Relay Working In Reverse

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=49503
Printed Date: July 15, 2025 at 1:05 AM

Topic: Relay Working In Reverse

Posted By: Clatch
Subject: Relay Working In Reverse
Date Posted: February 06, 2005 at 7:25 PM

Ok, I put in a white neon as the cabin lights, so it will function just like the foot well cabin light, when the door opens, the neon comes on, and when the door closes the neon shuts off. Then I wanted the neon to come on after I turned over the key (I have a toggle switch on it to turn it off manually), essentially just like the radio or cigarette lighter. So I fabbed up a harness just like the one in the picture below. It works, but the door switch relay works in reverse, i.e. the neon turns off when the door is open, and it turns on when the door is closed. How do I reverse this? Also I have a negative door switch, i.e. 1993 Nissan 240SX. posted_image

Replies:

Posted By: auex
Date Posted: February 06, 2005 at 8:27 PM

Do you see on your diagram where it is listed as Switch+? Your door is negative. So you need to change pin 85 to +12V and 86 to switch-. You will also need to change your toggle switch to - as well.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: hotwaterwizard
Date Posted: February 06, 2005 at 8:58 PM

posted_image

Why not use one relay?

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

Posted By: Clatch
Date Posted: February 07, 2005 at 11:39 AM

auex]D wrote:

you see on your diagram where it is listed as Switch+? Your door is negative. So you need to change pin 85 to +12V and 86 to switch-. You will also need to change your toggle switch to - as well.

Thanks, that did the trick, for some reason I kept accounting for the negative door switch as a positive door switch.