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erwin_schulz1

Terminal 15 Ignition Interrupted

I am experiencing an intermittent starting issue with my 2013 Ford BMAX gasoline. Mileage is at 242113 km. Diagnostic reveals 'Terminal 15 ignition positive interrupted' with the symptom being that the engine does not start. Root cause analysis points to a defective cable or plug connection. Has anyone encountered a similar issue? I have checked the battery terminal and voltage drop. I would appreciate any insights.

Summary of the thread

The issue involves an intermittent starting problem with a 2013 Ford BMAX, diagnosed as 'Terminal 15 ignition positive interrupted,' indicating the engine does not start. The root cause is identified as a defective cable or plug connection. A suggestion to check the fuse box and power supply relay was provided, leading to the discovery of a corroded connector near the fuse box, which was repaired by a professional.

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4 comment(s)

nelesturm33

I had a similar problem on my older Opel Astra. 'Terminal 15' refers to the switched positive power supply that's active when the ignition is on. Did you check the fuse box related to the starter solenoid or the power supply relay? A defective relay can cause the same symptom.

erwin_schulz1 (community.author)

Thank you for the hint. Could you elaborate on the specific fuse or relay location that was problematic on your Opel Astra? I have already inspected the readily accessible fuses, but perhaps I overlooked a less obvious one.

nelesturm33

I don't recall the exact location on the Astra, but it was within the main fuse box under the hood. Honestly, the fault finding was proving difficult, so I ended up taking it to a workshop.

erwin_schulz1 (community.author)

Understood. Thank you for confirming the potential issue. I followed your advice and had a professional diagnose the problem. It was indeed a corroded connector near the fuse box, leading to the interrupted Terminal 15 signal. Repair cost was 95€. Appreciate your help.

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FORD

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BMAX