2020 Ram 1500 No start, new battery, starter, and ign switch

[BKR Enterprises]

UPDATED: Replaced starter 5 months ago, and battery 7 months ago. Ran fine till I used the 12v power socket over night. Started draining battery bad. Now not starting. I get no crank, no click, nothing at all. Replaced the battery, starter, and ign switch. Still nothing. Can anyone find the sequence the truck uses to approve ignition? Like what circuits are involved to go piece by piece. I have located the starter wire to the fuse block, a jump wire confirmed starter is not bad. I would like to find a schematic of what the truck "checks" before allowing the cranking over process to begin.

97k miles
4x4
Bighorn/longhorn
5.7l hemi

 

[OldMarine]

...you replaced the starter, battery, AND ignition switch without knowing what the problem is yet? not trying to make you feel bad, but don't do that again. Need to have it towed to a reputable auto repair shop, who can properly diagnose the problem. Could be as simple as a ground issue, or a broken wire, etc. Good luck sir.

 

[BKR Enterprises]

...you replaced the starter, battery, AND ignition switch without knowing what the problem is yet? not trying to make you feel bad, but don't do that again. Need to have it towed to a reputable auto repair shop, who can properly diagnose the problem. Could be as simple as a ground issue, or a broken wire, etc. Good luck sir.

Yes, because I had already purchased them in past and were under warranty. If you have nothing to add to the situation please standby so others can. Thanks.

 

[kapinallinen2]

Yes, because I had already purchased them in past and were under warranty. If you have nothing to add to the situation please standby so others can. Thanks.

AlldataDiy Advanced DIY Automotive Repair | ALLDATA DIYwill have your model year specific diagrams, troubleshooting and theory of operation for not much money. I have subscribed for several years my self.

 

[OldMarine]

Yes, because I had already purchased them in past and were under warranty. If you have nothing to add to the situation please standby so others can. Thanks.

I DID add to the post...I added advice, just because you might not LIKED the advice...well....too bad.

 

[Cbty2050]

I DID add to the post...I added advice, just because you might not LIKED the advice...well....too bad.

I agree with everything you said. He did what many techs would have done, unload the parts cannon and hope it works.

There is a kline bus circuit from kin to rfh to get **** started. Then the key needs to be verified by the antennas/rfh. Then the bus circuits become flooded and if*(I drank a lot last weekend) I recall the pcm needs to send a signal to the starter relay in the pdc.... It could be the bcm, I don't care to look right now. Then the starter goes spin. There's some other thing that need to happen electronically via the bus networks to allow starter operation.

 

[kapinallinen2]

About sums it up.

 

[brokeninside]

I am having similar issues to what was described here on my 2020 ram rebel, were you able to find a resolution. I have confirmed it is not the batter or the starter, I have not replaced the ig ition swith yet.

 

[kapinallinen2]

I am having similar issues to what was described here on my 2020 ram rebel, were you able to find a resolution. I have confirmed it is not the batter or the starter, I have not replaced the ig ition swith yet.

Your comm`s could be down, bad RF hub is first on the list to check. Got any water intrusion in the back?

 

[brokeninside]

Your comm`s could be down, bad RF hub is first on the list to check. Got any water intrusion in the back?

No signs of water intrusion. The key fob still locks and unlocks the car would that still be working if it was the ref hub? I will take a closer look at the hub in the morning. Would a lose ground wire be a potential cause?

 

[kapinallinen2]

No signs of water intrusion. The key fob still locks and unlocks the car would that still be working if it was the ref hub? I will take a closer look at the hub in the morning. Would a lose ground wire be a potential cause?

Key fob working kinda rules out the hub, yes, take a look at the grounds. Beyond that, need to look at the data with diagnostic tools.