Check engine light on as well as the anti-lock brake light. checked the radiator, oil level, and brake fluid. all is fine but lights still on. what could it be?

when the light is flashing do some simple checks first
check coolant level at the radiator cap
check sump oil level
if the transmission has a dip stick check fluid level
check brake oil level in the reservoir
Now have the fault codes read as the light refers to engine and transmission faults.

Brake Light. Make sure you are not driving with hand brake on. Check brake-fluid level. Top off brake fluid if low and make appointment to check brakes. Driving with brake light can be dangerous; deal with this soon. Call tow truck or drive carefully and slowly to shop.
ABS (antilock brake system) Light. Indicates either low brake-fluid level, stuck brake caliper or faulty ABS. Check brake fluid and make appointment to get brakes checked. Call tow truck or drive carefully and slowly to shop.
Oil Light. Either engine is very low on oil or there is no oil pressure. Pull over and turn off engine immediately. Check oil level and add oil if low. Turn engine back on to see if light has gone off. If oil light is still on, bad oil pump (no oil pressure) is likely. Call tow truck.
Check Engine Light. Car's computer senses engine problem. Difference in performance may not be noticeable, but make appointment to have car diagnosed. This usually cost around $65-$75 to do. OK to drive. If problem is serious, computer may switch to limp-home (low-power) mode and you won't have option of waiting to bring car into shop.
Air Bag Light. Get air bags checked. Problem could prevent them from activating in accident. OK to drive, but not safe in accident.
Battery Charge Light. Alternator is not charging. OK to drive, but turn off any unneeded electrical devices (radio, heater, defroster) and avoid starting engine more than necessary. Bring car into shop soon to avoid getting stranded. When alternator is not charging, battery loses charge and car stops working.
Emissions Lights (O2 sensor, EGR, check emissions). Depending on car model, these lights may indicate problem with emissions sensor or may light up at certain mileage, usually 60,000 miles (100,000 km). Get sensors checked. OK to drive. If problem exists, car might get poor gas mileage.
OBD Tools 365 Days Shop

When you release the parking brake (while keeping the handle pulled) reach down or use your foot and pull the parking brake pedal up . If the light goes off, the switch needs adjustment

Sounds like a brake light. Check your brake fluid and fill to the correct level if low then see if it goes out.

The Brake light says "BRAKE" is the Brake System Warning Light: "This light monitors various brake functions, including brake fluid level and parking brake application. If the brake light turns on, it may indicate that the parking brake is applied, that the brake fluid level is low, or that there is a problem with the anti-lock brake system (if equipped)."

Another is the Anti-Lock Brake System Light: "This light monitors the Anti-Lock Brake System. The light will turn on when the ignition switch is turned to the ON position and may stay on for as long as four seconds. If the ABS light remains on or turns on while driving, it indicates that the Anti-Lock portion of the brake system is not functioning and that service is required. However, the conventional brake system will continue to operate normally if the BRAKE warning light is not on."

It could also be the Tire Pressure Monitoring light. Check the brake fluid first and see if that fixes it.

Have the computer scanned if you want a quick scan have Auto Zone or the like scan it for free , they also will give you a printout of the problem code, if any, that may be stored in the computer system.
Trans. fluid is only checked on a running in park warm engine, if it is not running the fluid will read too high on the stick showing an overfilled condition, use only recommended fluid, should have the type requirements stamped on the transmision dip stick.
When filling do it slowly and add only half a quart at a time checking the level each time as to not over fill.
The trans. fluid and filter should be changed every 30,000 miles as preventive maintenance proceedures.
Hope this helps, good luck!!

CHECK ALTERNATOR OUTPUT IT SHOULD BE 13.5 TO 14.5 VOLTS WITH ENGINE RUNNING.IF VOLTAGE LOWER 12 VOLTS THAT WILL CAUSE BRAKE AND ANTI LOCK BRAKE LIGHTS TO COME ON BECAUSE THAT NOT ENOUGH POWER FOR ABS BRAKES OPERATION.IF ALTERNATOR GOOD.BRAKE AND ABS LIGHTS ON ALSO MEANS LOW BRAKE FLUID LEVEL CHECK BRAKE FLUID LEVEL.ALSO. YOU HAVING BRAKE FAILURE.YOU NEED TO HAVE GARAGE OR DEALERSHIP CHECK BRAKES SYSTEM.BEFORE BRAKES COMPLETELY FAIL.

Change front/rear axle oil
Change transfer case oil
Air filter
Engine coolant
Rotate tires
Fluid level on battery/radiator/brakes
Change oil and filter
Inspect for fluid leaks
Inspect coolant and heater hoses
Check exhaust system
Check drive belts/tires/wheels/brake lines
Check steering operation/disc brakes/brake pedal play
Check parking brake
Check and lube accelerator linkage
Check suspension/steering/power steering fluid
Lube body and chassis
Check TOD system fluid
Check cruise control linkage and hoses
Check starter safety switch
Lube key lock cylinder

I believe it's the washer fluid light

Here's a list of your dash lights and their meanings

Left
1. Door-ajar warning light
2. Oil pressure warning light
3. Check engine warning light
4. Tour or Sport for the ECS
5. Security indicator

Center Warning Lights
1st space down
Left: 4-wheel steering oil level warning light
Right: Brake warning light
2nd space down:
Left: Anti-lock brake warning light
Right: Active Exhaust Tour indicator
3rd space down
Left: cruise control indicator
Right: cruise control ON indicator
4th space down:
Left: charging system warning light
Right: High-beam indicator

Right Warning Lights
1st down: Not used
2nd down: Seatbelt warning light
3rd down: Washer fluid (2 storage containers)
4th down: Supplemental restraint system (SRS) warning light

The anti-lock light is indicating that your anti-lock brake system has a problem. Check fluid level. Could be a sensor, time for brake service etc, but I wouldn't wait too long to have it checked, just in case something serious. Anti-lock brake problems may cause a wheel or more, or all, to lock up in a panic stop situation. When was last service on brakes done?

thermostat my be stuck closed. check radiator for gunk and junk, check oil if it looks milky then its your head gasket. to reset the check engine light disconnect the neg battery terminal for 30 seconds