Voyager Won't Start, Terminal 15 Ignition Issue

Had almost the exact same issue with my 2013 Pacifica diesel last winter. I have some experience working on cars, mainly electrical diagnostics and basic maintenance. The car would not start and showed similar symptoms, no response when turning the ignition switch. After checking the obvious stuff like battery and fuses, I took it to my regular workshop. They found a voltage drop in the ignition circuit due to a corroded plug connection at the ignition switch harness. The mechanic performed a complete circuit break test and discovered the power supply was interrupted due to water damage that had caused corrosion in one of the main connector plugs. They cleaned the connection points, replaced the damaged section of the wiring harness, and applied dielectric grease to prevent future issues. Total repair cost was 95€ including diagnostic time. Car has been starting perfectly since then. To help diagnose your case more accurately, could you share: Any warning lights on the dashboard before this happened? Does the instrument cluster light up when you turn the key? Have you noticed any electrical issues recently, like flickering lights? Has the car been exposed to heavy rain or gone through deep water?

Thanks for sharing those details. My mileage is 105249 KM and the last service was performed 2 months ago. Following your suggestions, I checked the relay switch connections and found significant resistance when testing the ignition circuit. The instrument cluster does light up, but no warning lights appeared before the issue. The wiring harness looks intact from what I can see, but I notice a clicking sound from the fuse box area when turning the key. Given the similar symptoms and considering its rather sudden onset, I will have the workshop inspect those connector points you mentioned. The car hasnt been exposed to water, but there could be general wear on the electrical connections. Would checking the starter solenoid voltage readings help narrow down the issue before taking it to the shop?

Thanks for those additional details about your Voyager. After my similar repair, I learned that clicking sounds from the fuse box area often indicate a weak connection or voltage drop somewhere in the circuit. The starter solenoid voltage readings would definitely help narrow things down. When I had my issue, the workshop measured around 8V at the solenoid instead of the normal 12V, which pointed directly to the wiring harness problem. Since your instrument cluster powers up, the main battery terminal connections are likely fine. That clicking sound suggests the power is reaching the relay but not completing the circuit, very similar to what my car was doing before the repair. The resistance you found in the ignition circuit is a crucial clue. In my case, the workshop discovered that even though the wiring harness looked good externally, internal corrosion was causing a circuit break that prevented proper current flow through the ignition switch. A professional voltage drop test across all major connection points would be the next logical step. When they did this on my car, it quickly revealed where the circuit was failing. Looking at your mileage and recent service history, Id suspect similar connection issues rather than a failed component. The sudden onset without warning lights matches my experience exactly.

Thanks for the detailed explanation. Your experience really helps put things in perspective. After testing the voltage at different points this morning, I found only 7.5V reaching the starter solenoid. The clicking sound from the fuse box seems to be getting more pronounced. Based on the symptoms matching your case so closely, I am now quite confident its an ignition circuit issue rather than the starter motor itself. I have booked the car in for tomorrow morning. Will ask them to specifically check the ignition switch harness connections and perform a full voltage drop test across the circuit. The fact that your repair only cost 95€ gives me hope this wont be too expensive to fix. Really appreciate you taking the time to share your experience and diagnostic steps. Will update once the workshop confirms the actual issue. The car running perfectly fine until it suddenly failed matches exactly what happened to you, so Im optimistic they will find something similar.