North American Turbocoupe Organization

well the other night i turned my brights on for a little while,i went to switch them back to normal and poof no lights at all.only my brights work....i took apart the steering collum just to see if the swich was stuck or something,,,,what would cause this? how do i fix it?......

my car is my favorite game....

SteveX82 Offline
Posting Freak
I've never heard of this happening to two bulbs at once, but it's possible for a bulb to burn out just enough that it won't burn under normal currents, but will respond when you flip on the brights. Try checking the bulbs or swapping in some new bulbs (they're cheap enough to do anyways) and see if that clears up the problem.

maroon 1987 TC 5spd

gillis valve set at 18lbs, k&n cone on VAM, removed A/C belt, unbolted exhaust at track,
best 1/4 mile: 15.10 @ 89.25mph

NEW UPDATE: car is fixed and better than ever. New mods include mildly ported TB and exhaust manifold, removed a/c system (free mod, but still), kirban adjustable fpr (at whatever the stock setting is now, but changing once i get a fuel pressure guage), and a spare ihi turbo i had laying around. 14 second 1/4 mile times, here i come
Estoril blue 1987 TC 5spd, 148k mi, a237, Bailey BOV, spec stg3 clutch, spearco FMIC, 50 trim t3/t4, 3" exhaust, Bamafuel, LM1, 55pph
Best 1/4 mile: 12.31 @ 110mph on 25psi

Liquid_force Offline
Senior Member
I'm having the same problem. If I screw with the switch a little I can get them to work, but they'll still go off from time to time, which as you can relate to, I'm sure, is a little frustrating when you're doing 70 at night. My guess would be that the switch has just gone bad. A couple people have posted the same problems you're having and replacing the bright/dim/blinker switch did the trick. I'm trying to locate one myself.
88 TC -- Dark Blue 283k
RIP - 9/22/07
She was a great TC and went down swinging Smile
Now -- Me: A minivan, I'll spare you the details.
Her: '09 VW Tiguan AWD 2.0T 101k

Mr. Sam Ford Offline
Senior Member
For some reason this problem seems somewhat common with TCs. I had something very similar happen to mine last year. Only the brights would work sometimes, and the next day the lows would work again. The problem turned out to be the high/low (or flash to pass) stalk on the steering column. On a hunch I grabbed one at a junkyard and swapped it into my TC and never had the problem after that. The high/low switch would definately be my first guess.

'88 Thunderbird TC
ATR 3" cat back, Sac. Mustang 3" DP, Tiny Avenger boost controller, K&N cone in fenderwell, Walbro 255 lph fuel pump, Perf. Techniques T03/T04E turbo, KB Trac Kit, 4 cyl. Mustang springs
'86 Mustang GT
usual bolt on stuff
'88 Thunderbird TC A4LD

[This message has been edited by Mr. Sam Ford (edited 11-01-2001).]
'88 Thunderbird TC, daily headache with a few mods, 14.65 and still not happy Smile

'86 Mustang GT, daily transport, fresh 302, Twisted Wedge heads, Track Heat intake, custom cam, all the associated goodies, 4.10s, hoping for mid 12s n/a

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