which wire goes where? aftermarket radio install

[cdddt_95]

looking to install an aftermarket stereo into my 1980 king cab.

I am having trouble finding a diagram telling me what wire does what and goes where..

there are 6 wires total

1 brown

1 light green

1 light green/red

1 red/yellow

1 red/blue 

1 black and blue

 

i need help finding out which ground from my stereo goes where

 

 

with the use of my test light, the brown wire only makes my test light go off when in the "on" position

so im assuming thats the accessory wire??
 

any help is appreciated. not good with this electrical stuff

 

 

[canon3383]

Here is the schematic to an 1885 720 radio wiring, hope this help

 

 

 

 

Edited December 18, 2019 by canon3383

[cdddt_95]

thanks for the help. But that wiring diagram makes zero sense to me. im not good at electrical stuff 

[datzenmike]

The '80 wiring and fuse box is vastly different from the '81 and up wiring. For one there is only one speaker on the '80.

[canon3383]

datzenmike is the Datsun guru, my schematic wont work for that truck. You will need a multimeter to measure to find which is the ground wire. A test light will not do that.

[datzenmike]

Clip the test light to + 12v and if the light comes on when touching a wire with the probe it must be ground. It's just the reverse of looking for power.

[canon3383]

I don't like running +12 volts like that as I have blown grounded speakers touching the wrong wire, fried an Amp another time, that cost me a lot of money, granted that was a long time ago, lesson learned.

[cdddt_95]

when i tried using the test light with the ignition off, none of the wires would make it light up. somebody told me it could of been a blown fuse but i checked and my fuses were good

 

[datzenmike]

This sounds right. The stations are push button so no power is needed to power the memory. Turn the ignition to ON or ACCESSORY and then check the Brown wire.

 

 

Red/Yellow goes to the dash lights

Red/Blue to the dimmer.

 

Light Green and Light Green/Red are the two speaker wires.

 

Brown* to Accessory or fuse... on with ignition

 

Black/Blue to ground

 

I think this is right.

[85 720 king cab 4x2]

Not sure what u mean by ground the other one ?.. are u saying ground either the red/yellow dash lights or Ground Blue/Red Dimmer lights and run the Red on & off with the ignition or brown with a yellow Constant straight to battery / fuse holder before the battery? I have No dash lights or Dimmer ? I ended up running the red/ Yellowto the  brown power to the cigarette lighter to get my dash lights to come on I must’ve fried the dimmer because I grounded for dimmer Like I said at least I now have dash lights but no dimmer! It’s gotten even worse after this but if u can you tell me what I would be doing wrong with this Last scenario would be great but if you can ,just explain or if I can get the dimmer switch to come back I’ve got a new dimmer Switch! Very confused 85 720 king cab owner! 

[85 720 king cab 4x2]

P.S. Please forgive the broken English I talk text a lot and hands up a lot of the times being what we call Textwaneese! (Short for broken texting) Thank you very much for anyones time with this problem or hopefully Datsunmike isn’t sick of coming back here to listen to this babbling 720 idiot! 

[datzenmike]

On 12/18/2019 at 6:01 PM, datzenmike said:

This sounds right. The stations are push button so no power is needed to power the memory. Turn the ignition to ON or ACCESSORY and then check the Brown wire.

 

 

Red/Yellow goes to the dash lights

Red/Blue to the dimmer.

 

Light Green and Light Green/Red are the two speaker wires.

 

Brown* to Accessory or fuse... on with ignition

 

Black/Blue to ground

 

I think this is right.

 

If dimmer not working  connect the radio light wires as follows...

 

Red/Yellow  connect to the Brown wire (power)

Red/Blue connect to the Black wire (ground)

 

The light in the radio will be on all the time when the radio is on. This won't matter in the daytime however at night you won't be able to dim it. It's not that bright.

 

As to the dimmer and the loss of dash lights, with headlights ON check the rear tail lights are on. 

 

If the tail lights are off with the headlights on then the fuse is probably blown.

 

If they are on with headlights on then replace the dimmer I guess. 

 

 

[Thomas Perkins]

What kind of Stereo are you installing.I just had one installed in mine.I didn't do it.I use to back in the 70's.I wouldn't of got it right.

Edited February 19 by Thomas Perkins

[85 720 king cab 4x2]

No, it’s an old vintage Kenwood and a Kenwood spectrum analyzer, graphic equalizer and it’s been kind of a nightmare. I haven’t got back to this post and/or the radio because I had other problems with the 720 still working on the dimmer. I got several dimmer switches, because none of them seem to work. I’m wondering if I fried something??

[Thomas Perkins]

Best bet is to call a good radio shop and see if they can install it for you.When I had mine installed and they gave me my old 22 year old  Kenwood back with all the wires,no way in hell would I have got it Playing my Pink Floyd again.A new bad ass Kenwood with all the bells and whistles is only 179.00.This what I have...Plus Kenwood and infintiy speakers and XM-SIRIUS hook up.

 

Edited February 27 by Thomas Perkins