Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

The infamous isolator relay. 3 possible sollution?

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Old Jul 15, 2013 | 09:28 PM
  #1  
82z28 wrencher's Avatar
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Joined: Sep 2009
Posts: 150
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From: bloomington il
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
Axle/Gears: 10 bolt 3.73 factory
The infamous isolator relay. 3 possible sollution?

Ok on my 84 T/A my isolator relay just clicks when i hit the headlights so it bit the dust and o boy they dont make new ones

So after digging through TG.org a guy said he used a 87-92 actuator relay with some diods and it worked but no further info on how and the thread died

Then i did some digging and are ugly cousins the fiero seem too came up with the/a answer for use 82-86 birds
http://www.fiero.nl/forum/Forum1/HTML/088867.html
or http://www.fiero.nl/forum/Forum1/HTML/088867.html
i can kinda see how there are 3 possiblitys but idk which would be the best one

Option 1: Use a 87-92 actuator and 2 diods (diagram included)
Option 2: Hot wire it and delete the isolator relay (diagram included)
Option 3: Use 5 pin universal relay and matching plug, a inline fuse holder and a few crimp conectors

Now im not that good with wiring so im gunna ask the wiring gurus which would be the best solution? I know many of use are SOL when it comes to the isolator relay and finding a temp fix would be great!

Last edited by 82z28 wrencher; Jul 15, 2013 at 09:32 PM.
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Old Jul 16, 2013 | 11:21 AM
  #2  
TreeFiddy's Avatar
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Joined: Jun 2005
Posts: 1,380
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From: Sydney, Australia
Car: '86 TA
Engine: '74 350
Transmission: 700r4
Axle/Gears: 2.77
Re: The infamous isolator relay. 3 possible sollution?

I used option 3, standard 5-pin relay and a little rewiring. Has worked fine for years.
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Old Nov 4, 2013 | 03:35 PM
  #3  
BRJ's Avatar
BRJ
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Joined: Jan 2012
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Re: The infamous isolator relay. 3 possible sollution?

My wife had her isolation relay burn out on her 1986 Firebird. After months of research I put two years of electronics school to work and built a replacement. Watch it in action on
.

Working up the plans now and will post them in another thread soon.
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