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Message: <blockquote data-quote="Mustanger" data-source="post: 1221996" data-attributes="member: 8886">Wires on 85 & 86 are the coil wires & go to a switched 12vdc source...this turns the coil on & turns it off.  Wires on "30" & 87A  are on a Normally Closed contact, and will be on when the relay is OFF.  if you put the wire on 87A over to 87 it will be on a Nomally Open contact & will only turn on when the relay coil is turned on!Note the wires on "30", 87 & 87A are all the 12 volt "hot" wire not the grounded wire! LOL...do not put both + & - 12 volts on those wires. I can't tell which is which without looking at the relay & testing with an Ohmmeter. I'd guess that Red is + to the Coil & Black is - to a ground. The Yellow & orange are most likely the contacts either NO or NC. Get an ohmmeter & test the Red & Black & look for a small value in ohms which would be the coil, maybe 10- 100 ohms.  The orange & yellow may have infinity resistance indicating an open contact....if they have 0 ohms they are the NC contact.IF my guess about the colors is correct.Also if the wires are different gauges the two smaller ones will be the coil & the two larger ones the contacts...</blockquote>