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What is a Relay and why do I need it?

2013-12-05 18:55:42

What is a Relay and why do I need it?
 
A relay is used for certain vehicles with daytime running lights or to simply pull power from your battery. This will accomplish two advantages. One advantage is bypassing the issue of problems that may occur between your E.C.U and your headlights. Another advantage is having more consistent power to the hid since the power is coming directly from the power source.

Then how will I know if I need a Relay?
 
You will know if you have daytime running lights if you need either or both. If you have a computerized headlight system you will need a canceler. If you do not but you have daytime running lights, you will need a relay.

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