Join Date: Nov 2009
Location: Lake Mathews, CA
67 headlight doors troubleshooting guide
OK, here is the definitive on troubleshooting the 67 Camaro headlight doors, not working properly ( in my case it started with not closing and moved on to more problems as I replaced each item in the circuit.
This process worked for me, I have changed the sequence of my process to make it easier for anyone else to correct, learn from my mistakes.
Make sure you have your headlights installed and the dimmer switch in and working before you start, the ground works through these items and will now work if they are not installed.
1) Replace the relays ( all 3 ) DO IT! IT IS ONLY $60 AND YOU WILL SAVE COUNTLESS HOURS! ( less $ if you can find the relays in the electronics store )
2) Replace the breaker ( this one is critical also ) Make sure you are using the 10A breaker, some knucklehead put the 30A in my system and that was causing all kinds of problems...( did not find that till the very end )
3) Verify you have 12v on the brown wire coming from the firewall to the first relay with the ignition ON and the ligth switch OFF.
troubleshoot that if you have no power ( open on the brown wire, bad light switch? )
4)Verify you have 12V on the blue wire coming from the firewall with the ignition on and the light switch on. ( if no power troubleshoot that, open blue wire, bad light switch )
5) Confirm the 12v switches wires from Blue ( with the switch out ) and Brown (with the switch in ) they should not be hot at the same time!
6) If your system is still inoperable, start with each wire in the relay board, replace them one by one, testing after each wire. ( YOU WILL NEED THE WIRING DIAGRAM THAT IS AVAILABLE FROM A NUMBER OF SOURCES FOR THE 67rs HEADLIGHTS AND DOORS )
7) Verify and replace any wire that may be damaged/missing going to each of the limit switches.
8) verify you have the grounds on the limit switches hooked up on the correct tab on the bottom if each limit switch, they are all the same so test them with a multimeter to confrim you have continuity working equally on each of the limit switches THE SAME!
8) if you recently took the system apart to clean and paint it so it is nice looking, confirm you have not eliminated any grounds ( scratch the new paint under each ground point so you are sure you have good contact. )
9) ( I did this for good measure ) Add a ground wire from the passenger side limit switch ground connection to a solid ground, I went from the screw and connector on the bottom of the switch bracket with a 14" #12 black wire directly to the batter negative. that was also a critical part to the system, that ground is crucial. Not obtrusive and you can't see it unless you are really looking, you could remove it once you have the system running properly if you are a total purist...
THAT SHOULD GET IT GOING, GOOD LUCK, ENJOY GETTING THEM WORKING ON MY 25 HOURS OF TROUBLESHOOTING :-)