Lights out in the Snow....

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shame the boomslang doesn’t specify in the notes that the positive lead may be short with fenders

Never heard anyone say this before...perhaps you were not stretching it enuff.......LOL

As I said before, I made my own, using 27 Amp wire for all the runs.

Cheers
 
I wondered, if that was what they had written or if they had it going to where another 12V supply was in the engine bay, like the starter or Alternator.

Cheers

they only showed the battery as a connection
 
they only showed the battery as a connection
If you have an alternator that uses studs rather than a plug the you could connect direct to that as the main connector goes straight back to the battery (and will have a lot better current rating than any additional wire you would have used). make sure you leave sufficient slack for engine movement, avoid rotating parts and hot exhaust etc
 
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If you have an alternator that uses studs rather than a plug the you could connect direct to that as the main connector goes straight back to the battery (and will have a lot better current rating than any additional wire you would have used). make sure you leave sufficient slack for engine movement, avoid rotating parts and hot exhaust etc

don’t want to start messing around with the alternator connections , if i’m being honest i can’t see it making any difference anyway if i connected it at the alternator or battery , but thks anyway of the idea

still got to get round fitting my split charge system in my D3 , now that is going to be fun, lol
 
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@gstuart did you buy that wire from 12 Volt Planet? I've got 4m in the basket, but you were undecided about it.

no not yet , i looked and the boomslang loom already has a 40 amp fuse fitted so the 50 amp wire should be fine

can’t see there being any reason to go bigger than the 50amp, but will let u know once i’ve double checked everything in what size cable

second opinion plse @neilly , ref the cable amperage , 50 amp should be fine don’t u think, seeing there is already a 40 amp fuse fitted on the boomslang , thks buddy
 
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@gstuart

the calculator on this page should help you work out the cable size you need for the Amps required and length you are going to use. I used 2 approx 5 mtr lengths of 27 Amp 2.5mm wire ( 1 to each set of fuses / relays / bulbs).
https://www.12voltplanet.co.uk/cable-sizing-selection.html

Cheers

bless u for that , i always like to double and triple check things

just been reading the boomslang tech details and will go through that link to work it out

ie, 6mm cable, 50 amp rating and 4 m

TECHNICAL SPECIFICATIONS:

• Continuous Current 40A (fuse)
• Max Relay Current 40A x2
• Connect Voltage 11.8 – 14.5VDC
• STBY Current <5mA (12VDC)
• Weight 450 grams
• Operational temperature range -40°C to 85°C
 
@gstuart

the calculator on this page should help you work out the cable size you need for the Amps required and length you are going to use. I used 2 approx 5 mtr lengths of 27 Amp 2.5mm wire ( 1 to each set of fuses / relays / bulbs).
https://www.12voltplanet.co.uk/cable-sizing-selection.html

Cheers
That's interesting. Can someone check these calcs or correct if you already know.
Assuming headlight @ 60w and 12v Power=VxI so I = 60÷12 = 5A
assuming sidelight @ 5w and 12v = 0.42A

Soooooo, 5+5+0.42+0.42 = 10.84A max current draw

I put 12A in to that calculator on a run of 4m and get a voltage drop of 0.27v which is 2.25% and within the acceptable 3-4% The return run to the earth should be less than 4m, so well under.
Does that sound about right? If so, why does the harness have 40A fuses?
 
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