jetblaster24 Posted June 20, 2007 Report Share Posted June 20, 2007 Hello first time on this forum and first time caddy owner. I think this is the right place to ask but i have been getting these 2 codes from the dtc, they are ACM B1983 and MSM U1064. I have no idea what they are but my car about every 2 days loses all of its memory and almost seems to restart the computer. The alarm wont work and it will act as if it is dead. I also think the A/C could work better it only blows cold when you drive about 50 and higher for more than 10 mins. When u slow down it warms back up. If any one could help it would be great. Link to comment Share on other sites More sharing options...
Ranger Posted June 20, 2007 Report Share Posted June 20, 2007 B1983 - Device Power Circuit Low U1064 - Loss of Communications with DIM You can find the code definitions here. http://myweb.accessus.net/~090/dtcobd2.html Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 20, 2007 Report Share Posted June 20, 2007 Have you cleaned the battery connections especially the positive battery connection? Some years allow you to take the positive cable ends apart, there are two cables there, take them apart and clean the connections between them including the lead lug if you have one, Mike Also have your battery load tested Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
jetblaster24 Posted June 21, 2007 Author Report Share Posted June 21, 2007 Have you cleaned the battery connections especially the positive battery connection? Some years allow you to take the positive cable ends apart, there are two cables there, take them apart and clean the connections between them including the lead lug if you have one, Mike Also have your battery load tested what about the a/c battery failed load test thanks for your help Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 21, 2007 Report Share Posted June 21, 2007 Have you cleaned the battery connections especially the positive battery connection? Some years allow you to take the positive cable ends apart, there are two cables there, take them apart and clean the connections between them including the lead lug if you have one, Mike Also have your battery load tested what about the a/c battery failed load test thanks for your help I would have an AC shop evacuate it and recharge it, you are probably low in freon.. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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