Where is the computer on a 93 dodge ram 150?

A 1993 Dodge Ram 150 doesn't have a single, central "computer" like modern vehicles. Instead, it uses several Electronic Control Modules (ECMs) or control units distributed throughout the vehicle. The main ones relevant to engine operation are usually located:

* Under the hood: This is the most likely place to find the Powertrain Control Module (PCM), often referred to as the Engine Control Unit (ECU) or the main computer for the engine. It's usually a fairly large black box, often near the firewall or along the side of the engine.

* Under the dash: Other control modules for things like the body control system, climate control, and instrumentation might be found under the dashboard. These are often smaller than the PCM.

Without a wiring diagram specific to your truck's options and build, pinpointing the exact location of each module can be difficult. A service manual for your specific year and model Dodge Ram 150 would be the best resource to identify the location of each module.