too but I don't know squat about wiring or where to get the connectors. I've checked out Painless Wiring and it seems all they are geared toward is fuel injected harnesses.

 

Check Pep Boys--they carry the "Conduct-Tite" line of replacement connectors from Motormite.

I found a replacement radiator fan relay connector and they had lots of others as well.

To splice the new connector to the old wires, strip the wires to expose about 1/2" of metal and slip a 1" piece of heat-shrink tubing over each of the wires (get it as far away from the joint as possible so that the heat from soldering won't cause it to shrink). Then twist the wires together and solder them, making sure to apply the solder to the joint and not the iron tip. Then remove the iron and allow the solder to cool without moving the joint. The resulting joint should have a shiny layer of solder covering it..if it looks dull and grainy you didn't get it hot enough or it was moved before the solder cooled. Heat it up to remelt the solder and let it cool again, it should look better the 2nd time around.

Then slip the heat-shrink tubing over the solder joint and use a lighter or heat gun to shrink the tubing over the joint.

If you've never soldered before you might want to practice on some scrap wire. As far as the type of iron to use a 75 watt soldering gun works best. Make sure to use rosin-core solder, not the acid-core solder used for plumbing. If you get the solder from Radio Shack you're OK as rosin-core is all they sell.

 

Thanks for the response. I had imagined there must be some replacement connectors out there as everytime I have to replace a sensor the connectors end up falling apart.