Sand Box John wrote:I don't recall if it was mentioned here but WMATA stopped taking delivery of the 7k cars back in May because of this issue.These kinds of problems can be a bear to diagnose. Although I suspect it might get a little easier if they are aware that there might be wiring harness issues.
The issue has to do with continuity at wiring connections that could result in premature failure causing a great deal of time to be spent troubleshooting to find the broken connection.
It should be noted that this more of a performance and reliability problem then a safety problem.
Are they going to install the chains at the same time they have the cars in to fix the wiring?