For the love of God don't cut your factory harness.
You're talking about the black rubber connectors I suppose.
Spray the connector with some weasel **** and let it sit for a while. If you still can't pull them apart then take two pair of pliers (for leverage), grab each side of the connection and GENTLY wriggle them. Don't be ham-handed and crush them or snap off the leads.
Last edited by fastbackford351; 08-27-2013 at 12:00 PM.