Anti lock brake light

[jeba]

after running awhile, the light always comes on, seems like after it warms up, doesn't have to be moving. Anti lock diagnostics show no codes. Lately stays on until it cools down. Can't find no shorts, got an anti lock solenoid relay and ECU cheap from junk yard, same problem. Running out of options here, any ideas out there. Also vehicle reguarly serviced, all fluids, etc.
90 model SR5 4WD M/T 3VZ V6.

[Naito]

If it's jsut teh ABS system and not the brake system itself, probably not worth fixing. 1990 ABS technology sucked, u'll end up stopping slower anyway. Learn how to brake properly without it instead.

[jeba]

Thanks for the reply, brakes seem fine and can't tell any difference, so I don't know if it actually works correctly or not. I've had it for 10 years and never noticed any difference in brakes. It's just that annoying light and no codes. A mystery I will solve eventually once I figure out the shop manual and what the integration relay does. Seems it has something to do with all the dash lights and many other functions.