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Author Do amps have a negative on the battery?
Behr
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Registered: 5th Feb 07
Location: Hemel Hempstead
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8th Jun 09 at 12:15   View User's Profile U2U Member Reply With Quote

thats the RCA cable that just sound not power,

~There should be a cable from the battery to the amp

[Edited on 08-06-2009 by Behr]
Root
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Registered: 28th Dec 08
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8th Jun 09 at 12:16   View User's Profile U2U Member Reply With Quote

ok cheers.

By the main power cable, you mean the battery? (red cable)? Because that does go straight to battery. It's bolted on there.

Yer it comes from the amp to the battery

[Edited on 08-06-2009 by Root]
Behr
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8th Jun 09 at 12:17   View User's Profile U2U Member Reply With Quote

yeah that one does that have a fuse or black box anywhere on it, usually in the engine bay?
Root
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8th Jun 09 at 12:19   View User's Profile U2U Member Reply With Quote

Erm, nope. The only fuses I can see in the setup...there's one on this new amp and 2 on the old amp.

new = 25
old = 2x20

The red power cable from battery goes through a hole in the passengers footwell, under the carpet on passenger side and under the sill trims etc. to the boot. No fuses etc
Behr
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8th Jun 09 at 12:20   View User's Profile U2U Member Reply With Quote

ok cool and where does your ground wire go?
Root
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8th Jun 09 at 12:21   View User's Profile U2U Member Reply With Quote

Tbh mate, I havn't got the foggiest where the ground wire begins or where it ends up because I did not set the system up but if you help me (tell me where it's meant to start), I can trace it and tell you? lol
Behr
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Location: Hemel Hempstead
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8th Jun 09 at 12:22   View User's Profile U2U Member Reply With Quote

ah ok on the amp you should have 3 labeled connections, +12/remote/-12 or ground, what make and model is you amp so i can see what we are working with.
Root
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8th Jun 09 at 12:23   View User's Profile U2U Member Reply With Quote

On my amp...there are 4 connections for the subwoofer(s).

Then 3 other connections...red (battery) black (earth i should think), and blue (remote)...want me to chase the black wire? lol

It's not called -12 on the amp, just...GND

[Edited on 08-06-2009 by Root]
Root
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8th Jun 09 at 12:25   View User's Profile U2U Member Reply With Quote

brb, off to chase the black wire
Behr
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8th Jun 09 at 12:26   View User's Profile U2U Member Reply With Quote

cool
thats the one GND
Root
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8th Jun 09 at 12:32   View User's Profile U2U Member Reply With Quote

Right, now I'm more confused.

I found a black wire..but it doesn't match the one on my amp, the one on my amp is bronze coloured wire (lots of it), wrapped in black plastic, the one I found (under the rear passenger seat (goes down a hole under there), has lots of little different coloured wires wrapped in black tape.

I don't think the ground will be unground because it was done professionally I'm stumped

[Edited on 08-06-2009 by Root]
Behr
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8th Jun 09 at 12:39   View User's Profile U2U Member Reply With Quote

hmmmm ok thats part of your loom dont touch that. grab the black GND wire thats plugged into the amp and try and find the end of that.
Root
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8th Jun 09 at 12:40   View User's Profile U2U Member Reply With Quote

Okay, may have to take some plastics off, brb.

btw appreciate all the help so thanks
Behr
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8th Jun 09 at 12:40   View User's Profile U2U Member Reply With Quote

i mean with out a live tester you'll never know if power is even getting to the amp. i can talk you through making a live tester though there easy enough
Root
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8th Jun 09 at 13:03   View User's Profile U2U Member Reply With Quote

I'll add you to MSN matey.
Behr
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8th Jun 09 at 13:05   View User's Profile U2U Member Reply With Quote

im at work at the mo firewall wont let me on MSN
:S
Root
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8th Jun 09 at 13:07   View User's Profile U2U Member Reply With Quote

okay, np.

Well I just checked the ground mate. It's ground under the carpet in the boot...it's screwed down into the metal, so it's definitely earthed correctly...
Behr
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8th Jun 09 at 13:10   View User's Profile U2U Member Reply With Quote

okay your gunna need a live tester then.
to make one all you need is 2 bits of wire and your numberplate light unit
Root
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8th Jun 09 at 13:12   View User's Profile U2U Member Reply With Quote

lol, will 2-way coaxial wire do?
You do mean the rear-number plate light unit?

[Edited on 08-06-2009 by Root]
Behr
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8th Jun 09 at 13:14   View User's Profile U2U Member Reply With Quote

yeah thats fine, so what you want to do is pop tyour number plate light out and disconnect it, this should give you 2 like silver connection on he number plate light, seperate the wires and hook them up to these connecters
Behr
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Location: Hemel Hempstead
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8th Jun 09 at 13:15   View User's Profile U2U Member Reply With Quote

then test on the battery one wire to neg one to positive, if the bulb light up you got power
Root
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8th Jun 09 at 13:15   View User's Profile U2U Member Reply With Quote

okay matey, brb. Let me just do this
Behr
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8th Jun 09 at 13:15   View User's Profile U2U Member Reply With Quote

yeah rear number plate
Root
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8th Jun 09 at 13:18   View User's Profile U2U Member Reply With Quote

Why am I testing the battery for power? I know that is supplying power...
Behr
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8th Jun 09 at 13:19   View User's Profile U2U Member Reply With Quote

no just to check that the tester works as it should
when you put the cable on the battery +&- the bulb should light up

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