I'm just starting my wiring for my J15 and I'm going to custom build the loom myself.

Must wiring diagrams show the heavy duty cable going from the battery to the starter and then the alternator and then all the other live feeds come from the battery.

My question is, is it OK to provide all the additional live feeds from the alternator rather than run another cable from the battery?

Yes

I used the loom from my donor MX5 and that is battery, starter, alternator, fusebox. Only 1 cable off the battery.

Thanks to you both for the quick response.

better yet take it from the connection to the starter........

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Originally posted by ChrisJ15
I'm just starting my wiring for my J15 and I'm going to custom build the loom myself.

Must wiring diagrams show the heavy duty cable going from the battery to the starter and then the alternator and then all the other live feeds come from the battery.

My question is, is it OK to provide all the additional live feeds from the alternator rather than run another cable from the battery?

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quote:

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Originally posted by britishtrident


Might not a good idea to take feeds from alternator but you can connect the alternator to the battery side of the starter and connect the feed to the fuse box from that.

However it might be better to fit a holder for a 180 amp Mega Fuse in the engine bay connect the starter and fuse box to battery via the fuse.


Battery + -----> 180 amp Megai fuse -----> fusebox & starter



Mega fuse holder ebay link

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I've used these guys in the past www.polevolt.co.uk

They have some wiring diagrams for a rally car on their website http://www.polevolt.co.uk/acatalog/Wiring_Info.html

Some things aren't needed on a kit so can be left out but the diagrams are really easy to follow and you can buy all the bits off their site.

I used a highlighter and once each wire was run in I coloured in on the drawing then coloured the end once terminated. that way nothing gets missed