Cranks-no-start after battery drain

[Marty123]

The other day the battery light on my JK 2011 3.8 came on while on the highway. I tried to push on home but after 10 mins all hell broke loose. All lights startred blinking and 10 secs later the engine died and I pulled to the side. Had to order tow service to parking lot. Then from there my friend helped me flat tow to my home. I'm guessing alternator failure but haven't gotten to that yet since the engine wont start efter new battery (the old one needed changing anyway)

Some facts:

- cranks healthy but no start
- no spark
- no power to ignition coil (it seems - but maybe when cranking - can't check)
- no codes. either with ODB2 or manual check
- ODB2 presents VIN so communicates with PCM
- OD/off light is lit and can't be turned off with button
- ESP light is lit (skidding car symbol)
- grounds are ok (the ones I could find/get to)
- checked all fuses, they look good
- switched around relays - no effect
- I can hear whirring 2-3 secs when connecting battery - fuel pumps ok?
- removed and opened PCM. Doesnt look burned or faulty to the eye
- all electricity seem to be working inside car, gauges working
- fuel in tank
- tried starting in P and in N, no difference

Please advice

-

 

[BLACKJKU]

The Factory battery clamps are know to be junk, replace them with HD ones.

Do you have 12v's now at the new battery? Check to see if you also have 12v's at the starter on the battery cable.

 

[Marty123]

The Factory battery clamps are know to be junk, replace them with HD ones.

Do you have 12v's now at the new battery? Check to see if you also have 12v's at the starter on the battery cable.

Thank you for answer. The engine cranks real healthy so seems starter is getting power. New battery, shows 12.5 when newly charged. Clamps and harness looks good, no corrosion, no visual wear on cables. (Difficult for me to measure anything while cranking since working alone at the moment...).