as far as i've found out, in the 99 imp L, the grey plug is the fog, the brown plug is the cruise.
i still need to find out if the 99 impL is pre-wired. there is an open T plug behind the DS headlight, but i don't know what it's for. according to the subie 'stealer', there is a harness that's part of the "fog light assy" from the DS headlight down to the fog lights. i haven't been able to find in online or from any salvage places i've called. there isn't a separate part # for the one harness. there is only one part# for the whole damn assy (according to the part guy) which is around $400. that includes everything from the lights, harness, switch, etc. anyone with any info would be most helpful. thanks