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12v wire?


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juicer 
Member - Posts: 1
Member spacespace
Joined: May 14, 2011
Location: Pennsylvania, United States
Posted: May 14, 2011 at 10:01 PM / IP Logged  
I am looking for a 12v wire(circuit) to tap into that is hot only when the high beams are on.  The tap will be used to switch a relay only and will have no amp draw.  The car is an 09 Dodge Challenger SRT-8 with factory HID.  Thanks in advance for your assistance.
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: May 15, 2011 at 10:40 AM / IP Logged  
H/lamp relay Unless you have a switching (ie 12V+, ground or multiplex) in the steering column loom
syl20rochon 
Copper - Posts: 298
Copper spacespace
Joined: October 16, 2009
Location: Ontario, Canada
Posted: May 15, 2011 at 7:06 PM / IP Logged  
I believe that the signal is multiplex at the switch. You see headlights needs a 1.2K resistor to ground to power up. I would go straight to the light bulb to tap my relay using a diode to isolate my relay from the headlight circuit.. FYI, a 30 amp relay's coil draws around 150mA to energies.
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howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: May 16, 2011 at 2:30 AM / IP Logged  
It is multiplex, headlight relay output

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