I cannot find the ecm on the 89 f150 6 cyl. 4.9. The only computer I found was behind the ash tray near the stick shifter. I opened it up and it said rear antilock brake on the circuit board.
What color is it? Where should I look?

 

It's behind the driver side kick panel near the parking brake pedal. Silver box, and be sure to disconnect the 60 pin wiring plug on the engine side of the firewall.

 

Yep what Eric said.

 

found it thanks