Installing a car stereo.

Carnac the Magnificent!,you are to blame for this rant. Had you been listening you would have heard the sound of ultimate suffering wafting your way from accross the Rockies, through the Dalles and up and over Mt. Rainier…

See, I wanted to resist doing a Pit Rant about this…stereo…of which you speak. With part of the settlement from the Camry (yeah, the wife totalled it, which is why we have this Pathfinder) I got a nice little CD player to replace the wore out tape deck that came with the Nissan. I’ve swapped out a dozen stereos, even had to run the complete circuit–battery AND accessory–to replace the AM only radio in the 83 Corolla. So, while I AM a confirmed idiot in most respects, I can handle car stereo. So I thought.

I take the new player out of the box. VERY simple wiring–8 wires for speakers, clearly labelled as +/- for RF, RR, LF & LR; 1 always hot wire for connection to battery, another for connection to accessory, a big old hole, with a little hole inside for the antenna wire and a couple jacks to hook into an optional amp. Looks good.

Dash bezel came off with nary a lost screw or broken tab. Stereo is mounted in a sturdy rack which is easily removed. Stripped one of four screws holding the old unit in place–drilled it out slicker’n grass through a goose. New stereo fits perfectly in the old rack. Even comes with 4 new screws, as if they knew there might be trouble. Gotta hand it to the folks at Kraco (kidding! Sony)

Of course, if you’ve replaced an OEM car stereo before, you know why I’m saving this bit for last: Let’s talk about the factory stereo wiring. Shall we? Yes. We shall. See, I knew there was going to be trouble when I disconnected the big fat black wire (antenna, right?) and instead of the single hole-within-a-hole, there were TWO little holes in there. WTF? Whatever, the old antenna’s a bent no longer mobile power antenna anyway. $10 will get me “antenna” with a REAL plug that will fit the new unit. I sweat this not. OEM deck is connected by this and two other plug/sets of wires. A WHOLE BUNCH. Don’t panic, Inigo. One plug has 9 wires. You have 8 speakers (car came with tweeties). I hook up the old stereo and nip a wire. Big RR speaker cuts out–and it’s tweetie as well. Notes the color of the wire and the result. In this way I identify The Nine, as I’ve begun to call them, and what they seem to do: 8 for the speakers, and one for…what the fuck is THAT one for? And I have another bundle of 7 more wires.

Just for fun I ignore them, run a hot lead directly from the battery, another from a similarly amped acessory and power on the new (with the very handsomely arranged display–good work, Sony) stereo. Things begin to be wronger. I’ve got a CD spinning in the new unit because, natch, I’ll be getting no dependable radio signal–crack-smoker antenna lead if you’ll recall. Berlin’s Love Life is the CD if you must know. All about getting fucked over by those you love, in case you’ve been following another soap opera. Anyway. By wronger, I mean–the speakers are making noise, but not right. Too quiet and…not the correct speakers? Whatever is going on, these are NOT the +/- wires I thought they were. I cast an uneasy eye upon the as yet untested plug of 7 wires.

More science performed on these bad boys suggests they are, get this: 1 or two for the power antenna, maybe the other is the Acc lead? 5 run sound to the tweeties and their associated 3x5s. OK. More science confirms that, no: one plug is not loaded with the + and the other with the -. It ain’t set up that way.

I’ll just stop here. The solution is simple enough: run new wire from the speakers (I’ll tie the tweeties to the 3x5s, I don’t care) to the stereo, run a hot wire from the battery like my kin in Mississippi do, and jurry rig an acc wire from…I dunno, the cigar lighter which I never use anyway. And Yes, I know I’ll end up burning out every damned circuit in my car, and my speakers will more than likely begin to smoke. Fuckit. It’s my wife’s car anyway.

Car and car stereo manufacturers have many ways of wiring and controlling speakers. Some may feed each speaker individually, some may have a common left and a common right ground, and so on. That’s what makes aftermarket installs so much fun.

Newer stereos may have any and all of the following: constant hot from battery, accessory switched hot from power, dimmable display input to be fed from dash light circuit, power out to power antenna, power out to accessory power amp that you may or not have, and perhaps an accessory ground as the case may not be at ground potential.

Every time a friend asks me to do a stereo install, I start with getting factory wiring diagrams, and if they arent available, I take the car apart and ohm out every lead, so things work right and don’t smoke.

That’s also a blessing of an outfit like Crutchfield. They sell interconnect wiring kits. I called them and requested a kit to install a Becker Electronic Grand Prix (out of a Mercedes 560SL) in a Ford Econoline van. They laughed (the stereo was given to me), but came up with mating connectors and a wiring diagram for both sides of the equation.

Skip the wiring diagrams, buy a pre-made wiring harness. Scoche makes them, molex makes them, so do a few other makers. It directly-and correctly-plugs into your existing plug, you solder or crimp it to the factory headunit harness and voila. No problems. Nor drama. Nor improper sounds from the improper speaker.

It gets slightly more complicated if there are external amps, but not much worse. Drop by your local bestbuy or circus city and tell them what you want, they’ll sell it to you for something less than $15, and you’re on your way.

Crutchfield sells more complete kits for difficult installs that involve removing interior panels completely. I always use Crutchfield.

Tough luck Inigo!

Sam

Thanks for the tip, Inigo Montoya. So I take it you’re not applying for that installer position at Best Buy? :smiley:

I second this. My husband, ever the handy man, used to install our car stereos when we were younger. He always bought from Crutchfield, and always bought a wiring harness.

Now we just take our cars to the pros.

Doesn’t Best Buy install car stereos for free (thinking of getting a Sirius)?

Of course, if you buy the wiring kit, it’s possible you’ll end up even more pissed off than you already are. At least, I know I did.

I don’t remember which brand my kit was, but I remember that I bought it at Wal-Mart and that it had all the makes, models, and years of cars it was valid for listed on the back of the package. My car was listed on the kit I bought, so naturally I thought it would fit.

Not even close. The plugs were vastly different from each other. The wires weren’t even the same damn colors. I had no idea what went where. I still don’t…

Emphasis added by me. If you buy shit, you get shit. In my 10-15 of stereo installs, I have never, ever gotten a mal-fitting wire harness. I have bought from Crutchfield and I might have bought from a GoodGuys of Circus City once.

I don’t think I could ever buy something like a wire harness from Wal-Mart with confidence. It sucks that they pull this crap on you, but if you go to the right place for the right part, you can leave your stock wiring alone and not make a slasher flick out of it.

Sam

You get what you pay for. When I worked on an install team at Goodguys, a guy with a Toyota came in. He had had someone at our store or maybe a competitor install his radio for him. It worked great when I was sitting in it, so I scratched my head.

Then he turned on his windshield wipers for me. :smiley: Every time the wipers would turn on and off, his radio went on and off, too.

Sam

Well, in my defense, I probably wouldn’t have hit Wal-Mart up for some high-quality electronics, but I figured for something as simple as a little piece of plastic that plugs into another little piece of plastic, nothing could possibly get fucked up.

Obviously, I was wrong.

hehehe…I thought I paid way too much for BestBuy to install my stereo. I feel better about it now.:wink:

When I bought my new car stereo, I made sure to buy the harness that went with my car and I (a girl who knows next to nothing about stereos) managed to install it and put it correctly in my dash myself! I was so proud of myself. It would have taken me about 1/2 hour, but I couldn’t figure out how to keep it from coming out of the dash forward and the instructions weren’t terribly clear. Eventually it dawned on me that I could just bend back the tabs in the casing and that would keep it from sliding forward! I felt like such an ass that the solution was so simple and it took me about 3 hours to figure it out. Now, unfortunately one of my speakers is blown. I am thinking of getting a new set of speakers, but really don’t know how to install them. Might have to get the pros in for that one.

Biddee, the speakers are much easier than the stereo. Just be sure to buy from Crutchfield, and you’ll get everything you’ll need for the speakers.

An aside: it took me 3 hours to install my stereo. I got it from Crutchfield, and all the instructions were spot on. It just took me a long time to get the wiring harness Crutchfield sent soldered to the wiring harness that came with the stereo. One thing’s for sure, that soldering job ain’t gonna have any problems, it is solid!

The speakers were much faster.

I’ve installed my own car stereos now for about 35 years and never have used a custom wire harness.

I owe part of that to the fact that, as an engineer, I had to troubleshoot power system control wiring schemes without any diagrams to help.

Still, time is money and I plan to use a custom harness for my next replacement.