SC-901 cable color connectors A y B and Black-Red cable

gusinfantino · Post by **gusinfantino** » 28 Nov 2020, 12:52

Hello everyone. I'm trying to reinstall the original SC-901 on my 1998 C70, which includes the amplifier, dolby processor, and center dash speaker.
Everything is in place, wired and connected, but the unit doesn't turn on and I have these 4 cables not connected, because I don't know they should be connected.
Somebody could help me? Or send me a photo of the connectors A and B on the back of the SC-901? So I can check if they are connected in the correct order. Attached image of the cables that I have left.
I will greatly appreciate any information you can give me
Thank you all.

Post by **RickHaleParker** » 28 Nov 2020, 15:37

: '98-C70_Radio_Connector.PNG (125.14 KiB) Viewed 2994 times

gusinfantino · Post by **gusinfantino** » 29 Nov 2020, 07:57

Thanks Rick!
I already had these diagrams but I still have doubts about where the Red-Black cable is connected
I'm going to review again.
Kind Regards! and thanks again

Post by **Goupil** » 29 Nov 2020, 10:50

I have an SC900 in mine, and as far as I can remember there's no free wires

The pinout might help you

source: https://www.tehnomagazin.com/Auto-radio ... nector.htm

gusinfantino · Post by **gusinfantino** » 29 Nov 2020, 13:04

Thanks Goupil!!
i´ve visited de url you sent me. I¨ll check the connectors again.
very kind of you
Regards

Post by **RickHaleParker** » 29 Nov 2020, 13:40

gusinfantino wrote: 29 Nov 2020, 07:57 I already had these diagrams but I still have doubts about where the Red-Black cable is connected

The only place I see R-SB is the main power. Look at connector 24/13A. If the R-SB has +12V on it, pull fuse 11C/7 and see it pulling the fuse cuts the power on the R-SB. If it does you confirmed what the R-SB is.

Post by **scot850** » 29 Nov 2020, 16:51

Maybe I can find pictures for you.

I found a couple but not really great for what you need but may help a little

: Harness at radio end

The wiring connectors to the left of the picture above are the connectors that attach the harness to the original connectors in the back of the radio and link to the amplifier under the passenger seat. The 3 connectors on the right side are the ones into the radio. This is a SC-900/901 amp harness

: Wires to rear of radio

The single connector with the black/yellow wire I think is either the radio mast (sedan) or a constant power line. Someone with a wiring diagram and skills will have to answer that correctly.

: Closer picture of radio end of harness

Shoot. I think I may have a SC-901, amp and harness in the garage and not in the storage facility with all my other spares. I'll look and see if I can find it and take better pictures for you. I'll do that later!

Neil.

Post by **scot850** » 29 Nov 2020, 21:11

I've added some more pictures that may help. Found I have 2 spare harnesses in the garage.

: single yellow/black wire to connector

Sorry it is blurry but hopefully good enough.

: Large connector (1)

: Large connector (2)

: Large connector (3)

: Large connector (4)

: Large connector (5)

The large connector if you look carefully from the front has metal pins/contacts only where there is a wire.

Neil.

gusinfantino · Post by **gusinfantino** » 30 Nov 2020, 05:18

Thanks Scot850 and RickHaleParker!!!
Im sending this information and the pics to the Audio Guy who is as lost as Tom Hanks in Castaway.
Very kind of you both. Regards

Post by **scot850** » 30 Nov 2020, 16:46

Let us know how it goes and if we can help further.

Neil.