i have a '84 Trans Am that is torn down to just the shell and i'm now trying to put it back together. i have a few things behind the dash that i'm not sure what they are or what they do. hopefully someone here can help. both of the following parts are hanging under the dash on the passenger side. one looks like a relay maybe?? not sure what the other connection goes to. also i have two complete dash harnesses. there's this plate that the diagnostic port is connected to and on the back of it there's all these relay looking things. on one harness this plate has a large black relay? on it and the other one does not. anyone know what this thing is and what it does?? it's the black thing behind the green and white things (sorry i don't know what these are called). any help would be greatly appreciated. thanks.

The first pic shows a Power Antenna Relay.....

The second pic appears to be the power to your Heater/AC controller..... ( should be run behind dash so it pokes out inside the center console. )

The black "relay" in the third pic looks like the audio chime. (the one that reminds you when you forget to turn your headlights off after shutting the car down.....)

Hope it helps !

awesome! thanks so much for the information.

anyone know where the power antenna relay should be mounted??

from the hole on the relay housing, pretty much anywere that pleases you. then mount screw the ground on a nice clean bare metal surface (ground).

can anybody help me out with my wiring issue? check my thread called (Just rebult engine. Loose wires.)Just rebult engine. Loose wires.