North American Turbocoupe Organization



New Member Head Light & Fog Lights Question
Kuch Offline
Senior Member
#11
My story with my ignition switch going bad was on my old 87 TC I used to drive back around 99-00. I used to drive around Brooklyn, Staten Island, and NJ a lot back then, I was driving along the BQE in Brooklyn one evening typical heavy traffic when all of my dash warning lights turn on, along with the hard brake pedal and all. A little nerve wracking for sure, to get it to work again on mine I had to do a turn off ignition switch and back on quick to get it to catch. Everything would be good, for a while, then same issue. I drove it like that for about 2 weeks till I got a new switch.
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof,  T3/T4 50 trim, ported E6, 255LPH, Kirban, 3" DP dual 2.5" w Hooker Maxflows, MGW shifter, K&N, Gillis valve, RR cam, Koni's
1964 Ford Galaxie 500XL, 390 6V, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 3 Speed, slow and low
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BradM Offline
Junior Member
#12
5088Tbird-
I just went through a similar issue with my TC. If I toggled the light switch ON, it would sometimes kill the instrument lights (it even happened when going over a bump). I had to carefully press the toggle switch back towards OFF (but only move it about 1/8 inch). There is a dead spot in my headlight switch. Try playing with the On/Off toggle switch and see if you have a dead spot. The switches aren't too easy to find but eBay did have one (NOS).
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Kuch Offline
Senior Member
#13
I agree with Brad above, I would take the light switch out and give it a good cleaning with some Deoxit contact cleaner. I bet you could take it a part a little as well to check it out inside. I had intermittent power lock buttons on my 88 and a good cleaning with the above cleaner and they work good as new now.
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof,  T3/T4 50 trim, ported E6, 255LPH, Kirban, 3" DP dual 2.5" w Hooker Maxflows, MGW shifter, K&N, Gillis valve, RR cam, Koni's
1964 Ford Galaxie 500XL, 390 6V, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 3 Speed, slow and low
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anasazi4st Offline
Senior Member
#14
(02-16-2021, 09:23 PM)I Jeff K Wrote: ^^^ Yup, the Ford shop manuals are a lifesaver. I have the complete Ford (published by Helms, Inc) shop manuals  as well as the EVTMs for our 5 Fords and they explain pretty much everything in great detail, with step by step instructions for virtually every and any repair procedure.

Even better, there is an official Helms repair CD available on eBay that has ALL the manuals, and for 1988 models, so it is more up to date the 1987 manuals (you’ll need the 1988 Supplement, there were no 1988 ones produced). The price is very reasonable—under $50 last time I checked—and it is completely searchable—copy it to the hard drive of your computer, or use something like Dropbox. I usually perform a search first, note the section, and then go to the paper manuals.
Another proud dues-paying member.

1987 Turbo Coupe w/T5OD, 8.8 axle, grey smoke; most options. Got it in 1991 with 41K miles: 3 turbos, 2 heater cores, 1 T5OD full rebuild, 5 clutches, 1 head gasket, 2 Teves II ABS units, etc. later....
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Interceptor86 Offline
Junior Member
#15
Possibly a dumb question, but you don’t know until you ask.... Do ALL TCs have this head/fog light issue, or was it more so the 87 and 88s? I have an 86 TC and have not had this issue...yet! Should I plan ahead and do the relay mod stated above? Thank you for your time.
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Kuch Offline
Senior Member
#16
I believe that ALL Fords from the 80's-early 90's had the fog lights going through the light switch. I would do it, took me about 3-4 hours total to do the relay mod. I also did the headlights with relays as well.
1988 Turbo Coupe, Black/Black, 5 Speed, Moonroof,  T3/T4 50 trim, ported E6, 255LPH, Kirban, 3" DP dual 2.5" w Hooker Maxflows, MGW shifter, K&N, Gillis valve, RR cam, Koni's
1964 Ford Galaxie 500XL, 390 6V, 4 Speed, Vast and fast
1960 Ford Starliner, 292 Y Block, 3 Speed, slow and low
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Jeff K Offline
Administrator
#17
^^^^ Yup! All FOX Tbirds used the same headlight switch.

Besides headlight and fog light relays, changing all the exterior bulbs and fog lights to LED cuts the current going thru the headlight switch, for light switch an MFS by 80%.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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