Had the Camaro wired a year or so back with an 18 circuit painless setup. Also installed a new GM turn signal harness. Everything has been working well till today after a ride on bumpy roads. Now the left turn signal works when turned on and only the left parking light when parking lights are turned on. However the right turn signal indicator lights up when the parking lights are turned on. Right turn signal has both parking lights blinking slowly and dimly. The rear lights work properly on all settings for both sides. Tried a change of bulb and flasher with no change. A test light on the negative post of the battery lights up when touched to the housing of either park light housing. Doesnt affect problem however dont know if this is right or not. All connections at parking lights seem to be clean and good and grounds tight. Turning hazards on results in normal flashing at rear and out of sync on front. Any tips or ideas on what to check seems like something got shook loose or is grounding somewhere perhaps.

Anytime you have a rapid flash on a particular side, it means there is a bad bulb somwhere on that side. Try another bulb in the turn signal. Make sure the bulb has two contacts on the bottom. Recheck the one you remove to make sure it has two. You may have accidently installed a single filament bulb into a dual filament socket or the bulb could have been bad. I use 1157 bulbs in my 67 turn signals. I think the original number is a 10-- number, but the 1157 is brighter. Hope this helps. Let me know.

Although you say the ground to the right front lamp housing seems good, it sounds like that is the problem. The dim flashing of both lights when you turn on the right signal, and the fact that the front light is out when the flashers are on, are the giveaways.

Perhaps the light housing is grounded, but the lamp socket is not grounded properly to the housing? Did you install new turn signal housings?

I had this very same problem with my old housings. The connection between the bulb socket and the lamp housing was not providing a good ground. Check it by cleaning a spot on the outside of the bulb socket, and attaching a jumper wire from ground directly to the socket (instead of to the housing).

The out of sync flashing is the result of a bad bulb. Try another bulb or make sure you are using a dual filament bulb.

I'll agree with Damon on the grounds. A test light from the neg bat to the light housing should NOT light up. Bad ground.

My mistake, it was going from the positive side of battery to park light housings not negative side and now the passenger side wont work that way. I switched the housings from side to side and the drivers side worked perfect on the passenger side using the same ground point and the passenger side housing did not work on driver side either. So I think I have confirmed that the issue is in the passenger side housing not any electrical wiring. Im thinking that Im not getting a ground through the housing. Does the brass light socket ground to the housing? It doesnt look like I can remove the socket without damaging it and I dont know if just the socket is available so the original wiring connector can be used or if a new housing would be required. Wierd that it worked fine and just stopped working suddenly.

The socket is supposed to ground through the housing. If the ground is bad, the turn signal will try to ground back through the parking light circuit, causing both lights to dimly flash.

I don't think you can easily separate the housing from the bulb socket. I've never tried. However, it must be possible because Ricks sells the housing separately, without the socket installed.

You can get the complete housing/socket/lens from Rick's for like $50. If you don't want to spend the cash, you can try to solder a ground wire directly to the side of the bulb socket.

If you are really cheap or lazy, you can clean up the outside of the socket and use a hose clamp around the socket to strap a ground wire to the side of it. I fixed mine like this once in a pinch when it stopped working on a road trip.