Re: New Complete Wire Harness

Posted by HH56 On 2021/11/15 22:48:28
One reason is not all the circuits will need the amount of current 12 ga wire or even 14 can carry. Things like headlights and the main feed to the ammeter might benefit from a size larger although I think adding relays with a single larger feed and eliminating the several feet of smaller wire going thru the old switches would do just as well in providing more headlight brightness. Relays also remove the load from old and possibly worn switches. Other small filament bulbs, gauges, start command etc will typically require a comparatively small amount of current.

You are obviously free to do as you choose but one thing to keep in mind is some of the holes, spaces and clamps the loom goes thru are a bit restricted. If you make the loom out of consistently heavier wire -- even though modern wire might have a thinner insulation -- and it winds up much thicker and harder to bend than a stock loom you may have some issues both in routing and passing it thru the provided openings.

Here is a headlight relay circuit that works nicely. This was built for a 47 so those are the existing loom colors referenced. Relay coils connect to the original terminal strip and are operated by the headlight and dimmer switch while the 10ga wire and relay contacts carry the heavy load of the headlights.

Attach file:



jpg  HeadLight Relay1.jpg (88.38 KB)
209_619337b6362e7.jpg 1200X808 px

jpg  relay.jpg (93.32 KB)
209_6193385416293.jpg 1275X785 px

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