Cadillac CT5 Multiple Electrical Failures From Bad Switch

I had a very similar ignition problem with my 2017 Cadillac CT4 last winter. With some experience working on electrical issues, I can share what helped resolve multiple electrical faults in my case. Initially, I noticed the same symptoms, gear selector display not working, cruise control failures, and the car refusing to start. The safety mechanism kept engaging out of nowhere). After visiting my regular workshop, they discovered loose cable connections at the clutch switch assembly. The repair involved: Testing the clutch switch connections, Cleaning corroded terminals, Replacing damaged wiring clips, Recalibrating the switch sensors Total cost was 95€ for parts and labor. Since the fix, all electrical systems have worked perfectly with no recurring issues. To provide more specific advice for your case, could you share: Does the issue occur consistently or intermittently? Are there any warning lights on the dashboard? Have you noticed any correlation with weather conditions? When was the last time you had electrical system maintenance? This information would help determine if your car starting problems match what I experienced or point to a different underlying cause.

Had my last service at 107832 KM. In my case, the electrical fault was indeed traced to a faulty switch in the clutch assembly. The repair shop found corrosion on the safety switch connectors which caused the electrical system to malfunction intermittently. After replacing the clutch switch and cleaning the connector terminals, all systems returned to normal. Total repair cost was 150€ including parts and diagnostics. The safety mechanism now works correctly and the multiple error codes have cleared. No more issues with starting or electrical systems since the repair.

Thanks for sharing your repair experience. Its good to hear your clutch switch replacement solved those electrical faults. Your case sounds nearly identical to what I dealt with on my CT4, right down to the corroded connectors causing intermittent issues. For anyone else facing similar car starting problems, the key signs that point to a clutch switch failure are: Multiple electrical systems affected simultaneously, Intermittent safety switch engagement, Error codes related to starting system, Issues with gear display and cruise control My switch repair was slightly cheaper at 95€ vs your 150€, but prices can vary based on parts availability. The important thing is that fixing the clutch switch resolved all the electrical fault symptoms in both our cases. Getting it properly diagnosed and repaired early helps prevent additional ignition problems from developing. Regular inspection of the clutch switch connectors during maintenance is also worth requesting to catch corrosion before it causes complete system failure.

Glad to close the loop on my original question about the CT5 electrical issues. After comparing experiences with others who faced similar problems, I'm confident the clutch switch replacement was the right fix. The multiple electrical fault symptoms matched what others described, from the safety mechanism acting up to the gear selector display failing. The 150€ repair cost seems reasonable considering the thorough diagnostic work needed to trace intermittent electrical issues to the clutch switch. My car starting reliability is now back to 100%, with no warning lights or error codes since the fix. For anyone searching the forum later with similar symptoms, checking the clutch safety switch and its connectors should be one of the first diagnostic steps. The combination of gear display issues, cruise control failure, and starting problems often points to this relatively straightforward repair. Would also recommend having the clutch switch connections inspected during regular maintenance to prevent these electrical faults from developing in the first place. Catching corroded terminals early can save both time and money.