North American Turbocoupe Organization



My headlights flicker and I hear a tic sound
BigEagle Pete Offline
Junior Member
#1
Hey fellas n ladies, need a little help with my 87 T.C. MY LIGHTS TURN ON AND OFF A D I HEAR A TIC NOISE EVEYTIME IT HAPPENS. ANY HELP WOULD BE APPRECIATED
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Jeff K Offline
Administrator
#2
I assume the on/off flicker occurs with a definate period and not randomly? I also assume that you dont have aftermarket higher wattage headlight bulbs? Likely the circuit breaker inside the light switch is failing.

3 possibilities possibilities to fix the issue: The easiest is to install LED replacements for the current 9004 bulbs. As LEDs only draw maybe 25% as much current as the 9004 bulbs, the problem will go away. Or get a new light switch (very difficult or impossible to find new, plus big $$$$). Used switches may have the same issue yours does.

The other option is to put the headlights on relays so the light switch only needs to supply the 150 mA to the relay(s), and the relay(s) handle the full current for the bulbs. This will also produce somewhat more light output from the standard 9004 bulbs.
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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BradM Offline
Member
#3
Headlight switches are available, new and used. Here's the same part/part number I bought for my TC. https://www.ebay.com/itm/165240373795?ha...SwFzRhqpqX
1965 Mercury Comet Caliente; 1968 Mercury Monterey; 1969 F100 Ranger; 1987 Thunderbird Turbo Coupe
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Cleven Offline
Junior Member
#4
Mine was acting crazy somewhat like yours. I replaced the headlight switch and harness with a used one off ebay for like $10
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