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2010 honda civic headlight relay location


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jenom 
Member - Posts: 3
Member spacespace
Joined: January 27, 2008
Location: Ontario, Canada
Posted: November 17, 2013 at 8:33 AM / IP Logged  

I want to make my wife's 2010 Honda Civic a little more idiot proof, so the headlight will not stay on when engine not running

My plan is to find a HEADLIGHT RELAY, and disconnec one side of its coil from the constant 12 v and connect it to the ignition 12 v.

I believe the another side of the relays coil is connects to ground when lightswitch  turned on.

Found 11 relays in the engine's comparment fuse box, and they are very poorly identified on the box cover.

Some looks like a fan blade, others like a snowflake, a 6 of them looks like open book pages.

Can somebody tell me, which one is the headlight relay ?

Is there any way to get under the relay socket to the bottom of the box?

Where can I find the nearest ignition 12 v wire?

Thanks!

Velocity Motors 
Moderator - Posts: 12,487
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: November 19, 2013 at 7:26 PM / IP Logged  
Why dont you run a relay at the headlights switch instead ? Break the connection of the relay when ignition is OFF. You will need to do this for the park lights as well since it doesn't help if the park lights stay on but the headlights go off.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
jenom 
Member - Posts: 3
Member spacespace
Joined: January 27, 2008
Location: Ontario, Canada
Posted: November 19, 2013 at 7:44 PM / IP Logged  

thank for the info

it seems like there is no headlight relay in the engine fusebox :-(

headlight turn on/off  now is part of the multiplex unit (MICU) behind the underdash fuse panel....I will not touch it !

as you suggested , probaly the best to do is to interrupt a signal coming fromt the steering wheel's combination light switch and route it thru an additional relay which is controlled by the ignition ON voltage.....

yes, the parking light is also an issue, so instead of interrupting 2 outgoing lines with 2 relays, (or  with 1 relay with dual contacts), 

I might just interrupt the incoming ground line......because light switch sends out GND to activate any lights (Park/Low/High)

I would like to have a wiring diagram for the switch (wire colors), it would make my project much easier.

Anybody has 2010 Honda Civic wiring diagram ?

Thanks!

Velocity Motors 
Moderator - Posts: 12,487
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: November 19, 2013 at 7:53 PM / IP Logged  
All Parking Lights     RED     (+)     UNDER DASH FUSEBOX     F3
Low Current Parking Light Trigger     GRAY     (-)     UNDER DASH FUSEBOX     S13
All Hazard Lights     GREEN     (+)     UNDER DASH FUSEBOX     Q11
Low Beam Headlights     PINK     (-)     UNDER DASH FUSEBOX     S11
Brake Lights     LIGHT GREEN     (+)     SWITCH ABOVE BRAKE PEDAL ALSO AT UNDER DASH FUSEBOX PIN F30     
Reverse Lights     BROWN     (+)     UNDER DASH FUSEBOX MAY ALSO BE VIOLET
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Velocity Motors 
Moderator - Posts: 12,487
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
Posted: November 19, 2013 at 7:53 PM / IP Logged  
Those same wires for the light control are found at the headlight switch.
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
jenom 
Member - Posts: 3
Member spacespace
Joined: January 27, 2008
Location: Ontario, Canada
Posted: November 20, 2013 at 7:44 AM / IP Logged  

thanks for the very helpful info,

this should get my project started

Thanks again all the replies !


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