2010 honda civic headlight relay location

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=135304
Printed Date: April 18, 2024 at 3:56 PM

Topic: 2010 honda civic headlight relay location

Posted By: jenom
Subject: 2010 honda civic headlight relay location
Date Posted: November 17, 2013 at 8:33 AM

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!

Replies:

Posted By: Velocity Motors
Date Posted: November 19, 2013 at 7:26 PM

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.

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: jenom
Date Posted: November 19, 2013 at 7:44 PM

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!

Posted By: Velocity Motors
Date Posted: November 19, 2013 at 7:53 PM

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

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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: Velocity Motors
Date Posted: November 19, 2013 at 7:53 PM

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

Posted By: jenom
Date Posted: November 20, 2013 at 7:44 AM

thanks for the very helpful info,

this should get my project started

Thanks again all the replies !