No power in cabin - Hyundai Genesis Forum
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post #1 of 5 Old 3 Weeks Ago Thread Starter
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No power in cabin

So had an interesting scare yesterday. Was beautiful turbo weather in NC, went to start my car and as I turned the key the lights in the dash and all over the cabin went out. Sure enough it wouldn't turn over.

Despite this the windows worked and the remote lock/unlock still functioned. I popped the hood and nothing seemed obvious or wrong. However, I had to get to work so I grabbed my other keys and took my other car.

So I went back this morning to try and troubleshoot and every things working. No signs of power issues, car started immediately and drove without issues to work (25-30 minute drive on highway). I guess we can rule out dead/low battery, fuses, but makes me wonder what it was. The only thing I can think of that makes sense would be a loose battery terminal? Even that doesn't make sense because other electrical things were working...

I'm gonna keep an eye on this and connect the battery to my battery tender later to check on its health. I drive the car multiple times a week, typically to work so unless the alternator is on its way out it should be charging.

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post #2 of 5 Old 3 Weeks Ago
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relay
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post #3 of 5 Old 3 Weeks Ago Thread Starter
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From what I was reading the starter relay shouldn't effect the power to the radio, lights, or dash.

Was there a particular relay you suspect or the starter relay? I work in IT, I have enough sense to realize this will be hard to troubleshoot if the issue doesn't return. Just want to make sure I have a list of things to grab/troubleshoot should it return. Always good to have an action plan for data collection for troubleshooting intermittent issues.

Model: 2013 2.0T Premium | SFR Stage 1.5

Piping: Injen SRI | Forge BoV
Exhaust:ISR Catback | CP-e downpipe w/cat
Differential: Quaife LSD
Transmission: Stage 2 clutch w/ SMF | Meganracing Trans mount
Suspension: BC racing coilovers
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I would eliminate the battery first as a possible source of the problem. Myself and others have experienced weird electrical problems, trunk/gas door release working intermitantly and the power windows not going down a little when opening the doors in my case, but the car still started for several weeks before the battery died. after i replaced the battery the problem has never reoccured. It might save you from chaseing down shadows especialy if the battery is more than a couple of years old.
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If the battery was under 10.5V then the relays will not pull in. Lights and windows may still work.

Easy to check the battery with a voltmeter. Should be 12.3v, or so when off and above 13.5v when running.

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