Volvo Repair: Check Engine Light Reset Instructions, flash flash flash, example 121

Question
What is the procedure to reset the check engine light on a 1992 960 Wagon.  I have tried the instructions in the owners manual and they have not worked.  I know that there has to be a sequence for using the pins and button under the hood but cannot figure it out.  Any assistance would be appreciated.

Answer
this is how to reset the check engine light.                                                                       in the engine bay on the drivers side near the strut tower there  are 2 small black boxes one has  a wire attached to it.place the wire in the terminal marked 2 on the box marked A .turn ignition key on (not started)press the small button for 1 second and the code will be displayed as a series of flashes.a red led displays the codes.the code will be three digits.small pause in between flashes for a single number long pause between flashes for the next number.example 121 will be flash.....flash..flash.....flash.repeat three times or until first code repeats itself.to erase the code after all codes have been checked hold the button for a good 5 seconds then release the light should light steady,then press for another 5seconds.this will erase the codes.  email me the codes and i will tell you what they are..