Yellow accessory connector wiring options

Post by **SonicAdventure** » 20 Jun 2020, 17:34

Hi all, I’ve used the driver side yellow accessory connector in the past. For my CB in the V70, I used connector #1 which was supposedly a 30-amp circuit. It was constant hot, that much I know for sure.

I know that #8 is a ground connection. I’ve searched around for what connectors 2-7 are and some diagrams show several of them as 1-amp circuits and one as “X-supply”.

I’m trying to wire a 12 volt socket for charging phones into the 850. I know I could use connector #1, but I’m not sure I want a phone charger wired to a constant hot circuit. Which of the other connectors would be good for a 12 volt power circuit and what are the other connectors fused at?

Post by **BEJinFbk** » 20 Jun 2020, 20:44

X-Overload is your switched output.
It's probably a good idea to use it to
energize a relay to pick up constant.

Probably also a good plan to fuse everything.

: Accessory Connector - 5 Wire.jpg (52.21 KiB) Viewed 3051 times

96 850 AccConn Diagram.pdf: (267.12 KiB) Downloaded 289 times

1998 P80 AccConn.pdf: (371.6 KiB) Downloaded 260 times

Post by **SonicAdventure** » 20 Jun 2020, 20:57

BEJinFbk wrote: ↑20 Jun 2020, 20:44 X-Overload is your switched output.
I't's probably a good idea to use it to
energize a relay to pick up constant.

Probably also a good plan to fuse everything.

Accessory Connector - 5 Wire.jpg
96 850 AccConn Diagram.pdf
1998 P80 AccConn.pdf

Ok so looking at this diagram, connector #2 is hot in ACC or Run and has a 10-amp fuse. I’m thinking this would be the best option, as the other switched one is only hot when high beams are on.

If #2 has a 10-amp fuse for one 12volt power adaptor, would I still need another one in line? Most cigarette lighters use a 15amp fuse, would 10amp for a power socket be too low, as in blowing all the time? What if I put a 15 amp in the fuse panel in its place and didn’t use an in line fuse?

If using this Yellow accessory Plug isn’t the best method for a 12volt charging plug, where would be the next best place to tap into an ACC/Run switched circuit? I see the plug adaptor for the “Info” switch is right next to where I’m putting the 12volt socket. I have the regular gauge cluster and no plans to upgrade to the Info one. Could I just tap into that hot and ground?

Post by **abscate** » 21 Jun 2020, 00:40

Has anyone found the matching plug to the accessory plug provided by Volvo? I would love that.

An X circuit Is a switched hot 12 V supply in key pos II , not sure about I, which is also switched off during kP III ( starter cranking). Perfect for a phone charger

Post by **BEJinFbk** » 21 Jun 2020, 00:41

If it were me, I’d use 2 to trigger a relay
that supplies power from constant, then
fuse the relay’s output. Value? Dealer’s
choice, but 15 would be fine.

Post by **BEJinFbk** » 21 Jun 2020, 00:47

They have to be out there. maybe cut down
a connector with a higher pin count? If nothing
else, pins from other connectors should fit.
Just remove them from another shell. A little
heatshrink, fold it back and ty-wrap it off to
the acc conn harness and you have a pretty
solid and reversible connection.

Post by **SonicAdventure** » 21 Jun 2020, 08:03

abscate wrote: ↑21 Jun 2020, 00:40 Has anyone found the matching plug to the accessory plug provided by Volvo? I would love that.

An X circuit Is a switched hot 12 V supply in key pos II , not sure about I, which is also switched off during kP III ( starter cranking). Perfect for a phone charger

Thanks Abscate. When you say “matching plug” are you referring to just the removable part of the yellow accessory connector? I think that would have to be a junkyard item. Or are you talking about a yellow accessory plug with all 8 pins installed and several inches of wire attached to them, similar to a wiring harness you can buy for an aftermarket radio?

Post by **SonicAdventure** » 21 Jun 2020, 08:08

BEJinFbk wrote: ↑21 Jun 2020, 00:47 They have to be out there. maybe cut down
a connector with a higher pin count? If nothing
else, pins from other connectors should fit.
Just remove them from another shell. A little
heatshrink, fold it back and ty-wrap it off to
the acc conn harness and you have a pretty
solid and reversible connection.

Thanks for all your advice, BEJ. When I wired my CB in the last car, I just wired it straight to #1, and then grounded to the body it a few inches from the radio by attaching a lug to one of the bolts that held the knee bolster in place. I never had any trouble with that set up, never blew any fuses.

I like the idea of adding a relay and an inline fuse, but I’m not sure it’s worth all the trouble. Why do you think those additional steps are needed?

Post by **abscate** » 21 Jun 2020, 13:27

I would like a plug that mates with the yellow open plug under the dash, with pigtailed wires ideally

I didn’t find enough info on the plug to find a mating one

Post by **erikv11** » 21 Jun 2020, 13:40

abscate wrote: ↑21 Jun 2020, 13:27 I would like a plug that mates with the yellow open plug under the dash, with pigtailed wires ideally

I didn’t find enough info on the plug to find a mating one

You want this:

: accessory connector mate; 1086014883_pluggyplug.jpg.ceb551e32a8010174d182436a06cce6a.jpg (127.79 KiB) Viewed 2971 times

Available from VSer John Van Cleave (I think he's just jvc there), he figured it out ...

https://www.instagram.com/jvc8790/?hl=en
https://www.facebook.com/jvc8790