1987 Supra TDS

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=62692
Printed Date: July 06, 2025 at 2:18 AM

Topic: 1987 Supra TDS

Posted By: ysheff
Subject: 1987 Supra TDS
Date Posted: September 14, 2005 at 5:30 PM

I'm about to install a Autopage RS855 LCD into a 1987 supra with the toyota theft deterrant system, it also has a starter kill relay.

I'm planning on just cutting the wires i need out of the wire harness to the factory alarm, and then running my own wires for whatever else i need.

Or would it be better to leave the alarm intact and have the rs855 bypass it? if so how do i do that

Thanks in advance

Replies:

Posted By: ysheff
Date Posted: September 14, 2005 at 5:31 PM

To be more clear, if using the wires out of the harness i would be disconnecting the factory alarm entirely

Posted By: mo12v
Date Posted: September 14, 2005 at 5:43 PM

If the Factory Alarm is working, why Unhook it??
Just hook in the RS855 to the Factory Arm & Disarm wires

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: ysheff
Date Posted: September 14, 2005 at 5:45 PM

Well i've been having problems with it going off just because it feels like it, and then my car not starting because it doesnt want to reset

Posted By: ysheff
Date Posted: September 14, 2005 at 5:49 PM

And i've been searching all over, can't seen to see anything about a disarm wire...

https://www.cygnusx1.net/supra/library/TSRM/be/BE_098.html

https://www.cygnusx1.net/supra/library/Wiring/pages/Page_122.html

Posted By: profuse007
Date Posted: September 15, 2005 at 12:01 AM

Posted By: ysheff
Date Posted: September 15, 2005 at 12:55 AM

I'm a freakin genius, i dunno how i didnt see that it's purple / YELLOW on the diagram right here on this website.

Anyways, its great to have another wiring diagram to check against, thanks for the help guys :)

The alarm should arrive tomorrow morning, so hopefully all will go well!

Posted By: ysheff
Date Posted: September 22, 2005 at 1:06 PM

Ok, so at first i grabbed the wrong blue/black wire for the doorlocks, i didn't realize there were to blue/blacks in the same harness, i grabbed the thick one, later fixed it to the skinny one.

Now i'm struggling to get the remote smart working, the transmitter just beeps at me, even though i've tried to program it for voltage check type, (havent hooked up tach yet) And there were a million green wires in the driver kick panel for the parking light, so i hooked it up to the green wire coming off the switch on my steering column. I can hear relays clicking on and off but no light, and my blinkers won't work at all anymore, won't flash or anything. The weird thing is my turn fuse is fine, could i have blown out the flasher module?

Purple / Red

Posted By: ysheff
Date Posted: September 22, 2005 at 1:08 PM

^ also the above diagram says the hood pin is yellow/black, the guide on this website says PURPLE / red

Posted By: mo12v
Date Posted: September 22, 2005 at 1:15 PM

YA can't beat a METER when your not sure...........

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MO

Don't Learn from Others Mistakes
You Might Be the One That Knows.

Posted By: ysheff
Date Posted: September 23, 2005 at 2:53 PM

Yeah, well i dont have one available at the moment, i'll buy one later today if i absolutely need to, but i'm getting alot closer to figuring it out.

https://www.cygnusx1.net/supra/library/Wiring/pages/Page_063.html

I tried wiring it to wire 14 in the upper right, and it did flash the lights, but kinda weird, and the horn honked too...

Posted By: ysheff
Date Posted: September 23, 2005 at 2:59 PM

Now that i think about it, wire 6 going fron 1F to E3 off the taillite fuse on page 62: https://www.cygnusx1.net/supra/library/Wiring/pages/Page_062.html

Posted By: ysheff
Date Posted: September 24, 2005 at 12:58 PM

Ok, i have a voltmeter now, but i'm still struggling with what to do, i had my father (electrical engineer, makes dmm's for a living) look at the wiring diagrams, and the car, we still could not locate a good parking light wire.