speedyxjs
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| posted on 11/8/09 at 06:18 AM |
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Wiring
I still havnt got round to starting the wiring but dont have any money to spend so am finishing off the jobs i have been putting off.
I have a fuse box and have ordered a relay box but dont know where they go in the loom.
Is it switch - relay - fuse - item?
How long can i resist the temptation to drop a V8 in?
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flak monkey
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| posted on 11/8/09 at 06:22 AM |
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For your circuits using a relay the fuse needs to be after the relay otherwise you arent providing any protection to that circuit on the high current
side.
So yes you are right
switch > relay > fuse > item
If you arent using a relay it doesnt matter whether the fuse is before or after the switch.
David
Sera
http://www.motosera.com
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wilkingj
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| posted on 11/8/09 at 07:54 AM |
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I would fuse all feeds to the switches.
Not individually, but say a single fuse for all the lighting, and one for the accessories, and one for the ignition and fuel pump. sort of thing.
ie
for the relay operate circuit
its Fuse Switch Relay.
Then the power feed to the relay (say its a headlight relay)
Fuse Relay bulb.
I say this as ALL circuits ought to be fused, and the fuses should be after the battery.
This is purely to prevent wiring fires where it may rub through or be shorted out.
I think in modern cars not every circuit if fused. However, I would rather replace a fuse than burnt out wiring.
Make sure your fuses protect everything, and not just the device (Bulb, pump etc) on the end of the circuit. After all thats what fuses are for.
Thats why the fuse box is almost directly after the battery (wiring wise).
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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NeilP
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| posted on 11/8/09 at 09:51 AM |
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The low current side of the relay doesn't need to be fused but it's good practice to fuse everything as Geoff suggests. Easy to do this
on a group basis for some circuits (i.e. one fuse protecting the 12v low current feed to all of the lighting switches) and then have single main fuse
before each relay on the high current side (to protect the relay as well as the device it's feeding).
HTH
If you pay peanuts...
Mentale, yar? Yar, mentale!
Drive it like you stole it!
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James
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| posted on 11/8/09 at 10:19 AM |
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Save up 100 quid and make your life easy with a Premier Loom!
Or, with the time you'll save, earn £100.
It'll be way better in the long run!
Cheers,
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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speedyxjs
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| posted on 11/8/09 at 10:47 AM |
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To save 100 pounds at the moment seems it would take forever 
How long can i resist the temptation to drop a V8 in?
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