Out of Ranger

A Ford Ranger had turned up at a garage overnight, with the keys posted through the letter box and a note asking if the garage could get it going.

The problem here is not fixing the vehicle but a lack of information.

1, how did the fault occur
2, when did it happen
3, with which key(s)
4, how much are you willing to spend

The customer was contacted and answered all the questions, but fustrated at the lack of diagnosis, surely you can just plug it in and find out what's wrong?

The garage did not have the diagnostic plug to tackle the job and asked if I could have a look. I found a code stored P1649 pump control module malfunction.

After a quick check of the supply and grounds this looked like a ECU fault.
The module was removed and sent away for repair, it was repaired but the vehicle still would not start. Next step was to check the engine ECU, a separate ECU that shares inputs and outputs with the pump control module. This too appeared to be in trouble. So this was sent away for testing and repairs.

What had caused the damage to both control units and is the problem going to destroy the repaired units?

Further testing didn't show any problems. The customer told us upon collection he had tried jump starting the vehicle when it refused to start, and thinks he may have got the leads the wrong way round!