viper 500+ door lock issues

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=99558
Printed Date: May 09, 2025 at 10:36 AM

Topic: viper 500+ door lock issues

Posted By: scout238
Subject: viper 500+ door lock issues
Date Posted: December 01, 2007 at 4:24 PM

Car: 95 Tbird Coupe with stock power locks

Unit: Viper 500+ with 4 relays for the doors....

Here is the issue... Friend came to me saying the power door locks stopped working on the passenger side with the remote. A few months later the same thing but on the driver side. The switches still work. So with the remote basically nothing happens as far as door locks go, except SOMETIMES it will unlock only on the passenger side. I swapped the relays around and it changed doors... I was thinking relays were jacked but I have nothing to test them with me. Even after I moved the relays around, it still would not lock, it would only unlock. Again, sometimes it would try to unlock and sometimes it would do nothing. There are also 4 relays... which I was confused about because the install manual was saying it needs 2. So what do you guys think? Relays? Maybe the brain? I checked all the wiring and everything looked good... all butt connectors.

Any info would be greatly appreciated!! :)

Thanks guy,

Nathan

Replies:

Posted By: KarTuneMan
Date Posted: December 01, 2007 at 5:41 PM

The locks should be negative pulse....

LOCK

Pink / YELLOW

In driver's kickpanel

UNLOCK

Pink/green

In driver's kickpanel

Change pin 87 to ground.......

Posted By: KarTuneMan
Date Posted: December 01, 2007 at 5:44 PM

Sorry about the above post..... but you didn't say how you had them wired.

Posted By: scout238
Date Posted: December 01, 2007 at 6:12 PM

I didn't change any of the wiring, it was installed by a shop. It had worked before....

Posted By: techman93
Date Posted: December 01, 2007 at 7:26 PM

You may want to get 2 new relays that are 30/40amp rated and replace, and check fuse for power going to relays and check ground connections. I would trace to where the connections are made in vehicle to see if they are solidly made.

-------------
The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya

Posted By: scout238
Date Posted: December 01, 2007 at 7:27 PM

fuses check good. Do you know where I can get just the relays or will something easily found work fine? There is also 4 relays all together... not sure why though.

Posted By: scout238
Date Posted: December 06, 2007 at 6:36 PM

anyone have any thoughts on relays or brain? I got a call from my friend and now he is saying everything is mysteriously working.... posted_image