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Skajme

Strange stereo problem

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In my new GTI the stereo only seem's to work after I've been driving the car for a while, it won't switch on or show any signs of life, then all of a sudden it bursts into life when i'm driving along. It's definitely not the stereo because it does the exact same with two different ones i've tried...Things I maybe think it is (shot's in the dark to be honest) bad earth/wire damage perhaps or battery not strong enough? Noticed theres some greenish gunk around the battery connections aswell, dunno if that's significant? The car had barely been used before I got it so could it maybe be the alternator? It's very odd, once it does finally come on it works totally fine

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Once the car is running the alternator should power all the accessories. 

Test the voltage coming from the alternator. Test the voltage coming from the battery too.

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If the battery has enough ooomph to crank the engine it should have enough to fire up the stereo, I’d say it’s more of a wiring/connection fault, down the road it jumps around and sparks up the radio.

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2 hours ago, Pete said:

If the battery has enough ooomph to crank the engine it should have enough to fire up the stereo, I’d say it’s more of a wiring/connection fault, down the road it jumps around and sparks up the radio.

Rather than down the road though it takes about an hour of driving roughly to come on, not really relative to any sudden bumps in the road or anything like that. It's very odd.

Edit: This has just popped in my head actually, the stereo hasn't forgotten any settings or anything when it comes on, which would suggest it is constantly getting power?

Edited by Skajme

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9 hours ago, Skajme said:

Rather than down the road though it takes about an hour of driving roughly to come on, not really relative to any sudden bumps in the road or anything like that. It's very odd.

Edit: This has just popped in my head actually, the stereo hasn't forgotten any settings or anything when it comes on, which would suggest it is constantly getting power?

Certainly would. 

What if the car is just on igniton on? Does the stereo work then? 

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2 hours ago, cj1 said:

Certainly would. 

What if the car is just on igniton on? Does the stereo work then? 

Nope, nothing then either. Had a go this morning.

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Time for the multimeter if you ask me. Get tracing those wires.

First thing I would do, is try and earth it. Take an earth from the stereo to a totally independent earth. Recently had a similar issue in this banger Mazda I own. Solved by finding a new earth and running an independent line from the back of the radio.

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