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post #1 of 6 (permalink) Old 25th January 2007 Thread Starter
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Question Head Unit Grounding!!

When I installed an after market head unit in the car I noticed that the factory installed Blaupunkt head unit had a wire connected to the rear of it (connected to a flat connection that is part of the head units casing).

Am I right in thinking that this is what the head unit is grounded by?

If that is the case, do I need to ground the new head unit as I can see no way of doing this?

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post #2 of 6 (permalink) Old 26th January 2007
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post #3 of 6 (permalink) Old 26th January 2007
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I'm going to say no, simply because there's a ground provided on the ISO harness, so I see no reason why it should need to ground to the cage.

I may well be wrong though.

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post #4 of 6 (permalink) Old 26th January 2007
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I'm inclined to agree. Not providing a ground wire in the loom is a Japanese trick. European cars with ISO wiring don't pull that particular stunt. You can confirm that the stereo is wired correctly (and not grounding through the antenna earth) by running it with just the two main ISO blocks connected. If it works, then it's fine.

My only concern is that the wire is the ground for something else. If you don't re-attach this wire, then you may notice later on that something else isn't working. I'd be inclined to just try leaving it unhooked for the moment (put some tape round it in case it shorts to anything.) If you notice something else in the car doesn't work later on, then try connecting the wire to a suitable ground.
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post #5 of 6 (permalink) Old 26th January 2007
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I noticed this wire last nite when I fitted my new headunit. All I did was tape it up. I have driven the car today and everything is working fine, including the new headunit.
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