myeldog Posted January 18, 2006 Report Share Posted January 18, 2006 Does anyone have a diagram showing the location of grounds for the 94 Eldorado ? Here is the problem the alternator is not charging the battery. The alternator has been replaced twice (shop expense). from all indicators the battery is good, the alternator is new (reman). after about 15-20 miles the voltage start to drop,until i get battery no charge. as the voltage drains I get battery voltage to low and soon the battery is to weak to operate the car. even though the battery test out to be good at full charge the alternator test indicate that it is not supplying return voltage. I was told that this problem could be related to a ground !! anyone ever heard of such ??? are there any other factors that would cause perfectly good alternators to not function. Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 18, 2006 Report Share Posted January 18, 2006 Do you know if this an rebuilt alternator and where it was purchased? Has the obvious been checked, especially the positive cable (has it been taken apart and cleaned?) 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...
myeldog Posted January 18, 2006 Author Report Share Posted January 18, 2006 Do you know if this an rebuilt alternator and where it was purchased? Has the obvious been checked, especially the positive cable (has it been taken apart and cleaned?) I took the cable apart after i got your reply cleaned it and reassembled it took the eldo out for a drive and after approx 10 miles. the info ctr gave me the low battery voltage again . i havent tried anything else I'm stumped. battery back on charge. Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 18, 2006 Report Share Posted January 18, 2006 For the hell of it, try another battery, I have been hearing about internal battery shorts. When it is charging is it charging at a normal rate? I would remove all grounds in the area of the battery connected to the frame and look for corrosion, clean them up with a wire brush and re-attach.. This is a hard one to diagnose.. 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...
BodybyFisher Posted January 18, 2006 Report Share Posted January 18, 2006 You didn't answer my question, was this a rebuilt alternator? Is that why the shop keeps replacing it at 'shop expense' as you say. Remember we have seen rebuilt alternators in the past cause problems. Consider that.. Anyone have any ideas on this one? Anyone have the grounds schematic from a 94 manual? Mike See this thread http://caddyinfo.ipbhost.com/index.php?showtopic=6170&st=0 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...
myeldog Posted January 19, 2006 Author Report Share Posted January 19, 2006 You didn't answer my question, was this a rebuilt alternator? Is that why the shop keeps replacing it at 'shop expense' as you say. Remember we have seen rebuilt alternators in the past cause problems. Consider that.. Anyone have any ideas on this one? Anyone have the grounds schematic from a 94 manual? Mike See this thread http://caddyinfo.ipbhost.com/index.php?showtopic=6170&st=0 Thanks for the thread on battery no charge. I was so aggrevated about the whole matter yesterday that i failed to call the shop to check , rebuilt/new... Today I will check I will also ask that they check the replacement for defects before installation. I was developing "brain scatter" until I reviewed the thread,the statement made by navion was brilliant now I have a new way of looking at those who are just occupying space for no apparant reason. Icant stop laughing, whew!!!! I'll get the answer re: new/rebuilt later today. Ron Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 19, 2006 Report Share Posted January 19, 2006 OK Ron, by the way, its doubtful that they check for defects before installation, I do not believe they would have the equipment to do so. I have a very professional starter/alternator rebuilder that has the capability to bench check alternators, its fairly specialized equipment. If its an aftermarket rebuild, I am not sure what that shop will offer to do at that point, R&R'ing an alternator on the NS is a bear.... Let us know how this turns out. You might just go and buy a new alternator and have them install it, consider rockauto or gmotors. Obviously I dont want you to just parts replace, make sure its the alternator before you do this, but if its a pep boys type of rebuild, you have a big question mark right now... What where the symptoms before you had this job done, is there another thread? Mike 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...
myeldog Posted January 20, 2006 Author Report Share Posted January 20, 2006 OK Ron, by the way, its doubtful that they check for defects before installation, I do not believe they would have the equipment to do so. I have a very professional starter/alternator rebuilder that has the capability to bench check alternators, its fairly specialized equipment. If its an aftermarket rebuild, I am not sure what that shop will offer to do at that point, R&R'ing an alternator on the NS is a bear.... Let us know how this turns out. You might just go and buy a new alternator and have them install it, consider rockauto or gmotors. Obviously I dont want you to just parts replace, make sure its the alternator before you do this, but if its a pep boys type of rebuild, you have a big question mark right now... What where the symptoms before you had this job done, is there another thread? Mike Well at this hour the jury is still out on the alternator replacement. got in late last evening and didnt get the eldo to the repair shop until just before closing. I'm suppose to hear from them again this evening, since it didnt take long for the symptoms to show up the shop asked if they could repair it and run it during the day to determine if the eldo was sick or their alternators. They were suppose to get a new one as oppose to the rebuilds they have been buying- before i had this alternator (#2) all the lights went dim to out and all the warnin g lights came on similar to when you turning the ignition on but not starting, since I had just replaced the alternator about 45 days before I never thought that the alternator had gone bad. Ithought that I had an electrical short. I posted the discussion on this site. as the days went by it occured to me that the symptoms were the same as they were for alt #1 (Cooler heads pervail) called the shop and the alternator was still under warranty,so here we are at this point. I'll let you know when/how the problem is solved . Ron Link to comment Share on other sites More sharing options...
myeldog Posted January 21, 2006 Author Report Share Posted January 21, 2006 ok Mike, the the jury came in at 5:58 Eastern, aftermarket alts will not do it for the N* although they say at the shop all of them (#1) were new. thus far the ac delco is doing the job, with everything on and that includes the 4-ways,and the cig lighter in it was drawing 13.6 The shop said that they installed it last night and drove it last night as well letting it run under load during the day.Hopefully the problem was solved with the installation of the AC Delco alt things will work out, so now it's on to the next thing. Thanks once more... Ron Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 21, 2006 Report Share Posted January 21, 2006 Glad to hear it Ron, this was a good lesson for the group also, thanks for the feedback...let us know how it is in a couple of days, Mike 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...
growe3 Posted January 22, 2006 Report Share Posted January 22, 2006 You didn't answer my question, was this a rebuilt alternator? Is that why the shop keeps replacing it at 'shop expense' as you say. Remember we have seen rebuilt alternators in the past cause problems. Consider that.. Anyone have any ideas on this one? Anyone have the grounds schematic from a 94 manual? Mike See this thread http://caddyinfo.ipbhost.com/index.php?showtopic=6170&st=0 I know I am a late arrival to this thread, but I thought that only remanufacturesd alternators were availible. I have replaced the alternator on each of my 93' STS's. After much searching I was only able to find rebuilts. Both units (AC Delco) work fine, and have been being driven daily for about two years. As for grounds, one often overlooked one is right next to the battery. Standing at the right fender, looking down at the battery, just to the right protruding from the front frame panel, is a Grounding Post. It has several several ground wires attached, including one directly from the battery. This post must be clean from any corrosion and tight. If the post looks clean, use a 12 mm wrench or socket to loosen the nut a turn or so, wiggle the wires and then re-tighten firmly. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 22, 2006 Report Share Posted January 22, 2006 George do you mean you used an AC Delco rebuild? I agree with that ground near the battery, I had mentioned to Ron to inspect all grounds near the battery for corrosion. We have seen many problems in the past with the pep boys, autobarn types of rebuilds. Mike BTW, how are you placing a photo at the bottom of your posts, is it a link? 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...
growe3 Posted January 23, 2006 Report Share Posted January 23, 2006 George do you mean you used an AC Delco rebuild? I agree with that ground near the battery, I had mentioned to Ron to inspect all grounds near the battery for corrosion. We have seen many problems in the past with the pep boys, autobarn types of rebuilds. Mike BTW, how are you placing a photo at the bottom of your posts, is it a link? Yes, AC Delco rebuilt. Mine ended up costing $185. Normally I would have gone for a new one, particularly due to the difficulty in replacing it, but all I could find were rebuilts. It turned out to be fine so far. The parts are listed at: http://www.acdelco.com/html/catalog/index_auto.htm The picture of my blue STS is from one I have stored online. I placed it within my "signature" file here. I tried to keep it small in kbs, to not be a nuisance for the dial-up members. -George Drive'em like you own 'em. - ....................04 DTS............................ Link to comment Share on other sites More sharing options...
BodybyFisher Posted January 23, 2006 Report Share Posted January 23, 2006 Your AC Delco rebuild is a high quality rebuild, that is a lot different than the pep boys level of rebuild. I wouldn't hesitate to use an AC Delco rebuild at all... I have some web space, I am going to try the same thing you have done with the link, Thanks 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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