Switched Live Good Practice

An alchemy of sparks, copper wire and earth

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bmouthboyo
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Switched Live Good Practice

Post by bmouthboyo »

I am finding I keep having to hunt for switched lives. So far I need it for:

- Radio
- Tachometer
- Guages
- PAS

And now I need one for immobiliser on a GTI engine conversion. What is the neatest and best way to provide for all these? A small junction box? Relay?
I have an early van and can't find any spare spades on the back of the fuse box now.

Thanks
1983 Autosleeper Trooper - 1.8 Gti Conversion

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bigherb
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Re: Switched Live Good Practice

Post by bigherb »

I fitted an additional fusebox for accessories under the right side of the dash.

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bmouthboyo
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Re: Switched Live Good Practice

Post by bmouthboyo »

bigherb wrote:I fitted an additional fusebox for accessories under the right side of the dash.

Image

Looks like a neat solution. Where is the best place to pick up the switched live for a fuse box?
1983 Autosleeper Trooper - 1.8 Gti Conversion

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bigherb
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Re: Switched Live Good Practice

Post by bigherb »

bmouthboyo wrote: Where is the best place to pick up the switched live for a fuse box?
From the input side of fuse 11 or 12, if you are running heavy loads off the auxiliary fusebox supply it through a relay using the power supply to terminal 30 of the relay from the input side of fuse 7,8 or 9 and power from 11 or 12 to switch the relay.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

bmouthboyo
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Re: Switched Live Good Practice

Post by bmouthboyo »

bigherb wrote:
bmouthboyo wrote: Where is the best place to pick up the switched live for a fuse box?
From the input side of fuse 11 or 12, if you are running heavy loads off the auxiliary fusebox supply it through a relay using the power supply to terminal 30 of the relay from the input side of fuse 7,8 or 9 and power from 11 or 12 to switch the relay.

Yea I might go the relay route. Great idea making a backing plate so it will fit. Where did you get the spade connector earth fitting?
1983 Autosleeper Trooper - 1.8 Gti Conversion

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bigherb
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Re: Switched Live Good Practice

Post by bigherb »

bmouthboyo wrote: Where did you get the spade connector earth fitting?

From the top of an old ignition coil.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow

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ZsZ
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Re: Switched Live Good Practice

Post by ZsZ »

in DIN the black is the colour for the ignition live wire. I think you can pick any black wire and splice into it.
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1986 Multivan ex-Caravelle. Van since 2006, running mTDi 1Z since 2008 with Fiat Croma 1.9 TDid pump 2008-2019, custom pump since 2019
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937carrera
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Re: Switched Live Good Practice

Post by 937carrera »

You don't know if anyone has been messing with the wiring.

Best advice was earlier on, use a feed from fuse 7 to make the auxillary fusebox live (fuse 7 nominally being for accessories), using a relay if necessary
1981 RHD 2.0 Aircooled Leisuredrive project, CU engine
1990 RHD 1.9 Auto Sleeper with DF/DG engine

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