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DSPTurtle DSPTurtle is offline
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Join Date: Jul 2001
Location: Suntree, Florida, USA
Posts: 2,265
Red has a diode that only allows electricity to flow one direction. A black can be replaced with a red but a red cannot be replaced with a black. If you buy spares, only buy reds since they can be used anywhere.
Yes, two closest to the windshield.
If you want more details like schematics and such, use the search function and type "red relay". You will have hours of reading as these little puppies have been discussed ad nauseam. Reds always work, blacks will only work to replace blacks.
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Old 12-20-2014, 04:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)