i just installed a new front headlight, engine and main under dash harness. Put the battery back in to test and I'm getting absolutely nothing. Battery shows 12.5 volts. Turn the key and nothing. Purple is on S terminal. I'm getting 12.5 at the starter. I do have the dash cluster out of the car and the instrument plug is not connected. I don't think that has anything to do with it. Seems strange that the headlights won't even come on. Any ideas?

Grounds attached?

Follow red 10 AWG from firewall up to ign switch, should be a crimp pigtail going to headlamp switch from same wire.

I would look at the main power feed. It runs from a screw lug on the horn relay over to the junction block by the battery, and the lil pigtail off the battery cable should be connected there too. It's detailed with pics in the "what it is, where it is" sticky.

hi Jim - which pic?

Jim - you're unbelievable! That was it. I had forgotten to re-connect the horn relay.
One other question, now the interior lights stay on (console and the under dash) is that a ground thing?

scratch that last question - I'm an idiot.

Interior lights will stay on until you open the circuit for the door jamb switches....of course you probably figured that out judging from the idiot remark. ;)