Thrilling mystery. About my stock sound system

[Alt.240.130]

I have a 1996 240sx SE. (6 speaker model)

My problem is that there is no current at the memory wire, aside from a .4 volt spike (pin 6 on large connector at back of radio) I do, however, get 12v at pin 10, which is the power when the ignition is on.

At first I thought that the radio was blown, so I bought another. As it turns out you need 12 volts to both pin 6 and 10 for the radio to work.

I look in the FSM and says to replace "7.5 A fuse. (No. 8 located in the fuse block)"

Ive looked in both the foot well and under hood fuse boxes to no avail.

I also understand that this memory wire runs the clock and theft systems, among other things.

** I do have an aftermarket alarm which still works**

List of electrical things that dont work:SunroofRadio (duh)Clock

Three things I did to the harness:Cut all of the speaker ouputs and routed them to where the amp will beCut shield grounds and grounded them to the seat boltsCut lead wires for stock amps and routed them to amp location

I have not touched any of the power wires. The radio is also getting good grounding from the case.

Please help me find this fuse or wire that has burnt.

Sorry for the long read. I wanted it to be as clear and easy to read as possible

Thanks NICO!

Modified by Alt.240.130 at 10:26 PM 4/7/2008
Modified by Alt.240.130 at 10:27 PM 4/7/2008

[Alt.240.130]

C'mon guys, I need you on this one. lol

any input? any at all

[zerepdivad]

I have a 1996 240sx SE. (6 speaker model)

My problem is that there is no current at the memory wire, aside from a .4 volt spike (pin 6 on large connector at back of radio) I do, however, get 12v at pin 10, which is the power when the ignition is on.

At first I thought that the radio was blown, so I bought another. As it turns out you need 12 volts to both pin 6 and 10 for the radio to work.

I look in the FSM and says to replace "7.5 A fuse. (No. 8 located in the fuse block)"

Ive looked in both the foot well and under hood fuse boxes to no avail.

I also understand that this memory wire runs the clock and theft systems, among other things.

** I do have an aftermarket alarm which still works**

List of electrical things that dont work:SunroofRadio (duh)Clock

Three things I did to the harness:Cut all of the speaker ouputs and routed them to where the amp will beCut shield grounds and grounded them to the seat boltsCut lead wires for stock amps and routed them to amp location

I have not touched any of the power wires. The radio is also getting good grounding from the case.

Please help me find this fuse or wire that has burnt.

Sorry for the long read. I wanted it to be as clear and easy to read as possible

Thanks NICO!

Modified by Alt.240.130 at 10:26 PM 4/7/2008

Modified by Alt.240.130 at 10:27 PM 4/7/2008

Well man it's pretty obvious you've got a blown fuse or just a shorted out wire. on s13's the one that runs that stuff i believe is called "room lamp" or something like that so i'd look in the fuse box for something like that, or just check all the fuses. But otherwise if you really can't find it then to at least get your radio working you can always run the wire that should get 12v constant off the radio to the battery, or your ignition harness should also have a constant 12v wire as well. Or you could even tie that wire in with the one that gets switched 12volts but you won't keep presets and time etc. It's all you man but i'm willing to bet it's just a blown fuse you're overlooking.

[Alt.240.130]

thats what i figured. i checked every 7.5 fuse and they were all ok. are there any other things that use the same memory wire? Because if there is, and they work, that would rule out a blown fuse. But id have to tear apart my dash again.

Thanks

[the converted]

Here's the electrical manual section of the FSM for your car. I'd help dig but its coming up to finals and I have no time.

[Alt.240.130]

Thanks. Yeah i was looking through that section too. Since it also runs the theft system when the car is off (Read that on zilvia, but I havent checked the FSM to see if its true) I'm thinking that the aftermarket installer spliced into that wire. I'm hoping thats where my problem is.

[Alt.240.130]

So, I have another update for you all. This new problem makes all of this even more urgent. So if any of you have S14s and have had this fuse blow, and know where it is, PLEASE enlighten me.

My check engine light popped on not too long ago. I went to go get it scanned. I have tried three different scanners and all of them could do nothing. I searched "dead OBD ports" on google and found that the same circuit that runs all of the things not working in my car also runs the OBD II port. Great.

The title was switched over not too long ago and I'm expecting to take emissions soon. Obviously I will not pass.

Please Help!!!

[Looneybomber]

Can you wire a new one from the battery just temporarily to pass you inspection?

[Alt.240.130]

Can you wire a new one from the battery just temporarily to pass you inspection?

I think I could. Maybe. I would have to look for a pinout diagram of it to see what was what. Ive been doing some research and I hope I will have it figured out soon.

[Jager]

check your engine bay fusebox as well, and try testing your fuses with a multimeter, ive had fuses that didnt look popped but were not allowing current though, the multimeter also allows you to check the wiring behind the fuse by touching the multimeter probes in the two sockets. worth a try if you cant find the culprit otherwise

[Alt.240.130]

check your engine bay fusebox as well, and try testing your fuses with a multimeter, ive had fuses that didnt look popped but were not allowing current though, the multimeter also allows you to check the wiring behind the fuse by touching the multimeter probes in the two sockets. worth a try if you cant find the culprit otherwise

Yeah I did that just yesterday. Found that the fuse was good (tested in another socket) But the wiring was bad. So I pull the lower dash pieces and loosen the fuse box. When I look behind it the damn wire isnt even connected. It looked like someone did a ****ty splice job and didnt solder. Sad thing is that half of my wires in the entire car are in the same condition. The guy who had the car before me got it through an auction in Georgia. So I who knows were she has been.

And I fixed the OBD connector too. Lucky day.

**NEW PROBLEM**

Since I have the radio working I went to hook up the amplifier. Because it comes straight from the radio I soldered the wires into RCA's. I plug everything in and sound comes from each speaker, but sounds muffled.

It is an audiobahn four channel 600w. (A6004T i think)I tested the wires on the low level inputs by just holding the wires there. I did that before I mated them to the RCA's. Sound was clear and loud, worked perfect. They are the cheap Radioshack brand RCA's. Do you think that is my problem? Should I get the better ones? Or do you think I soldered them backwards? (The " - " is on the outside of the RCA)

[the converted]

Could just be a phasing issue.