Cadillac Repair: 1992 cadillac seville codes i33 i034 i037, cadillac seville, 1992 cadillac seville

Question
on this Seville at times the climate control and fuel info center goes --- and blower runs on high defrost only .I understand this a data line problem or a component but I'm not sure what I'm looking for.i think I'm looking for a 3 to 5 volt swing on the tan data line,but if I'm not getting this reading can i run a line from any other data line in the loop or do i have to go to the sours of that particular wire. do's the data circuit run in both directions or do's it only go one way.and components have to be in order.oh one last thing i pulled the top dash pad and i grabbed the connector at the cluster the one on the left of speed-O and it started to work but this only worked two times.I've taken the cluster apart to check if i could see anything but to my dismay nothing found

Answer
I033 = loss of SIR data.

I034 = loss of pcm data.

I037 = Loss of programmer data for A/C clutch.

NO, NO, NO, You CANNOT run a looped data line from another component to facilitate operation of the faulty component. You will need, If necessary, Electrical schematics and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture.  I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.