check brake fluid in master cyclinder,make sure it is not low.also check emergency brake for being say 1/2 on or the emergency brake switch itself for out of adjustment.
it is out, or very dim
Check for bad grounding of light socket or the wrong light bulb
Possibly a bad alternator (the system is not charging the battery).
All bulbs will dim over time and then eventually go out. See the Sources and Related Links section below to lookup light bulb info.
The cause of the tail light burning dim when the light switch is on could be a short in the wire or an exposed portion of wire. This can sometimes cause the bulb to lack power because the power is drawn to another area.
Normally this is caused by a poor ground connection.
On some cars low brake fluid can cause it to come on. GoodluckJoe If your brakes are very worn, it will take much more fluid to depress the calipers. This will significantly lower the amount of brake fluid in the reservoir which will trigger the brake light to illuminate. This happened to me and when I put on new calipers the light didn't come on again. I had the same problem on my 1993 ES. All the rear light bulbs worked, but one was dim and the resistance was higher than the others. I replaced that bulb and that took care of the problem. No more dash light warning.
...would be dim.
rods are our or dim light and peripheral vision receptors
yes, Rods are active in Dim Light
An antonym for dim is low light
Tail Light Failure sensor has detected a bad bulb or there is a loose connection. Have someone step on brak with headlights on...see what doesn't light or is dim. If dim, tighten screws on contact wires inside bulb holder assembly.