danny boyo
Member
Registered: 15th Nov 02
User status: Offline
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just bought some for my install and they have cigarette plugs on the end if i cut them off how do i know which is neg and which is pos? the cable is clear not black and red
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Wrighty
Member
Registered: 28th Feb 04
Location: Howden
User status: Offline
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doesnt matter,as long as ones lived and the others earthed
[Edited on 26-11-2005 by yzjon]
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Ally
Member
Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline
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The above is incorrect. Leds will only work one way.
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IntaCepta
Member
Registered: 25th Mar 02
Location: Mill Hill East, Greater London
User status: Offline
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surely you can use a battery to test it..?
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sxibeast
Member
Registered: 6th Aug 03
Location: Milton Keynes
User status: Offline
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use a voltmeter! However i believe the wire that connects to the fuse in the middle is positive. Strip down the plug and u will see 1 connected to the contacts on the side (-ve i believe) and positive at the fuse 
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Ally
Member
Registered: 2nd Jul 03
Location: Pontypool Drives: a Skoda
User status: Offline
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One of the wires usually has a small tracer to indicate positive but the rule with fag lighters is centre positive, outer clip negative.
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Rob_Corsa
Member
Registered: 4th Apr 02
Location: Derbyshire
User status: Offline
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just hang a 9v battery off them to find out which is positive/negative. It wont hurt them. You can tell which is leg is positive by looking inside the led itself but if you cant see which leg goes to which wire then that aint gonna help.
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