pioneer head unit question

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Detour

Member - Posts: 20

Joined: September 21, 2004

Location: United States

Posted: November 03, 2004 at 4:00 PM / IP Logged

I'm surrently wiring lights onto my car but I would like to use the stereo as a cut off switch. Which wire do I tap into on the headunit to only get power when the face is on?

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jeffchilcott

Platinum - Posts: 2,483

Joined: April 11, 2002

Location: United States

Posted: November 03, 2004 at 4:40 PM / IP Logged

your remote wire, but that wont supply enough current to run any lights. You will have to run a relay with a 12 volt source

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Detour

Member - Posts: 20

Joined: September 21, 2004

Location: United States

Posted: November 03, 2004 at 4:48 PM / IP Logged

What I was thinking of doing too was running the power wire from the fuse box to the toggle switch then to the head unit then to the lights. [fuse box] --> [toggle] --> [h.u] --> [lights] Dont know if that would change anything. And the lights are federal signal police issue wigwags if that matters.

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: November 03, 2004 at 4:55 PM / IP Logged

No, that's not a good idea. Chances are the lights will induce lots of noise into the power wire and thus into your HU. Plus, it is never a good idea to use a toggle switch for a load like lights that can draw significant current. Like Jeff suggested, your best bet is to use a relay and trigger it off the remote-on signal from the HU.

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Detour

Member - Posts: 20

Joined: September 21, 2004

Location: United States

Posted: November 03, 2004 at 8:02 PM / IP Logged

Even though they only use 10 amp loads?

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dpaton

Copper - Posts: 141

Joined: July 19, 2004

Location: United States

Posted: November 03, 2004 at 10:30 PM / IP Logged

10A is a lot of current. Most switches are only rated for 1 ro 2 or 3, mayve 5A on a good day. Anything over 1A really wants a relay to prevent arcing and to keep the current in the fat wires and contacts, not in the wimpy ones inside a switch.

-dave

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pioneer head unit question

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