Here is a link to the problems certain engine harnesses could have. Look it over. As Terry said earlier even though your car wouldn't be covered with this recall your harness might be a left over one used in the early 98 models, that is subject to the bad insulation on the wires. The harness under the UIM will probably be in the worse shape because it is subject to the highest heat, That harness you are moving around might be the one that goes to the CKP sensor (Crank Position Sensor) When I had my recall done the shielding on that cable was completely missing, but the car still ran, although roughly at times, idle wise.
http://www.contour.org/FAQ/recall/99M03/
Look at Figure 4, that is where the Cam and Crank sensors are.