Dealing with bad breakdowns

Yeah, at a minimum you should be getting fault code printouts with the fault code numbers and etc so you can do research and gather intel yourself. This could be as simple as an intermittent/ full on power loss to the ECM. Which has nothing to do with an abs harness.

Getting these codes, doing the research, learning the systems can give you a more informed position in making decisions on what to do and what not to do. Come back to us with a code or something more than a symptom. Because if your willing to wait up to 8 weeks and don’t even know the computer readouts... that’s crazy!

 

Need to know exactly. J1939 is a multiplex system that includes the abs and more. If there’s a major J1939 code it very well might show abs fault codes because abs utilizes J1939 data transfer. I know a 2012 Pete 587 owned by a friend who had a no start, ECM power issue, (J1939 ABS) issue. He had a very corroded power wire to the ECM. After we cut into that wire, it was ice blue for inches upon feet. This caused the resistance, not allowing the amperage for the volts. If your ECM isn’t powering right then your J1939 is probably having issues too

 

Some thoughts.
Supprised that the abs ecm and harness both fail? Unless corrosion at the main abs ecm plug.
Abs can absolutly interrupt 1939 which can cause gauges to go wonky, ect.
If it is the abs causing issues, unplugging it should fix it then? Id drive with no abs until the proper parts arrive to fix it. Worst is an abs light will be on and possibly a cel.
Abs harnesses will get made as per s/n and sometimes it can take awhile to get them.
I have had to wait 2 months for a full set of harnesses for 1990s trucks.

I have had long wait times for parts to repair properly but most times done a temporary fix or bypass to allow the customer to keep running. Why would I want a dead truck clogging up yardspace?

 

If there is any other information that you can give be as specific as possible.

There are guys on this site they really know their stuff regarding those computerized trucks and you can trust their advice they'll help you if they can.

 

8 weeks....?....huh? Are they walking the parts there from China or something.

You sir have better anger management skills than I do. Something is off? Bco and shop have a back door deal or something? 2 months is a month longer than doing a full on rebuild

 

It is quite possible for an ABS module to spam up a datalink. We had a bad batch of J1939 modules that control a posi air shutoff (an aftermarket component used on stuff in the oilfield). It would cripple the entire unit. Unplug it and everything would run perfect.

Odds are one or the other failed. Highly unlikely both did IMO. Computer modules rarely fail. My money would be on either a faulty wire in the datalink or a power/ground wire issue to the ABS module (if the shop correctly diagnosed that node as the source of failure).

If its just a broken or corroded power/ground wire to the ABS module, is there any reason why they can't just splice in a fused external wire to get you up and running until the harness shows up?