: complete removal of stock radio & replacement of new after market info / install



92stsblue
02-07-05, 01:24 AM
Cadillac Car Stereo Replacement

1990 - 1995 Cadillac Deville Stereo Replacement

By: Pepsi2185



Safety

Exercise caution when working around electronics and unless you are well versed in automotive electronics DO NOT USE A TEST LIGHT. Although many times it is harmless to use a test light, in only takes one poke to destroy a 5 thousand dollar body controller.

Identification

There are three systems in use for a Cadillac car stereo sound system. The first is the conventional as described in 85-89 deville. In the dash is the Cadillac car stereo and tape deck.

The second is the Cadillac car stereo controller is in the dash board and the sound system is amplified by a separate amplifier. It can also in rare occasions be a combination of controller amplified and separate amplifier. Meaning the Cadillac car stereo runs so many speakers and the amplifier will run the other. This system can either be interfaced into or totally bypassed.

The third is the Cadillac car stereo where the dash board unit is a display. All sound processing and amplification are done in a trunk mounted module either behind the rear seat or next to the power antenna. Interestingly enough the controller still uses the same harnesses as all 90-late nineties GMs just is in the trunk at the controller. Antenna, speaker leads and power connections must be connected here.

Tools

Socket set
Wire connections tools
Screwdrivers
Panel removing tools

Materials

Wiring harnesses
Dash kit
GM antenna adapter (prior to about 88 you will not need this)
Crimp caps or electrical tape



Procedure



First System
Look along the woodgrain trim piece around the Cadillac car stereo for two bolts along the upper edge, if they are there remove them, if not just remove the trim. Remove the Cadillac car stereo.

Remove the metal sleeve from the aftermarket radio with enclosed keys. Assemble the dash kit according to the dash kit instructions for the model year. You will need the dash kit piece which offsets the radio 1.5 or so inches beyond the point at which the old Cadillac car stereo sat and it will stick out a bit. Insert the ring into the dash kit assembly and bend back the appropriate metal tabs.

Connect aftermarket radio harness and wiring harness wires verbatim. Connect the bare ends together. Black to black, red to red and so on. There may be some that are not used such as orange with black etc. Tape those connections off. Don't forget the blue wire or the power antenna will not go up.

Plug in the harness to the aftermarket radio along with the antenna adapter and the dash harness and clip radio in to the metal sleeve. Install the radio into the opening and reinstall the trim ring.



Second System
Remove the dashboard surrounding the Cadillac car stereo. Eldorado's and STS's remove the ring around the radio, pull up on the woodgrain around the shifter and remove the screws that may be below the radio. Be careful, yes its real wood! Remove the metal sleeve from the aftermarket radio with enclosed keys. Assemble the dash kit according to the dash kit instructions for the model year. You will need to figure out if the system is completely amplified or partially amplified. Most of the time it is just the four channels on the amplifier.

Normal amplified All four channels are run by amplifier. With your harness to incorporate into the factory system, get power, ground, ignition, illumination, and power antenna/amplifier lead from here.


Constant (yellow)
Turn on (Red)
Ground (Black)
Power antenna/amplifier turn on (Blue)
Illumination (orange)


The four channels have to have a low level signal put into them. Instead of directly connecting the purple, green, white, grey and purple/black, green/black, white/black, grey/black to the speakers you have to either connect the RCA's behind the radio to the input of the amplifier as a low signal input. Or you need to use a premium sound interface. Bear in mind without the adjustable interface you will get a popping noise as you change channels and sources. Either the the two front speaker in inputs share a negative signal and the rear speakers share a signal ground or have separate positive and negative signal inputs. If you look at the harness coming into the radio and there are:

brown/yellow - left rear - green green/black
drk blue/blue - right rear - purple purple/black
green/lt green - front right - grey grey/black
tan/grey lining up - front left - white white/black

If the harness lines up as above you will have separate low signal positive and negative. If you have the factory harness with a naked wire with shielding over it in between two wires you have the shared ground system. Connect the positive wires to their respective colors in the harness for positive, but either share the negative or have a separate negative. You will need to compare your harness to the vehicle plug to tell which negative to go to. Example. Grey is front right and white is front left. Either grey with black or white with black is going to the be the negative signal lead for both front speakers. Same for the rears. Connect your harness, length of wire and aftermarket radio harness all together matching colors verbatim. Just make sure you connect the input signal properly. Make sure you connect the blue wire at the harness or the amplifier will not turn on.


Combination For those of you with the lucky combination system, you will either have to connect the system half low signal input as described in the amplified section of system 2, or completely rewire the stereo in the vehicle. If you wish to rewire, watch your ohm load. New stereos can only handle two ohms. Speakers are as follows:

brown/yellow - left rear - green green/black
drk blue/blue - right rear - purple purple/black
green/lt green - front right - grey grey/black
tan/grey lining up - front left - white white/black

where brown, drk blue, green, tan, is positive - green, purple, grey, white is positive

Subwoofer Systems If you have some of the newer systems with subwoofers, it will take some testing with a 1.5 volt alkaline battery, low voltage input into the wiring harness and 12 volts to turn on the subwoofer amplifier. Sometimes the subwoofer input is connected in with the other four channels but most of the time it will have its own separate plug behind the head unit.



Third System
Remove the dashboard surrounding the Cadillac car stereo. Cadillac Eldorado's and Cadillac STS 's remove the ring around the radio, pull up on the woodgrain around the shifter and remove the screws that may be below the radio. Be careful, yes its real wood! Remove the metal sleeve from the aftermarket radio with enclosed keys. Assemble the dash kit according to the dash kit instructions for the model year. The kit may take some custom work as these kits are rare and a supplement is sometimes needed.

Nonamplified system - Run the wires from the controller box located either behind the power antenna or behind the rear seat behind the control center. It is the box that has a coaxial cable coming into it. Usually you can trace the speaker wires to the box. Plug in your GM harness and run the wires to the front of the vehicle.

This system simply requires you to lengthen all of the wires 20 feet longer. Except for ground which you can connect to solid metal in the dashboard area. Grounds are very important, make sure your connection is a secure ground.


Antenna
Constant (yellow)
Turn on (Red)
Power antenna (Blue)
Purple and stripe, green and stripe, white and stripe, grey and stripe (all speakers)

Connect the wires from the aftermarket radio harness to the vehicle harness adapter verbatim including the extension to lengthen the wire. Tape the bundle every so many inches for strength.

Amplified system - Run the wires from the controller box located either behind the power antenna or behind the rear seat behind the control center. It is the box that has a coaxial cable coming into it. Usually you can trace the speaker wires to the box. Plug in your GM harness and run the wires to the front of the vehicle.

This system simply requires you to lengthen all of the wires 20 feet longer. Except for ground which you can connect to solid metal in the dashboard area. Grounds are very important, make sure your connection is a secure ground. The only change is instead of directly connecting the purple, green, white, grey and purple/black, green/black, white/black, grey/black to the speakers you have to either connect the RCA's behind the radio to the input of the amplifier as a low signal input. Or you need to use a premium sound interface. Bear in mind without the adjustable interface you will get a popping noise as you change channels and sources. The two front speaker in inputs share a negative signal and the rear speakers share a signal ground. Connect the positive wires to their respective colors in the harness for positive, but share the negative. You will need to compare your harness to the vehicle plug to tell which negative to go to. Example. Grey is front right and white is front left. Either grey with black or white with black is going to the be the negative signal lead for both front speakers. Same for the rears. Connect your harness, length of wire and aftermarket radio harness all together matching colors verbatim. Just make sure you connect the input signal properly. Make sure you connect the blue wire at the harness or the amplifier will not turn on.
Antenna
Constant (yellow)
Turn on (Red)
Power antenna and amplifier (Blue)

In either system, run the extension harness up front to behind the dash where the radio will go. Assemble the kit and put the radio in the kit. Plug in the radio and test. It may take some custom work to the get the radio to sit right and a little tacky window sealer to hold the Cadillac car stereo trim ring into place.



NOTE: This is in no way a cut and dry install. This is a bit of a complicated install and may be a challenge for one not acquainted with electronic cadillac car stereo systems. The cadillac car stereo kit will take some creativity and custom work with a regular GM kit

D148L0
02-07-05, 11:34 AM
Good post!
Thanks, 92.

90Brougham350
02-07-05, 05:13 PM
Hot damn! Where did you get this? Is there a guide like this for 90-92 Broughams? This sounds a lot like what the mechanic at my dealer told me, something about a separate amp and controller box....I should have written it down. The third system in the post, "The third is the Cadillac car stereo where the dash board unit is a display", the mechanic said my head unit was just a remote, is this the same thing? D148LO, thanks for the help on a post I made a few weeks ago with this site, http://www.pac-audio.com/oem1kits/roemresults.cfm?roemSearch=GM&Submit=Search+for+ROEM-1+kits
It didn't get me anywhere, so I'm still looking for options. Thanks for any help,

Brian

D148L0
02-07-05, 05:46 PM
Ugh...
Tough luck. I was afraid that could happen, but it was the best thing I could think of... I'm soory it didnt' work for you. Did you contacted the manufacturer? You may have the same problem I had, I ended up replacing the whole system. Now I'm glad I did, BTW.

90Brougham350
02-07-05, 08:29 PM
Yeah, I've emailed the company explaining my situation, I thought maybe there was some confusion with the whole name deal, Brougham, Fleetwood Brougham, how some people just call them Fleetwoods, so I tried to cover all the bases but they said I'm still outa luck. As of now, I've got a gorgeous Blaupuknt just sitting in the box but I'm afraid the portable with a tape deck plug-in is going to be the way I go until I can get out of school for the year and get my job back (please God, let me get it back! I don't wanna make 8 bucks an hour working register at the Family Dollar!) But of course, thanks for all the help so far.

Brian

92stsblue
02-08-05, 07:28 PM
worse case install...

heres what any average person can do...or have a friend / car stereo shop do!

leave everything factory (radio amp speakers etc) alone and in stock factory place...don't even bother with it! just leave it there & do not use it (don't turn it on)

install hard wire, from battery. install speakers...either bought in boxes or make some to hold the speakers...place them wherever...under seat on back seat panel etc... or UNPLUG factory wires to speakers & remove speakers to replace with aftermarket...which i did!

install radio in glove box or center box or etc. the hardest part here is the antennea install...you will need a very long antennea wire as the factory one is in the trunk...i used a police antennea, short amplified one that goes under the dash...as my deck is in the glove box.

ground wire to anything metal

wire up speakers

i'm using a spare deep cycle marine battery in the trunk and everything i installed is wired into that.

amp 4 channel for door speakers and a mono subwoofer amp for the subwoofer. subwoofer is mounted in the trunk with amps & battery.

this is most likely the best way to go. easy install & you end up with a very nice and clean install. that is isolated from the car completely.

the better the features of the radio you buy, the nicer it is to control it.

it leaves your vehicle stock to put back into stock form for resale and most people do not see your goodies.

well just thought i'd share...you can even buy a din (radio) face plate to fit the stock location and just unplug the stock radio deck and mount your new deck there... just do not cut wires - UNPLUG - them and replace factory stuff if ever need be at a later time.

best way to do a install

as for me not using the main battery...i find it peace of mind for me and no shorts or power robbing or dimming of the lights etc from the HUGE amount of power i'm taking to run my 2,000 watts (total) amps with caps. i just throw on the trickle charger every other week...deep cycle marine batterys are really a long lasting battery with caps hooked up!

GOOD LUCK. could always just buy a walkman...nah. :)

90Brougham350
02-08-05, 08:36 PM
Ok, so the factory wiring in the Brougham runs underneath the carpeting right next to the doors on the passenger side, is this the best place to put the new wiring? If so, what's the best way to get into the trunk? Is there a method I can use to get the wiring up and under the back seat?

Brian

92stsblue
02-09-05, 12:33 AM
Ok, so the factory wiring in the Brougham runs underneath the carpeting right next to the doors on the passenger side, is this the best place to put the new wiring? If so, what's the best way to get into the trunk? Is there a method I can use to get the wiring up and under the back seat?

Brian

lift out the back seat...start at the bottom & lift then just slide the wires under the back rest through to the trunk.

audio wires(speakers) should run on a seperate side as the power ground wires. (for interference) it's always best to run seperate from each other.

not sure what your setting up?

but hope this helps.

90Brougham350
02-09-05, 11:14 AM
I'm not setting anything up right now, but I will some time hopefully this summer, I'm just getting some info right now really, and sticking with a portable CD player until I can redo the entire system. I was just curious about the back seat, because we tried to get the seatback out of my friends' 88 Caprice, and we couldn't, and it never sat right again, had about a 1 inch gap between the seat and the rear deck, so I was wondering if there was some easy method or something. Thanks for the help,

Brian