headlight wiring with relay
Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=94229
Printed Date: June 01, 2024 at 9:18 PM
Topic: headlight wiring with relay
Posted By: exempt
Subject: headlight wiring with relay
Date Posted: May 24, 2007 at 10:49 PM
Hello,
I am having a problem with some custom wiring in my car... The problem is with the OEM wiring it has 2 different bulbs... One high, one low... Well I put in a new set of headlights that only have one bulb with both functions (dual filament)... This new bulb is essentially the same wiring as an H4 (its actually a Japanese H4H bulb)... Well the way I have it wired now is I cut off both connectors on my stock wiring, and spliced the single connector on... Everything works and functions, but the problem is both filaments are lit up at the same time so its over heating the bulbs and melting the connectors...
So what I need to figure out, and what I hope you guys can help me with is a simple schematic so I can wire in a relay that when I turn on my high beams, it turns off the low beam wire... Basically now its got 3 wires, a common ground, a + for the highs and one for the lows... It should be a simple circuit, but for the life of me I cant figure it out... Any help is appreciated...
Replies:
Posted By: exempt
Date Posted: May 24, 2007 at 10:51 PM
I meant to say that they are both lit when the high beams are on... When the high beams are off, only the low beams are on... Hope that made sense...
Posted By: hotwaterwizard
Date Posted: May 25, 2007 at 12:18 AM
 ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: hotwaterwizard
Date Posted: May 25, 2007 at 12:27 AM
If you want one relay for each light you could mount a relay on each side near the Headlight. 
------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
Posted By: exempt
Date Posted: May 25, 2007 at 12:39 AM
Awesome thanks... Exactly what I was looking for!
Posted By: hotwaterwizard
Date Posted: May 25, 2007 at 8:50 AM
 ------------- John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !
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