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i know by now everyone doesn't want to hear about people's stereo issues, but i just need to know like two things that aren't really clear in reading the numerous old postings on this forum.
so i am going BACK to my old stock stereo, because i'm too broke and lazy to buy a new one after the old one was expropriated against my wishes. the DIN plug still is connected to my amp, but the many-wired harness was unplugged from the amp (because i had an after-market radio in there once). so i plugged it in. that didn't change anything -- my old volvo cassette player still don't even turn on when i've plugged in the DIN, harness and power. so i need to know: is that harness and DIN and (maybe even) power all somehow bypassing my amp, even though a very similar looking DIN plug and harness are connected to my amp? was much wire-cutting and reconnecting needed during the installation of my old aftermarket radio -- and do I have to re-do that in order to get my even older VOLVO radio back in there?
i REALLY appreciate any help anyone can give. THANK YOU!
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Okay, at the amp - the many-wired (should be 8 wires, 2 for each of the 4 speakers) rectangular connector. Was it pluggged into another connector, or just hanging there? If it was just hanging there, (and I'm assuming that the thief didn't take the time to disassemble the console and remove an adapter) then the previous aftermarket installer wired into the speakers somewhere else, and you're going to have to trace them from the radio connector.
The radio connector, the rectangular one, should have twelve or thirteen wires. Eight of them are for the speakers, and are usually paired sets, e.g., green and green with a black stripe. Follow these to find where the previous installer tied into the speakers.
The other five or so wires on that connector are the power and function leads.
Do you have the original Volvo rectangular harness connector, with five or six wires? You will need one to make that factory radio operate.
As I recall, the factory power harness, the rectangular one, has five wires.
1. Power always on
2. Switched power
3. Ground black
4. Power antenna
5. Light dimmer
Good luck. Post back, let us know what you found.
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It seems what you've said is the opposite of what i'm seeing. the stereo harness (that connects to the radio itself) is a rectangular plug with only seven wires (yet my VOLVO stereo has about 12 or so metal prongs on its female end of the plug). they connect into a bundle that is tightly wrapped in black tubing, it's not easy to trace, BUT it appears to be connected to the harness down at the amp (I can shake it on either side and feel the other end). The DIN-6pin plug is still there though, part of the same bundle that runs through the dash.
DOWN BELOW at the amp is the 12 or 11 wired plug/harness, which was in fact lying disconnected when i found it, so if maybe you're right and that the plug which connects to the radio itself is wired differently (yet i can feel that at least SOME of the wires are the same when i shake the bundle). also that harness down by the amp has many green, green with yellow, yellow with white, etc. and not a single red wire (the one above has a red wire).
so if its wired elsewhere (its obvious that it is) this entails removing my entire dashboard just to retrace this? seems incredible that this is normal for installing a new car stereo. and why are there only seven wires on my radio harness (rectangle), seeing as how that would have been the only thing connecting to my old Kenwood? Or maybe the guys at the car stereo place several years back changed some things (but that is another story).
thanks for helping, lemme know if you have another other ideas!
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It sounds as though you're describing the factory harnesses. Could be that your thief knew enough to rip off the adapter harnesses.
At the radio. The rectangular plug with 7 wires. Does it fit into the Volvo factory radio? If so, that is (probably) the factory harness. If you have a test light, test it. One of the prongs (probably a green wire) should light the light with the key in the off position. One of the prongs (yellow with black stripe) should light it up with the key in the on position. One should be a ground, probably black wire.
If nothing lights the test light, check the fuse. (edit: I just checked, and a factory radio I took out of a 1990 740 has a couple of fuses in the back of the radio, a 3 and a 5 amp.)
If all that works, plug it into the radio, connect the din plug, and the antenna, and the radio should come on with the key in the on position.
Move to the amp, and the hanging plug. The factory rectangular connector can have up to 12 wires - some had additional power and ground connections. The key is that it has at least 8 wires, 4 paired sets for each of the speakers. If it fits, plug it and the din connector into the amp.
Radio should work. If not, then bad radio or bad amp.
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posted by
someone claiming to be geodonuts
on
Mon Mar 3 18:11 CST 2008 [ RELATED]
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thanks for your help box
but actually no, nothing is working. essentially i did what you said, though way back in the beginning: hooked up the whole thing, even checked the fuse in the radio, and nothing changed, radio don't work. did not try test light, will do that just in case.
otherwise, what could possibly have befallen my amp and radio in the meantime when they were unused for so many years?
and let me get this straight one last time: because these harnesses are the factory stock (seven wires at the top, about 12 down at the amp [also the car armenian radio shop owner who said that the harness was 'not the right one' for a new stereo), and they seem to lead in the right directions, there isn't any fancy re-wiring going on elsewhere in the car that i might have to tinker with, some reroute of the speaker wiring that is the cause of this mess? i mean i hope youre right and it's just a bum amp or something.
thanks for your help!
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Without actually seeing it, the descriptions you provide sound like the factory setup. That doesn't mean that somebody didn't totally bypass the speaker wiring. But the fact that you aren't seeing a bunch of stray wires in the radio cavity is promising.
It sounds as though your head unit is not getting any power, so testing the lines is the next logical step.
By the way, through all of this, I'm assuming that the stock unit is a CR-712 - is that correct?
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posted by
someone claiming to be Yama
on
Sat Mar 1 00:49 CST 2008 [ RELATED]
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I haven't read your previous post but I like to follow one basic rule. Never cut into the main wiring harness. Having said that every time I wire an aftermarket radio to a 240 I'll pull out the amplifier cut the connector off it that powers the rear speakers. I'll also cut a connector from a bad factory radio. I'll then take the 2 connectors and wire them to the aftermarket radio. That aftermarket radio will now plug into any 240.
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