92 conti electrical problem

I bought this car after it was sitting in a field for 3 years. A battery, fresh gas, and a brake line needed to be replaced, all done. So I start fiddling with the lights, turn signals, wipers, radio, ect. I turn on the lights, everything seems to be ok. high beams ok. Radio, wipers, HVAC blower system all OK. I hit the RH directional, The white corner light comes on but no blinker (nothing on the dash either) I hit the LH and I have a blinker (breifly) I hit the hazards, nothing. I hit the brakes, the center light comes on but not the main brake lights. So I figure either either its a few bulbs out, a fuse, or the blinker relay. I put all new bulbs in F & R, checked the fuses (all look good) and changed the blinker relay box under the dash. So far total cost is about $25 not a big deal. Now I have no blinkers (but the corner lights come on)no hazards, and only the center brake light. I would love to get this baby out on the road but New York State (and all the others) says all the lights have to workany ideas? Im thinking a bad ground now but I donno where to start

 

Do you know how to confirm good Power and GROUND to each, using a test light? I've had some over the years that we had to emery cloth/sandpaper, the inside of the sockets to get good contact for proper ground, especially if they've been sitting that long. Hopefully mice haven't got to it.

 

the marker lights all work but when i test the blinker/brake curcut theres no signal. Ive been through the car pretty well and im confident that mice have not gotten to it

 

When you say you changed blinker relay box, did you double check for an ordinary round style flasher also? Some/most vehicles incorporate one flasher for hazards & one for signals.

 

Im pretty sure that this model doesnt use the round blinker relay in the fuse box..as its completely missing..Ill look in the back to see if theres wires going to it thu...