Isolated switched 12V source

[Cudakiller70]

Sorry if this is a dumb electrical question, but I just don't have the knowledge and experience yet. Installing a Wideband, instructions call for isolated switched 12V source. They say if in doubt create an additional circuit using a relay. Is there some where in the cars wiring harness I can tie in or do I need a relay?

For ground they say best possible ground source is negative battery post. Do I really need to go there or just look for a good ground?

[RUNCHARGER]

I believe I wired my wideband right off the factory fuse box.

[Cudakiller70]

Did you plug into the single acc plug at the bottom? What is the purpose of these connection points?

[RUNCHARGER]

Yes, that's what that is for. Run an inline fuse as soon as possible.

[Cudakiller70]

Excellent thank you!

[FSHTAIL]

Great info.     Saved me from starting a new topic. 

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