Flashing WTS/ ECM replacement

[mbloom65]

Went to start my 1999 2500 and the battery was dead. After charging the battery, My wait to Start light was flashing and wouldn't start. I have read a lot about this pointing to a bad ECM. I was planning on sending mine to carcomputerexchange.com. $514 for a rebuild and lifetime warranty.

I haven't pulled any codes yet. I'm going to buy an OBD2 reader tomorrow when i get off work.

My questions are...

1. Is there anything that would fry the ECM that i should check before the new one goes in?

2. Has anyone dealt with carcomputerexchange?

Also, my WTS light hasn't come on at all for about a year, but starts overtime no matter the temperature.

 

PS- I removed my grid heater

[dripley]

 

I have no experience with the vendor, but we do have this by one of our members.

 

Auto computer specialist is vendor here also.

 

Be careful who you go with if your ECM needs replacing. It can be nightmare.

[mbloom65]

Thanks for the reply! I would like to put this ECM problem to bed for good... the first time!!

 

I have read about AC noise coming from the alternator, can this be checked outside the vehicle at a shop? 

 

[Mopar1973Man]

I've dealt with Auto Computer Specialist in Florida for my PCM failure. Excellent people. @Auto Computer Specialist

 

As for the AC noise you need to have the alternator bench tested for safety. If you have a quality DVM you could do it yourself following my write up. I still suggest removing the alternator and bench testing is the safest option. Then you'll need to do the W-T ground wire mod then do the PCM protection mod. 

 

 

[mbloom65]

Just giving an update... replaced my alternator. I am getting ready to ship my ECM to Autocomputerspecialist in Florida. Hopefully while the ECM is getting rebuilt I will do the W-T mod and PCM protection.

 

 

I was able to start my truck about twice after i got new batteries and alternator (only when the WTS wasn't flashing)? Is that a good sign, or is that irrelevant?

[pepsi71ocean]

On 1/14/2019 at 7:17 PM, mbloom65 said:

Just giving an update... replaced my alternator. I am getting ready to ship my ECM to Autocomputerspecialist in Florida. Hopefully while the ECM is getting rebuilt I will do the W-T mod and PCM protection.

 

 

I was able to start my truck about twice after i got new batteries and alternator (only when the WTS wasn't flashing)? Is that a good sign, or is that irrelevant?

 

Just means you hopfully don't need to do the Vp-44. I'm thinking its just the ecm. You got lucky sir.

[Mopar1973Man]

Flashing WTS is a sign of a problem typically. I'm trying to remember but something about the ECM booting or software error IIRC.