Electrical Gremlins

I've been helping a friend swap a carb'd 351W into his 1989 mustang. This was originally a mass air car, I got the EFI stuff as payment.... . I checked out Jason Fletchers site, which helped me solve the spark problem, but I'm now having a problem with the turn signal lights and the brake dummy lights are staying on in the instrument gauges when the headlights are turned on. I just read the website today and haven't had a chance to jumper the two connectors on the harness by the brake booster, nor did I remove the EEC power relay, could this be causing the problem? I also noticed that the parking lights stay on when the ignition is turned off, and the headlight switch is off. When I jiggled the starter solenoid they would flicker on and off.. Any ideas

I'm just wonedering why that would be the case since it never had this problem till we pulled the efi harness for the swap? As far as I knew the headlights and other schtuff was completley separate from the EEC crap. Thanks for the suggestion though, I will give it a try.