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philipp_moeller1

Laguna poor starting Terminal 30 issue

Hey, I'm having a weird issue with my 2010 Renault Laguna gasoline. It's got about 74,668 km on it. Lately, it's been starting really poorly, like the battery is almost dead. I did some digging and it looks like I've got a continuous interruption to Terminal 30 plus. Could a heavily discharged or defective battery be causing this? Or am I looking at a bigger electrical fault here? Anyone experienced something similar?

Summary of the thread

A 2010 Renault Laguna is experiencing poor starting, suspected to be linked to a continuous interruption to Terminal 30 plus. Possible causes include a heavily discharged or defective battery, or a larger electrical fault. Suggestions include checking the battery, circuit breaker, wiring harness, and ignition switch for issues. Ultimately, consulting a qualified automotive electrical technician is recommended to accurately diagnose and resolve the problem, which was confirmed to be a faulty circuit causing battery drain.

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4 comment(s)

gertsky4

It sounds as though you are experiencing an electrical anomaly. Is the battery original to the vehicle, or has it been replaced? Furthermore, have you inspected the circuit breaker, wiring harness, and ignition switch for signs of degradation, corrosion, or damage? These elements could contribute to the symptoms you described. Does the vehicle display any warning lights when starting, and have you checked the charging system's voltage output?

philipp_moeller1 (community.author)

Thanks for the quick reply! The battery was replaced about three years ago, so it's not brand new, but shouldn't be totally dead either, right? I haven't checked the circuit breaker, wiring harness or ignition switch yet. To be honest, I wouldn't even know where to start! What would be the easiest way to inspect these things? And where are they located?

gertsky4

Given the age of the replacement battery and your unfamiliarity with electrical systems, I would suggest consulting a qualified automotive electrical technician. Continuously interrupted current to Terminal 30 can be challenging to diagnose without appropriate tools and expertise. Attempting repairs without adequate knowledge could exacerbate the issue or create further complications. The technician will use specialized equipment to check for parasitic drains, faulty wiring, and diagnose issues with individual components.

philipp_moeller1 (community.author)

Okay, thanks for the advice. I suspected it might be beyond my abilities. I took it to a workshop and they confirmed it was a faulty circuit causing the battery drain. Repair cost was 290€. Appreciate the help!

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RENAULT

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LAGUNA