Larry@29936 0 Posted September 26, 2018 Share Posted September 26, 2018 I'd like to change my headlights to 85 watt EVO Lighting H13 bulbs. Will I need to put in a heavier duty headlight wiring harness on my 2013 Spark LS or will the factory harness handle it? Link to post Share on other sites
ChevyBeat 28 Posted September 27, 2018 Share Posted September 27, 2018 (edited) Hi Larry, why h13, I mean standard fitting is H4. Are these physical compatible? I mean can you put h13 bulb in H4 socket? Anyway, coming back to your point of wire. Although each manufacturer keep some design margin so upgrading to 85 from 60/55w H4 should not be a issue, this is what I got reply from many people when I was working out for fog lamp (mine projector low beam 60w, factory std 35w). I prefer to lay higher thickness wire to avoid any heating due to additional load I am putting. And better you go with automotive grade wire, these have thin insulation and high heat resistance. Edited September 27, 2018 by ChevyBeat Link to post Share on other sites
Larry@29936 0 Posted September 27, 2018 Author Share Posted September 27, 2018 3 hours ago, ChevyBeat said: Hi Larry, why h13, I mean standard fitting is H4. Are these physical compatible? I mean can you put h13 bulb in H4 socket? ChevyBeat, my owners manual calls for H13 bulbs. Link to post Share on other sites
ChevyBeat 28 Posted September 28, 2018 Share Posted September 28, 2018 Larry, pardon, as major vehicle I have seen are using H4 as headlight bulb, even bikes. So I was in that impression. Have you decided to upscale wiring harness? Link to post Share on other sites
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