Connectors often have wires going to and from.

If you replace a connector I'd copy the wiring as it was.

LTG : )

Pics would definitely help with this question.

When you rebuild connectors like that, there are two ways to do it. You use Molex style housings and connectors for either method.

If the wires are small, like 22 gauge, you can cut the wires away from the old connector (one at a time), strip the two ends of the wire, then crimp both stripped ends into a single edge connector designed for thicker 18 gauge wire.

The other option is to crimp an edge connector on to a short piece of wire, then solder (and shrinkwrap) the other two wires to the uncrimped end of the short wire. If a single wire loops back into the same connector, you can use two short wires to each pin, then solder those two wires to the original single incoming wire.

IDC works great in a manufacturing environment, but Molex is the way to go when rebuilding connectors. You can get the crimper, edge connectors and housings at Marco, Pinball Life or Great Plains Electronics.

Pictures are a must if you want more accurate assistance.

IDC sucks, those connectors have given me more grief.

If they are working, leave them be but if you suspect connector issues don't hesitate to throw them in the trash and go molex.

If you replace both the connector housing and the header pins on the board, IDC connectors should last a lifetime in home use. If you are routing the machine, go with crimp and stuff (Molex style).
Terry.