Just as a thought, there used to be a Ground for the 4x4 module on the NSS.
You have to be in Park or Neutral to shift into 4WD Low, so the NSS had a wire to module that is a Ground in Park or Neutral.
Even if you have a 2WD, not a 4x4, the contact would still be on the switch
If you were to run DRLs thru a relay on 30 and 87a poles, so DRLs would be on if relay is OFF.
Then power to the coil(85) and splice 86 coil side to NSS 4x4 wire.
So when trans was in Park/neutral relay would close and DRLs would be off, when in gear relay would open and DRLs would be on.