After warm up

Hi, I have a 93 rodeo, & when i start it up, the battery,gas, & other lights in the dash stays on and blower motor does not work until it warms about 20minits or so later then the lights go out & the blower motor starts working. Is there a voltage regulator problem going on or is there something else happening? Please help. Thanks

Typically all the light come on due to a dieing battery and/or a dieing alt.