How do I get the OBD-1 codes from my '94 van? Do I need the OBD-1 code reader, do I need to hook up some gizmo to the data link connector at the PCM, or how do I elicit the blinking light for counting?

I can't seem to find the information in my factory service manual.

 

Within a period of 5 seconds, cycle the ignition key
ON-OFF-ON-OFF-ON.

1. Count the number of time the MIL (check engine lamp)
on the instrument panel flashes on and off. The number
of flashes represents the trouble code. There is a short
pause between the flashes representing the 1st and 2nd
digits of the code. Longer pauses are used to separate
individual 2-digit trouble code.

An example of a flashed DTC is as follows:

-Lamp flashes 4 times, pauses, then flashes 6 more times.

This denotes a DTC number 46.
-Lamp flashes 5 times, pauses, then flashes 5 more times.

This indicates a DTC number 55.
DTC 55 will always be the last code to be displayed.

Clearing codes can be performed by turning the ignition off
and removing the negative battery cable for at least 1 minute.
Removing the negative battery cable may cause other systems
in the vehicle to loose their memory. Prior to removing the
cable, ensure you have the proper reset codes for radios
and alarms

 

+++1^^^ Give that man a beer or three!!!

 

This is for the trucks but should work on vans.

http://dodgeram.info/Engine-Gas/OBDI/pcm_fault_code.htm