With the help of the readings taken from various sensors, the engine control module deciphers the proper intervals for scheduled maintenance. When it detects a problem inside the drive train https://www.upsers.one/
In this diagram check red arrow,
PCM is on the passenger side firewall...
Zoom image link HERE.
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SOURCE: i have a 93 ford explorer 4x4 where is 4x4 module
The transfer case control module is behind the plastic panel above the left rear wheel well
SOURCE: Where is the computer module located on my 2003
open rear hatch ,look to the left panel under side window it is behind there
SOURCE: replacing the control module on my 1997 ford explorer
the module is located behind the dash just to the left of the radio. remove the two screws below the radio and the dash panel snaps out and you can access the module
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