Mustang 3.7L ignition problem? no crank, no start.

[emdem]

Hi. Im having a problem with Ford Mustang 3.7L, automatic transmission, 2012yr., problems. The first problem was- no sound coming from speakers, radio not turning on. Checked the radio power and grounds- disconnected, cleaned, connected again the radio connectors- radio somehow works again! But noticed other problem- when I turn the ignition ON, the audio comes on only after ~15sec., also the same thing for the air blower and shifter shift lock- have to wait for about 15 sec., for all work. But the car starts- everything seem to be ok. So once again I checked all fuses, power and grounds- all seems to be in place and noticed that battery charge going low. Charged up the battery and contiuned to work... Tried to start the car- starter wont work! Now the car is in no crank no start condition. Checked the starter relay- power and grounds OK, the negative control side from the PCM (relay pin 85) is OK, but the positive control side (relay pin 86) is not OK- no control on this pin. So I checked fuses all again- all fuses okay except fuse in GEM/SJB #28(audio mute)- no voltage, but when I give 12V on this fuse, the starter works- but car wont start! I tried to change GEM/SJB module- no luck. Also- no PATS light, only weird thing and fault I have, that was not before- b2a20-60, b2844-60 (ignition stuck in start), the ignition itsefl is OK, I checked. What else I'm missing? What could be causing all this? And could someone tell me about green/white wire coming from PCM and GEM/SJB to starter relay- is 12volts coming from PCM or GEM/SJB? Thanks..

 

[JAAN]

did you solve it?

 

[86GT351]

Check for water intrusion to the SJB (common issue). Under the hood on nbboth sides there are rubber cowl drains. They get clogged and the drainage needs to go somewhere so it ends up going in the car through the evaporator box where the cabin air filoter is. There are 2 drains. Just take a needle nose pliers and remove both drains. If there is water intrusion on the SJB it will need to be replaced and then the vehicle programmed.

 

[JAAN]

Check for water intrusion to the SJB (common issue). Under the hood on nbboth sides there are rubber cowl drains. They get clogged and the drainage needs to go somewhere so it ends up going in the car through the evaporator box where the cabin air filoter is. There are 2 drains. Just take a needle nose pliers and remove both drains. If there is water intrusion on the SJB it will need to be replaced and then the vehicle programmed.

I am receiving only 3.8v from pcm pin 37, any idea what it could be?

 

[JAAN]

I solved it, tomorrow I will write the problems I had and how I solved it

 

[JAAN]

I bought a 3.7 in bad condition, I was fixing problems during the year but I had one that I couldn't fix, the fans were always on, recently I realized that I had a cable from the start (bu-wth) to the starter, I disconnected it to know why I had it, I had the same symptoms as in this thread except for not having volts on pin 86 of the relay started, I had 3.8v I spent weeks trying to find out what it was. caused and I did not achieve it until a friend lent me a PCM, I sent it to be programmed and the problem was over, as an addition, the DTC p025a, check the charging system of the cluster was solved and the fans worked as they should