wiring polarity to plug

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KaMLuNg

Copper - Posts: 70

Joined: May 28, 2003

Location: United States

Posted: December 09, 2005 at 7:03 PM / IP Logged

i am trying to hard wire my radar detector but do not want to hack up the cig lighter since im going to leave it in my other car... i have a few universal plugs left over from a plug i bought for my speakers... i want to make sure im wiring the leads correctly...

the rear one is a little longer than the inner one (right one)... the longer one should be positive... please verify... here is pic...

wiring polarity to plug -- posted image.

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menace2sobriety

Silver - Posts: 394

Joined: October 29, 2005

Location: United States

Posted: December 09, 2005 at 8:31 PM / IP Logged

usually the inner one is the + why not check it with a dmm and be sure about it.

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KaMLuNg

Copper - Posts: 70

Joined: May 28, 2003

Location: United States

Posted: December 09, 2005 at 9:10 PM / IP Logged

how do i do it with a meter?

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Hornshockey

Silver - Posts: 520

Joined: January 31, 2005

Location: Texas, United States

Posted: December 09, 2005 at 9:55 PM / IP Logged

check continuity between the plug and the pins; generally the outer surface of a plug like that is negative. Same goes for a cig lighter plug.

Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

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wiring polarity to plug

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