TR factory wiring and General info thread including Concert Sound 2

[garyk1970]

stereo; Delco 1.5 din ( roughly 3.5'' x 7'').

removal;
I use a right angle heavy duty pic,and slowly start to unsnap the bezel around the back edge carefully not to fully unsnap at first (ive found that if you fully unsnap one side before the other,the bezel binds making it harder to remove). remove bezel, you will find four 7mm screws securing the stereo. slide out stereo,unplug harness by pushing on tabs.dont worry on re-installing,the plugs are "keyed" so you cannot plug them in wrong.also, this is a good time to check the radio cavity on both right and left sides for lost clips.i use a magnet to remove/find as they are hard to see.

wiring info;

black two pin plug;
orange = memory/battery
brown = park lamps (illumination)

black four pin plug; main power.
yellow = ignition +
black = ground -
grey = illumination dimmer
pink = power ant control (if equipted)

white/clear four pin plug; front speakers.
tan = LF+
grey = LF-
lt green = RF+
dk green = RF-

blue four pin plug; rear speakers.
brown = LR+
yellow = LR-
dk blue = RR+
lt blue = RR-

Concert Sound 2 harness and info;

CS2 includes the following in additon to above;
1) usually an eq upgraded radio.
2) 5 1/4'' door speakers 10ohm.
3) 3 1/2'' dash speakers changed to 10ohm also.
4) harness added for door speakers and special "Y" harness to wire all front speakers parallel at the stereo. this makes 5ohm load per channel at stereo.
note; CS2 harness is color coded the same as dash speakers,but the plug is blue like the rear speakers. if repairing harness,check the color code of the wiring,not the plug color,so the plugs are assembled correctally at the "Y" harness.

dash speaker removal/info.
1) remove 9 #15 torq screws at the top of panel. (when reinstalling,i leave somewhat loose so dash can expand /contract with tempurature helping eliminate the possiblity of cracking).
2)remove two 7mm or phillips screws. 3 1/2 4ohm non-CS, 10ohm CS2speaker.

rear deck speakers.
1) held in by a brackets.unsnap from retainer,other side will slide out of body. unplug harness. 4x10 size. 6x9 can be added with special adaptors.

CS2 speakers;
remove lower door panels and the speakers are mounted to door with special plasic housings. four 7mm or 1/4' screws. 5 1/4 10 ohm


speaker upgrade notes;

1) nothing special on the rears ( 4ohm) ,just pay attention to the polarity(dark colors are positive).if one speaker is wiried wrong,you will loose most of the bass.

2) upgrading the front speakers, non-CS2;
same as #1. observe the front color code for correct wiring.

3) CS2 speaker replacement;
heres where it gets tricky. most if not all aftermarket speakers are 4 ohm. one set on a delco or aftermarket stereo is perfect. but two sets wiried in the factory CS2 harness parallel will put a 2ohm load on each front channel of the radio which sooner or later will harm/destroy the radio.
if you replace the CS2 speakers, you need to rewire the fronts in series (raising the ohm load to 8 ohms) in order to be safe and not over heat ,burn up the stereo.i will make a diagram of how i usually do this as soon as i can and post it up.

[garyk1970]

trouble shooting;

1) radio wont come on.
check RDO (10a red)ign, and cig/dome (20a yellow) battery/memory fuses in fuse block. still not on, pull stereo verifying battery,ign,ground at the rear of radio. if all good,replace radio.also, Ive seen numerous power buttons (if equip)go bad.if you choose,you can connect the two red wires off the switch together,bypassing the button.

2) no sound; check speaker outputs (at stereo)for short to ground,incorrect ohm load, shorted bad speakers and/or wiring.if you don't have an ohm meter dig volt meter,try plugging up one speaker harness up at a time to see if theres a short.

3) speakers "rattling", sounding bad. the Gm speakers then and now are paper cone.(CS2 door speakers were poly coated) and over time they deteriorate.replace.

4) my power ant wont go up.
check for remote out at stereo (pink+, or single black plug).
check dome/cig fuse.
check relay above the computer behind the glove box.

5) when replacing OEM equipment i use;

dash kit; Best kits # bkgmk434 this kit mounts flush,looks very good.
harness; Best kits harness adapter # bha16771
4x10 to 6x9 adapters; AI (American international) # sa-41069-gm. closely follow directions,there is a left and right adaptor...

3 1/2 dash speaker; any good name brand. choose a speaker that has a low profile tweet,or mount speaker from under the opening for extra clearance.

4x10; pioneer still makes the best one here IMHO. or add 6x9 with adapters.watch magnet size for clearance of the trunk helper tension rods.

5 1/4; good name brand,watch magnet size. go with a smaller wattage if using radio power.lower wattage stereos will drive high sensitivity speakers better (don't buy high power speakers and drive them with radio power,you'll be disappointed unless you plan on adding an amp later).

[Boost231]

great info. this should be a stickey

[garyk1970]

Originally Posted by Boost231

great info. this should be a stickey

thanks, this is all off the top of my head so,if anyone has anything to add or ask, please do.......

[Evans Ward]

Gary,

Thank you for posting this as it will be very helpful to me when I install the Sony CD player I bought from a member here. This is it here:

Sony CD Radio for 87 GN

It comes with the harness too so that nothing needs modification (supposedly). Hope it will be pug n play for my system which has concert sound (6 speakers). Gary- after looking at it in the pic, is everything pretty much there for my easy install? Haven't received it yet with payment enroute to member here.

[garyk1970]

hey Evans, if you have OEM speakers you're golden....

[Evans Ward]

Originally Posted by garyk1970

hey Evans, if you have OEM speakers you're golden....

I have Polk all the way around in the stock front and door sizes but the 6 X 9 rear upgrade with the Metra adapters. Hope I'm still golden?

[garyk1970]

the stereo needs to "see" 4ohm or higher. what radio is in now? playing ok?

[scot w.]

Good info Gary!

Stereo is in and works good. Now it's speaker time!!!

Scot W.

[Evans Ward]

Originally Posted by garyk1970

the stereo needs to "see" 4ohm or higher. what radio is in now? playing ok?

Stock radio/ cassette player with 5 band EQ is presently in car and playing fine. Polk speakers were a huge upgrade over stock speakers. Just wanted the CD upgrade. In theory, it should sound better with the Sony CD unit.

[O SO LO]

Thanks for the good info, Gary!! I also think this should be a sticky!!