Check Engine Light and EATC unit

[rick_ca]

Ok here whats happens i start truck no C.E.L (check engine light) i drive for 1/2 hr the light comes on I park for 15mins come back start truck no C.E.L drive for an hour light comes on again, park overnight same thing after 1/2hr driving the light comes on going to try the old fashion wire and see if couting flashes work tomorrow (btw its a 95 EB ). Also can anyone tell me where the control board is for the EATC unit is all I have is high speed on my blower fan no matter what temp I set it (its not manual resistor type that much im sure).

 

[daffy]

Not sure on your CEL, but as for the blower motor, the control module is in the blower motor housing, look at the passengers side firewall at the blower motor, you'll see a bundle of wires going to it, it's about 1" x 3", and sticks out about 1 1/2".