Headlamp and Dome delay???

I have a '92 Sport, and was reading a recent post about the under dash relays, then did a search on adding the headlamp delay relay and the dome light delay. The posts I came up with were "light" on the location and description of the relays. and a side note, years back i added a cargo area dome lamp w/ tailgate switch and the button does not function on the dome lamp like the owners manual says, and i've replaced it thinking the switch was bad... any ideas on these, any thing will help me...

any ideas, heading to the junkyard this weekend for a friend and I would like to grab the relays then...