I was just going to post that I thought I spotted a blue wire in the blank spot. Good catch!
So I just realized that my original 70 sequencer is turning all three bulbs on with very little delay from one to the next. It looks like all three bulbs light at the same time until you look real closely to see a very slight delay from one to two bulbs lit. Switch and flasher unit are good. Original wiring is in great shape.
I am thinking that since all three bulbs turn on, the sequencer transistors are working. Probably the caps that slowly charge to delay sequencing are bad. I have worked on pc boards and replaced electronic components my whole life, but is it even possible to service these old solid state sequencers?
Iāve not heard of that problem before I will be following to see what this becomes.
When I opened the sequencer module, I found it has the Cougars Unlimited replacement module C9WY-13A366-AR-124 dated 2003. I will appreciate any help I can get on this.
Red connector was not fully seated. When I reinstalled, turn signals work perfectly. I love problems that fix themselves! Clever little pc board, Vic!
I have a 68 thunderbird, but you folks seem to be the most knowledgeable around about this turn signal system. I have upgraded the sequencer in the trunk to the solid state unit.
No brake lights, no turn signals, no hazards whatsoever. Everything on the dash is still illuminating, though, and I have front turn signals.
I donāt think Iāve seen a problem similar to this in searching through this threadā¦ any help is appreciated.
My Fellow Americans and anyone else thatās reading this,
I followed CoachJackās write up and read all of the extra links from the other reference points in his article. It was intimidating to say the least. All my other electrical escapades have turned out badly. It took a little bit but I got it. I am so thrilled.
Ironically, I tested each of the circuits on the old switch with the ohm meter and everything had good resistance. None of the wires were burnt but there was a slight amount of corrosion on the blue wire at the flasher part of the switch. I wouldnāt have caught that if I didnāt study the pictures in his write up.
Thanks Team.
Hi Vic,
Iām looking for some insight into frustrating problem. My right signal (front and rear) suddenly stopped working. Lights, brake lights, and hazards still function. This led me to replace the turn signal switch. Now, the right signals work, but not the left; lights, brakes, and hazards still function. Thanks for any thoughts you may have.
Jon
Sorry, forgot some specs! 1968 Cougar. Original sequential motor. Using LED plasma bulbs. Thanks!
If just the left side is out, check for 12V power in the trunk on the orange/green wire of the 4-flat plug and the white wire on the white plug. Both must have power for the left side to work.
1970 Electric Mind-melter with turn signals. Ack!
Iāve had the car since 1991, and did a conversion of the sequential blinker box in the trunk way back then. A little while ago, my super cool sequential turn signals turned into much less cool intermittent sequential turn signals. Sometimes they would work, sometimes they didnāt, it was a roll of the dice. Both the turn signal and flasher can have been converted to electrical boxes (Thanks Don!) but when I turned the blinkers on, the new box would ābuzzā rather than click, almost sounds like a scratching noise, other times I would have no signals at all. Based on reading, I went and paid Don another visit a couple of days ago and replaced the turn signal switch - no luck, same problem. ! have constant 12v at the turn signal can (steady state unit) which surprised me - I thought the current ran from the column to the can, but the can is getting 12v when the key is on at all times so I guess my assumption has the current running backwards. it flows from the can to the turn signal switch, correct? Reading the trouble shooting guide it seems to read like curent flows from switch to can to sequencing box, in which case my can should only get 12v when a blinker is on not when the power is on. Iām a bit confused. Back at the sequential box in the trunk I get voltage for brake lights and flashers, nothing for turn signals. Somewhere between the 12V at the blinker can and the sequential box, I have an issue. Iāve tried replacing fuses and the turn signal switch. I also read āCheck the switch according to Table 1ā in the troubleshooting guide. Where is table 1? Iām stumped, and I am not excited about continuing to chase the problem by purchasing more parts that donāt help. Any suggestions team? Thank you!
Turn signal power flows from the fuse panel to the flasher can (red 296 to orange/yellow 8), then through the turn signal switch (blue 44), and then to the sequential controller (and inner lights, orange/blue 445, green/orange 442) in the trunk. The controller sends power to the outer two lights.
Table 1 is located further down the page in the section entitled:
No brake lights on Right or Left side:
It shows wires that are connected together in the specified turn signal switch position.
Generally, if a flasher ābuzzesā, it indicates a short (or high load) has occurred. This drops the input voltage too low to operate, so it shuts off, but then the voltage rises again, and it turns on. But because of the short (to ground), it drops the input voltage low and the cycle repeats itself - rapidly turning on/off, causing the buzzing noise.
A short or high load can be caused by a shorted bulb socket, a wire that has the insulation pinched or rubbed through (or mouse eaten), or an incorrect bulb (6V, or 1156 instead of a 1157).
Start by testing with the sequential controller unplugged to see if that improves anything. This should operate only the innermost lights and the fronts.
Will do, thank you!
1968 xr7. Just purchased the solid state sequential unit. Plugged it in a only the emergency flashers work. THe brake lights/tail lights do also work. I did have the old sequential system and only the center and front lights were flashing so i suspected the emergency relay and opted for the solid state. Could this be a turn signal switch issue? Thanks
Hereās a weird one. 70 Cougar all original light system except turn switch replaced maybe 5 years ago. All work fine, except right turn only lights up inner bulbs with no sequencing/blinking. But right turn works correctly if brake on.
Hazards work, left turn works, brake works. Checked continuity of appropriate wires at under dash connector using āTable 1ā from guide. And no obvious problems in switch itself under steering wheel.
Any ideas? Thanks!
Update: itās fixed, sort of.
After checking multiple things, I tried it with the engine running (all prior tests were just using the battery). With alternator running, and thus higher system voltage, everything works correctly. Since I only use the turn signals when driving, this should be fine.
But still weird. Some minor corrosion somewhere perhaps, causing a small voltage drop, but I couldnāt find any.
I have an odd issue that just popped up with my turn signals. I think the issue is with the sequencer, but am unsure. All bulbs are LEDās from WCCC. All of this was working fine a few months back, I was under the dash swapping the brakes to manual and now I have some issues, though Iām not sure if they are related. The sequencer in the car is the electronic version, though its probably 20 years old at this point.
- Emergency lights flash the two inner most bulbs and no front lights. Dash indicators both flash and relay clicks.
- Right turn signal works fine front and rear, dash indicator does not flash and relay doesnāt click.
- Left turn signal flashes inner most bulb only, and front bulb does not work.
- Running lights and brake lights work correctly.
Here is a link to me running through the lights - Brake lights, Brake lights, left turn, right turn, emergency.
brazz_04: What happens when you try each turn signal with the brakes on at the same time?