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positive to negative trigger 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=106790
Printed Date: July 07, 2025 at 11:24 AM


Topic: positive to negative trigger relay

Posted By: bkdlays
Subject: positive to negative trigger relay
Date Posted: August 14, 2008 at 11:15 PM

Ok I am rewiring a headlight switch in a cavalier

There is a break somewhere in between the switch and the lights..via some hidden relays for daytime running lights and all that

I decided its easier to just rewire it.

The factory headlight switch has a negative output.

I am wiring the relay as a negative trigger.. So my layout is 86/30= 12+ 85= - Trigger and 87 for the + output..

Heres the question.. the headlight switch rests at 12+ when off. So when the lights are off the 85 terminal will be energized by 12+

This shouldn't matter should it? Its been a while and I just can't decide on my own.

Thanks for reading!



Replies:

Posted By: bkdlays
Date Posted: August 14, 2008 at 11:23 PM
Also do you think its okay to run 2 headlights off 1 relay?



Posted By: hotwaterwizard
Date Posted: August 15, 2008 at 9:12 PM

Sounds good

I would run one relay for each light.

If one relay fails you still have a light to drive with.



-------------
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !


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