mreperf Posted May 20, 2019 Report Share Posted May 20, 2019 05 STS 3.6L Everything except the radio goes dead when I push the starter button. I hear a click in the under hood fuse panel after 40 seconds and everything comes back on. I can jump the starter relay and have someone push the button at the same time and it starts right up. I've checked and cleaned battery connections and grounds, replaced ignition push button. Where to next ? Quote Link to comment Share on other sites More sharing options...
Bruce Nunnally Posted May 21, 2019 Report Share Posted May 21, 2019 Could it be a bad relay? Quote Bruce 2023 Cadillac CT4-V Blackwing Follow me on: Twitter Instagram Youtube Link to comment Share on other sites More sharing options...
mreperf Posted May 21, 2019 Author Report Share Posted May 21, 2019 Starter relay was the first thing changed No difference Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 21, 2019 Report Share Posted May 21, 2019 This sounds possibly related to the security system "you can jump the starter relay and have someone push the button at the same time" Something is wrong or interrupting key start power to the solenoid energize circuit that you provide by jumping it. What happens when you simply jump it without the button pushed? Quote 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...
mreperf Posted May 21, 2019 Author Report Share Posted May 21, 2019 If I jump the relay without someone inside to hit the button it just cranks without firing. BodybyFisher 1 Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 22, 2019 Report Share Posted May 22, 2019 5 hours ago, mreperf said: If I jump the relay without someone inside to hit the button it just cranks without firing. I need to locate a schematic of your start system. Give me a day or so, I had surgery and am in the process of recovering. I need to visit the library and pull up alldata Quote 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...
mreperf Posted May 22, 2019 Author Report Share Posted May 22, 2019 Really appreciate it! Look forward to hearing from you . Thank you Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 24, 2019 Report Share Posted May 24, 2019 Ok, if you jump the relay, and someone pushes the button, it starts. Then it seems that something isn't energizing the relay, do we agree on this? It also eliminates any problems with the starter. Do you have a voltmeter? I was at the library tonight, this schematic printed small for some unknown reason, and they closed on me, Ill go back tomorrow and try to reprint it. See what you can see from this. There are 2 starter relay fuses. I don't think this print will help much. I do have the starter circuit description which I will post that might be helpful Quote 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 May 24, 2019 Report Share Posted May 24, 2019 Here is a description of the starting system for your year and model Quote 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...
mreperf Posted May 25, 2019 Author Report Share Posted May 25, 2019 I've just discovered that if I press and release the ignition button then go jump the starter relay it starts. More fuel for thought Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted May 25, 2019 Report Share Posted May 25, 2019 22 minutes ago, mreperf said: I've just discovered that if I press and release the ignition button then go jump the starter relay it starts. More fuel for thought That kind of makes sense to me based on the write up above. Quote 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...
mreperf Posted June 11, 2019 Author Report Share Posted June 11, 2019 Never was able to fix this issue. Any ideas where to go ? Much appreciated Quote Link to comment Share on other sites More sharing options...
BodybyFisher Posted June 11, 2019 Report Share Posted June 11, 2019 45 minutes ago, mreperf said: Never was able to fix this issue. Any ideas where to go ? Much appreciated I was thinking about you and this problem but you have been away. Were you able to read the diagram I posted above? @mreperf Quote 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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