My father had a 1968 ( all stock and never modified or ‘molested’ ) Cougar, and I found it most ‘amusing’ when I turned on one of the signal lights, at the same time as engaging the emergency flasher. Result - both sides sequenced at the same time. Does your car do this. Just a thought - not trying to hijack this thread.
When the brakes are on, brake lights work and right turn signals work as excepted. Left turn signal still blinks only the innermost light.
There are troubleshooting guides available for 67-68 and 69-73, whatever year you have. The link to the guides is in post #3 way above at the start of this thread. You can use the appropriate guide to check continuity of your turn signal switch at the wire junction under the dash next to the steering column and go from there.
Good luck.
That’s a failure mode that I’ve not seen before. It is especially odd that the emergency flashers operate the inner most rear lights - not the center rear lights.
If you send me the controller, I’ll take a look at it to see if it can be repaired. I still have a few parts from those older controllers.
Vic Yarberry
Cougars Unlimited LLC
That would be excellent, I will send you a message and get it sent over to you.
I just ordered the NPD taillight repair set from NPD as the whole set of wires was cut at some point, so those will be repaired and corrected soon enough.
WAG… I am thinking harness issue between controller and relays. Please don’t act on this. Many smarter people on this already.
Certainly could be, I’m going to send the sequencer in, then get some of the trunk wiring corrected. I have been running through the troubleshooting and haven’t noticed anything of concern yet. I was under the dash working on that wiring so that certainly could be some of the issue. Wire by wire i’ll try to narrow it down.
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Well I had Vic check my sequencer out and all it checked out good there. Now I am diving into things more and am getting even more odd results. I added a video to show what is happening. The sequencer and lights are definitely working, it just looks like the left turn signal and emergency flasher maybe has a voltage issue.
At the start of this video, I have the emergency flashers on and am getting one bright blink from the inner two lights, then then the sequencer works as it should, but the lights go dimmer closer to the brightness when the running lights are on.
The right turn signal works as it should. But the left turn signal starts with one bright blink then the sequenced lights blink in the correct order but are very dim. So overall everything seems to be blinking properly and in order, but the light brightness is definitely off.
I’m trying to make sense of the wiring diagram, but they really did a poor job of documenting things back in the day I suppose.
Edit to add, I did swap to the WCCC solid state relay for the interior and it does make the turn signals operate correctly on the dash now. Though the odd part there is the right signal has a steady repeated clicking. the left signal has the same steady clicking for the first two cycles and then changes to a slightly different rhythm from there on. Also the interior lights seem to dim ever so slightly when the emergency flashers and the left turn signal operate.
Well I think I found the source of all my issues and it was a simple one as usual. I had WCCC tower LED’s in the rear and standard autozone LED bulbs in the front. I swapped all the bulbs for the 1157 and 1157A standard bulbs, and everything seems to be back to normal operations, just not as bright as the LED’s. That said, I’ll take some time this week and try swapping each bulb individually to see if there is a possible culprit, being that a bulb or a dirty socket. Two of the WCCC tower LED’s are falling apart after only a few months, so I think I will give up on those or try to figure out how to epoxy them tighter possibly.
Hey guys,
I’ve searched through all of the forums, looked through youtube and facebook and i can’t find a solution to my problem. I’m hoping someone else has had the same issue as me.
1967 Cougar - Solid State Sequential Unit in the trunk. Solid Sate relays under the dash. WCCC tower LEDs in all lights.
All rear lights work as they should as well as the dash indicators. Both left and right signals and the hazards. My issue is with the front turn signals. When I signal left the left front signal flashes correctly. When I signal right the right front signals but the left light comes on as well but dimmer than the right. I’ve checked all through the harness and I cant find anything obvios that could be causing it. Any ideas?
Updated:
New Headlight Switch
New Turn Signal Switch
New Turn Signal Housings and pigtails
Did you purchase reproduction Mustang pigtails? As I recall they are not the same as the Cougar pigtails.
Randy Goodling
CCOA #95
No I purchased the correct ones from WCCC. Item #13822 on their website. This problem existed before purchasing these. I bought them in hopes it could potentially fix the problem.
Taichi - Could you post your final resolution of this problem, please?
Hey!
So after talking to Vic and going back and forth on troubleshooting, it actually turned out to be the bulbs. I switched to a set of Sylvania LED amber bulbs part # SYL 1157ALEDBP2 and they work perfect now. The plasma LED from WCCC was the problem. I’ve reached out to them and they have given me full refund. They said they have never seen that happen and I’ve also never heard of it. In case anyone comes across it!
I had odd issues as well with the WCCC tower bulbs. I pulled them and went to 1157’s for everything and all was well. I continued my testing by only installing the 6 LED tower bulbs in the rear and keeping the 1157’s in the front signals. Maybe that provided enough resistance, but now all lights work with the mix of LED and standard bulbs. I really only wanted the rear bulbs as the bright set for safety so I’m glad they are operational now. There definitely seems to be something happening when you combine the tower rear bulbs with LED’s everywhere else causing them to not function properly.
Good evening,
New to group so apologize in advance if these questions have previously been covered. I recently upgraded to WCCC plasma LED 1157. Beautiful as they are, however they are not working properly. I’m sure it’s something I’ve done. I used the new sequential unit (12135) along with (1) 12827. The turning lights blink in sequence once and stop. They do not repeat. Would the improper grounding of the flasher unit cause this? Or could it be that I need to replace the emergency flasher as well because those are not working now as well?
I’ve not seen this problem before, so no need to apologize!
When the turning lights stop, are they all still lit up or stay off?
Does this symptom occur every time when the turn signal lever is actuated?
Do the emergency flashers operate correctly?
This could be a turn signal switch or other wire opening up under load, a weak ground or a 12827 flasher failure.
Vic Yarberry
Cougars Unlimited LLC
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Thank you for the response and suggestions. I will first try to ground better with a loop of some sort. And the lights all illuminate in sequence once then shut off. The emergency flashers are not working as well. I will purchase another flasher once I return home from vacation. From what I can see of the product I was impressed with the brilliance and clarity over previous brake lights.
Coincidentally, I have some white LED’s that were not installed in front turn signals. Could that cause issues?
Thanks again,
DDubb
And my cougar is a 1969
Keeping the front turn signals with incandescent bulbs should be OK.
You could swap the electronic flasher into the emergency socket to see if the same thing happens with the emergency flashers.