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98 gtp: left turn signal wiring schematic

Printed From: the12volt.com
Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131875
Printed Date: May 14, 2025 at 10:52 AM


Topic: 98 gtp: left turn signal wiring schematic

Posted By: fst100
Subject: 98 gtp: left turn signal wiring schematic
Date Posted: July 23, 2012 at 6:14 PM

i need to know what color wire is for the left turn signal on a 1998 pontiac grand prix gtp. it would be the wire that comes from the steering column and plugs into a large connector underneath the console. thanks in advance.



Replies:

Posted By: i am an idiot
Date Posted: July 23, 2012 at 8:52 PM
Why are you looking for this wire?




Posted By: fst100
Date Posted: July 24, 2012 at 5:12 AM
currently the wire is loose where it goes into the large black connector underneath the dash. i got to jiggle/move the wires around to get it to blink when i turn the left turn signal on. its a crash waiting to happen if i dont get this fixed.




Posted By: itsyuk
Date Posted: July 24, 2012 at 6:37 PM
does this help?posted_image

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yuk
quiet rural missouri, near KC.
If your system moves you physically and not emotionally, you have wasted your money.




Posted By: fst100
Date Posted: July 24, 2012 at 7:58 PM
thx itsyuk...i dont know yet....trying to decipher what wires go where from the left turn diagram lol




Posted By: oldspark
Date Posted: July 25, 2012 at 2:20 AM
LOL! The complexities of combined rear stop/flasher (or flasher/reverse).
Some people replicate similar for front flashers -cum- parkers or running lights.




Posted By: howie ll
Date Posted: July 25, 2012 at 3:31 AM
Light blue 14 oh those stupid US systems with combined indicators stop lights.
Why can't you have separate AMBER indicators like the bloody rest of the world.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.




Posted By: oldspark
Date Posted: July 25, 2012 at 3:47 AM
Nah - production costs!
Besides, they make more money that way (maintenance, spares, aftermarket etc).

I used to hate them but recently I have occasionally liked them.


Alas my only interest (and hence knowledge) on that issue comes from having newer steering-column switchgear on older vehicles without (in our case) the separate reverse lights (hence my flashers and reverse are combined). That switching was done by the old column switches.   

However, it has resurfaced again with my intention to use the side flashers or front flashers as clearance or DRLs, or to turn off the front flasher/parker twin-filament's parker/DRL when flashing on that side.
But I have tentatively decided to use a PICs to control SPST relays, or to PWM single bulbs or LED-lights between intensities.

But I do like the various solutions I see posted. If it doesn't involve a time delay else use a DPDT switch/relay per side (or rather, 1xSPDT and 1xSPST), then it won't work (except for PICs etc else complex circuitry).

If only a J-FET could pass enough bulb current. Then it would be easy!!
PS - a J-FET is normally on - it will normally pass current thru itself. It requires a voltage to turn it off. Hence a simple "in principle" solution - the reverse (or stop) current goes normally thru the JFET to the light. The flasher signal turns it off. (That's out of phase, but that has workarounds.)




Posted By: fst100
Date Posted: July 25, 2012 at 5:11 AM
so can someone tell me what color is the left turn signal wire that goes from the steering column to a connector harness please?




Posted By: howie ll
Date Posted: July 25, 2012 at 5:27 AM
I've told you one already but here's both AGAIN.
Front light blue at pin 14.
Rear yellow at pin 18.

-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.




Posted By: howie ll
Date Posted: July 25, 2012 at 5:30 AM
Now here's a piece of practical advice, 2 in fact:-
Pull the lower plug, apply meths or proprietory contact cleaner, push all the terminals home, both sides and reconnect.
Learn to read a circuit diagram, thanking itsyuk or buy a test light (you don't need a DMM for this vehicle) and learn to use it.


-------------
Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.





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