Cruise control light/ speed light

[chairpa]

When I am driving at 70 mph my cruise control light blinks almost like it's a speed warning light Can this be turned off

[Gobird]

Sorry, never heard of this before

[007Cruiser]

That’s some sort of malfunction.

[BLACK BEAUTY]

Frank does the cruise control work?

[chairpa]

Yes cruise works perfect.
if I go above 70 cruise light blinks and as soon as I go
69 or lower it goes out.
Almost seems like a speed warning light.

[2Redbirds57/02]

Frank, do you feel a vibration when the light is flashing? Like maybe a wheel out of balance.

[chairpa]

I do feel like there is a tire out of balance but don't remember if it was at that speed.
interesting thought, how do you think that would effect light blinking.

[steelblue5505]

Cruise control is given speed data by way of the wheel sensors providing revolution numbers to the Power train Control Module & the ABS control module. The blinking light could be a sign that a wheel sensor is not functioning as it should.
There could be a fault code registered if you check the diagnostic s with a code reader.
It would be well worth the time to have checked.

[chairpa]

i have used a fix-id to see if there was any codes (none).
what should be next step, tires rebalanced, new sensors(are they in wheel)

Thanks Frank

[007Cruiser]

Here are some possibilities from a Ford Expedition forum. I think it’s electrical in some way but a good balance couldn’t hurt as you are feeling a vibration.

https://www.expeditionforum.com/thre...-please.36901/

[chairpa]

Update on cruise control light blinking.

Had had the tires high-speed balance and the lights still comes on at 70 mph and I am still feeling a vibration.

My next thought is to put new tires on the car since these were on the car when I purchased it this year.

If it is a speed warning sensor where are they located and how do you find out which one is bad

Any additional thoughts or help would be appreciated

[steelblue5505]

Frank, trying to get a better understanding of what is occurring. Cruise control works correctly. You can set it & it will maintain the selected speed? Doesn't drift up or down by 2-5 mph?
How about if you 1st bring car up to 75 then set the cruise control to that speed, does indicator light blink? If it does not blink what happens if you bring the speed back down to 70 using the button not the brake?
What happens at speeds between 65-70?
What is the speedometer needle doing when the cruise light is blinking, steady or jumpy?

The 2002-05 Thunderbird doesn't have a visual or audio alarm for exceeding a preset speed.

I can post illustrations from the shop manual to show you the position of the wheel speed sensors, but really do not think they are the cause of what is occurring especially if you only see this at exactly 70 mph. I would think if this is caused by speed induced vibration that the blinking light would occur sooner than 70 & not stop blinking at greater speeds.

[chairpa]

Here is 2 videos which i feel describes best of what's going on. one with cruise and one without cruise

https://youtu.be/THnMN-kSZb4

https://youtu.be/R9MObS4ZdqE