jewh4

My coolant light keeps coming on, but the fluid level is full and has been full for weeks. What the hell is the problem? Any help would be appreciated!

LetThePoniesRunFree

Could be the float sensor in the brake reservoir going/gone bad. Could be a break in one/both of the 2 wires going to the sensor as it makes a real sharp bend because Ford in their infinite wisdom attached the loom for the wires against the driver fender.Unfortunately, you can not change the float sensor because it is molded into the reservoir.

hawwk11

Same thing happened to my 99' GT, and at first it would come on and off and finally it just stayed on. I heard it is just a sensor, and ford charges waaaay too much to fix it so i just left it alone. Mines has now been on for over a year, but i know how ya feel because it bugs the heck outta ya to see any light on the dash on like that. When i got my oil changed they said that sometimes debris gets stuck in there and trips the sensor, they tried to blow the sensor with an air compressor but it didnt work in my case. Just my 2 cents.

Good luck,

newb2000GT

Specifically....it's a Mustang. This is a known problem on New Edge's.

I used to get it only after car washes and it would eventually turn off after a day or so. Once igot the blower installed it stoppped doing it. Have you tried installing a blower yet?

Seriously though, I think a component of my blower install is keeping the sensor or it's connection from getting soaked in the car wash.

LetThePoniesRunFree

When standing in front of the car, on the left hand side of the master cylinder reservoir are two wiresrunning into a male plug that terminates into female plug that is molded into the plastic brake fluid reservoir. There is a constant current running through those wires while the internal reservoir float is in the up, (full), position. If the fluid in the reservoir runs low or there is a break in one of the wires running to the sensor, the dash light will come on. If the internal float has malfunctioned, it's new master cylinder time because Ford doesn't sell the reservoir separate from the master cylinder from what I could find. I may be wrong on that.

If you don't care about knowing if you have enough brake fluid or not from your dash, connect the two wires running into the float sensor in the reservoir together. That will complete the circuit and trick the computer into thinking the brake fluid level is full at all times.

I don't recommend the above modification, but it isn't going to hurt anything and as long as you keep an eye on the brake fluid level, bye bye dash light.

bransdaman78

or just pull that bulb out

lizzyfan

Car wash, that was my problem
You take yours through lately?

LetThePoniesRunFree

Just a suggestion to you guys with the car wash "syndrome". Pull the plug off of the reservoir, apply a generous helping of dielectric grease on the connectors and plug it back in.

lizzyfan

Will try!
Tanks!

roush17

My coolant light has been coming on and off periodically for about 6 months now. Keep an eye on your level constantly though because mine has started going down and it is leaking from the intake manifold. All I have to say is don't ignore it for too long.