It depends on which red light. If it is the hard drive light, then you shouldn't interrupt it unless the computer is hung.
Disconnect the red terminal on battery and let it sit for 15-30 minutes, reconnect the battery and check engine light should be off because the computer has been reset.
If your armed you should have a RED light!
The light on a mouse does not have to be red. Some computer mice have blue lights, it just depends on which colour light the manufacturer chooses.
it doesn't let light through
If I recall correctly that is the light that is next to your oil pressure, it is more than likely comming on due to too low of pressure(low on oil or out) or your oil pressure is too high. Watch that gauge, it should move when you start driving and drop some when you let off the gas. If the gauge is working correctly and you have the correct amount of oil in the motor, then that light could be a glitch in the computer. If that is the case you can should be able to dissconnect the neg battery cable and let it sit over night. That usually resets the computer. Not always tho.
The red light should blink for three minutes, then turn off for three minutes. Then it should repeat the cycle. That is how you know it is working. If the red light stops blinking completely then the unit needs to be replaced.
Congratulations! You have a virus. (:
Green light + red light in red, green, blue context makes yellow; in red, yellow, blue context, it makes white. RGB is used for computer screens, and RYB for reflected light such as from paintings.
RED do not try green it will not turn out as well
If you use blue light in the day and red light at night it should grow twice as fast but, I would use red.
Let me guess......RED!
The red light is the sign to come to a complete stop. That's what a red light means. Come to a complete stop!!