How do you reset the computer on a 1989 Dodge Dakota truck?

A 1989 Dodge Dakota doesn't have a "computer" in the same way modern vehicles do. It doesn't have a central processing unit that you can reset in the way you might reset a modern car's computer by disconnecting the battery. The electronic control modules (ECMs) are simpler and less sophisticated.

What you might be referring to is resetting various systems, which would involve different procedures depending on what's malfunctioning:

* Check Engine Light (CEL): There's no simple "reset" button. The CEL will typically go off after a certain number of successful drive cycles *if* the problem that triggered it has been resolved. If you've fixed a problem, drive the truck for several cycles to see if it clears. A code reader is needed to diagnose the cause of the light.

* Other Electrical Issues: If you're experiencing random electrical problems, disconnecting the battery's negative terminal for a few minutes can sometimes help. This clears out residual power that might be causing a glitch. Reconnect the negative terminal *after* reconnecting the positive. Always be careful when working with car batteries.

* Specific Component Resets (e.g., Power Windows): Some components might have their own reset procedures. Check your owner's manual.

In short, there's no single "reset computer" procedure for a 1989 Dodge Dakota. The approach depends on the specific problem. If you're having a persistent issue, a mechanic with experience in older vehicles is your best bet. They can properly diagnose and address the problem.