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kyngfish kyngfish is offline
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Join Date: Sep 2015
Location: Lake Oswego, OR
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H4 Headlight Relays for Dummies

Hi all,

Can anyone point me in the right direction to installing relays for my new H4s? I assumed they were plug and play, but reading through old threads, the consensus seems to say I should install relays.

Assuming I know pretty much nothing about how car electronics work, aside from basic circuit principals like power and ground, can someone point me to where I can get a quick education? (For example, I have no idea what a relay is or what it does).

Also, how dangerous is it to run the lights without relays in the interim, while I figure all of this out? Do I need to put the sugar scoops back in?

Thanks,
Martin
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1986 Carrera Coupe - 1987 W124 300E - 1999 Land Cruiser 100 - 2021 GLA250
Old 08-08-2016, 01:02 PM
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