1989 Dodge Dakota transmission

This vehicle has a very basic computer system, but it can still provide helpful info. Have you checked to see if there are any trouble codes?

Most parts stores are lost if it isn't an OBD2 system.

It's really simple.

Within five seconds, switch the key from off to the run position 3 times (on, off on, off, on. The 3rd time, leave it in the run position (engine off).

The "check engine" light will flash.

Each code is a two digit code, so a code 23 would be FLASH FLASH (pause) FLASH FLASH FLASH (longer pause before next code)

The system will end with a code 55 which is normal.

Write down the numbers as the occur.

NOTE: A code 33 is normal on earlier models without AC, so don't be alarmed. As I mentioned, a 55 will be the last one you see.

Do this and let me know what you find. It's going on midnight here, so I have to get to bed, but I'll be back tomorrow night.

Take care.

Code 25 -- automatic idle speed motor driver circuit, short or open detected. This device is responsible for maintaining the engine idle speed. An open circuit is basically the same as a cut wire. No power is getting to where it needs to be. Shorted means power is going straight to ground.

Code 34 -- speed control servo solenoid, open or short detected. I question if this has to do with the OD. This is for cruise control. Basically, the system thinks there is an open winding in the system. Even if your truck doesn't have CC, the computer circuitry and software for the cruise control system is installed in the ECM.

What other codes did you find?