Headlight harness upgrade
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Joined: Dec 2006
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Headlight harness upgrade
I'm in the process of building some new heavy duty headlight harnesses for my 01 F350 and was wondering.... I read on one of the vendor sites (one that sells the universal HD harness) that it is better to run an individual harness from each battery to its respective (same side) headlight on the Superduty specifically, therefore ensuring 14v per assembly. I just installed a pair of Matrix projector headlights with individual bulbs for high and low beam and want to upgrade the harnesses to ensure quality lighting. So my question is, can I run power directly from the positive terminal of the battery to a fuse block or do I have to use a switched source such as from the starter. In my mind the shorter run from the battery with a heavy gauge wire would be best and wouldn't be a big deal since I'll be using the factory harness to trigger the relays. I'm planning on installing one fuse block on each firewall along with circuit breakers...
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Joined: Jan 2001
Posts: 56,980
Likes: 2,735
From: Virginia
You do not want a switched source, you want power all the time directly from the battery. So wherever is more convienent to run the wiring, one battery or the other, that is what you can use so long as you do use a fuse, and it's not very far away so it will protect most of the new wire.
