You did remove the fuse? That would stop the assembly coming out of the can.
If the bad idling symptoms appear with the ABS light off then it's 99% certain the OVP relay is OK. If you're testing it, check the voltage at the output, it will should be line voltage.
Check the wiring by looking for line voltage at the fuel computer.
I have a diagram showing the same systems for a 300E, email me thro' the forum for details.
'08 Chrysler 300CRD (MB OM 642 engine)
'95 E220 estate
'89 230TE (R.I.P.)