abugarcias Posted August 23, 2010 Share Posted August 23, 2010 I'm installing an aux electric fan (never had one) and need a wire that is hot only when the ignition is on to control the relay which turns the fan on when it gets to a certain temp. What is a good wire to tap into under the hood for this, preferably near the battery and fuses? Detailed description of where it is would be great, pics would be awesome! Thanks. Link to comment Share on other sites More sharing options...
HOrnbrod Posted August 23, 2010 Share Posted August 23, 2010 Use a 1/4" male spade connector and plug it into an IGN switched 12V terminal on your interior fuse box. Run this IGN switched 12V wire to one side of a SPST NO (normally open) dash switch. I used an XJ rear window defrost dash switch. Run another wire from the other side of the switch through the firewall to one side your fan relay coil. Ground the other side of the coil. Link to comment Share on other sites More sharing options...
abugarcias Posted August 24, 2010 Author Share Posted August 24, 2010 Thanks Don this is exactly what I needed, did the trick perfectly. Now I won't overheat in stop and go traffic, crawling, and idling. Link to comment Share on other sites More sharing options...
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