87 stereo wiring in dash

kidchaos · 08-04-2008, 05:53 PM

I have an 87 s10 that i don't think ever came with a radio. I'm trying to wire one up in it but only have three wires i can find for a stereo. I have a grey, black and yellow. I tried to wire the black to ground on the radio, yellow to power then grey to power however i don't get anything on the face of the radio and it does not have constant power. can someone help me with what wires i'm missing or a wiring diagram for the truck.

There has never been an antenna on the truck (no hole for one on either fender) but there are two speakers withaftermarket wires comming out of the dash for them. I will post pics tonight or tomorrow.

thanks,

leprechaun1874 · 08-04-2008, 06:03 PM

get a multimeter and check the wires. worse case you might have to run a wire for the power.

Dr.Fiero · 08-04-2008, 06:10 PM

Grey is the dimmed output for backlighting.
Black is ground.
Yellow is switched power.
You need an orange wire (cig lighter is an easy spot to take it from there).

kidchaos · 08-05-2008, 03:27 PM

Quote: Originally Posted by Dr.Fiero

Grey is the dimmed output for backlighting.
Black is ground.
Yellow is switched power.
You need an orange wire (cig lighter is an easy spot to take it from there).

dimmed output for backlighting? is that the illumination for the cd player? If so, can i just tie it into the yellow wire to have the backlight of the screen come on when the cd player comes on? I will use the orange wire form the cigarette lighter.

Dr.Fiero · 08-06-2008, 11:49 PM

Quote: Originally Posted by kidchaos

dimmed output for backlighting? is that the illumination for the cd player? If so, can i just tie it into the yellow wire to have the backlight of the screen come on when the cd player comes on? I will use the orange wire form the cigarette lighter.

The dimmed output is what feeds the backlighting on your dash. It varies depending on what your dimmer is set to (roughly 8-12V).

The yellow will usually go to a mating yellow on the deck (Pioneer, sony, etc - most use the same scheme), and is switched power.

Yes, use the orange off the lighter socket (constant/battery always power).

kidchaos · 08-07-2008, 08:16 PM

Quote: Originally Posted by Dr.Fiero

The dimmed output is what feeds the backlighting on your dash. It varies depending on what your dimmer is set to (roughly 8-12V).

so this is the dimmer on the instrument cluster? can i tie it into the yellow wire or does it need its own connection?

Dr.Fiero · 08-08-2008, 11:14 PM

Yes - the grey wire is the output from the dimmer.

If you have no need for it on your deck (most aftermarkets dont!) - then just ignore it, and use the yellow for a switched source.

08-04-2008, 05:53 PM	#1
kidchaos Registered User Join Date: Feb 2008 Posts: 69 Location: User is: OffLine	87 stereo wiring in dash I have an 87 s10 that i don't think ever came with a radio. I'm trying to wire one up in it but only have three wires i can find for a stereo. I have a grey, black and yellow. I tried to wire the black to ground on the radio, yellow to power then grey to power however i don't get anything on the face of the radio and it does not have constant power. can someone help me with what wires i'm missing or a wiring diagram for the truck. There has never been an antenna on the truck (no hole for one on either fender) but there are two speakers withaftermarket wires comming out of the dash for them. I will post pics tonight or tomorrow. thanks,
	[Reply w/Quote]

08-04-2008, 06:03 PM	#2
leprechaun1874 Registered User Join Date: Jul 2006 Posts: 324 Location: Charlotte User is: OffLine	Re: 87 stereo wiring in dash get a multimeter and check the wires. worse case you might have to run a wire for the power.
	[Reply w/Quote]

08-04-2008, 06:10 PM	#3
Dr.Fiero Registered User Age: 42 Join Date: Oct 2003 Posts: 264 Location: Delta, BC User is: OffLine	Re: 87 stereo wiring in dash Grey is the dimmed output for backlighting. Black is ground. Yellow is switched power. You need an orange wire (cig lighter is an easy spot to take it from there).
	[Reply w/Quote]

08-05-2008, 03:27 PM	#4
kidchaos Registered User Join Date: Feb 2008 Posts: 69 Location: User is: OffLine	Re: 87 stereo wiring in dash Quote: Originally Posted by Dr.Fiero Grey is the dimmed output for backlighting. Black is ground. Yellow is switched power. You need an orange wire (cig lighter is an easy spot to take it from there). dimmed output for backlighting? is that the illumination for the cd player? If so, can i just tie it into the yellow wire to have the backlight of the screen come on when the cd player comes on? I will use the orange wire form the cigarette lighter.
	[Reply w/Quote]

08-06-2008, 11:49 PM	#5
Dr.Fiero Registered User Age: 42 Join Date: Oct 2003 Posts: 264 Location: Delta, BC User is: OffLine	Re: 87 stereo wiring in dash Quote: Originally Posted by kidchaos dimmed output for backlighting? is that the illumination for the cd player? If so, can i just tie it into the yellow wire to have the backlight of the screen come on when the cd player comes on? I will use the orange wire form the cigarette lighter. The dimmed output is what feeds the backlighting on your dash. It varies depending on what your dimmer is set to (roughly 8-12V). The yellow will usually go to a mating yellow on the deck (Pioneer, sony, etc - most use the same scheme), and is switched power. Yes, use the orange off the lighter socket (constant/battery always power).
	[Reply w/Quote]


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08-07-2008, 08:16 PM	#6
kidchaos Registered User Join Date: Feb 2008 Posts: 69 Location: User is: OffLine	Re: 87 stereo wiring in dash Quote: Originally Posted by Dr.Fiero The dimmed output is what feeds the backlighting on your dash. It varies depending on what your dimmer is set to (roughly 8-12V). so this is the dimmer on the instrument cluster? can i tie it into the yellow wire or does it need its own connection?
	[Reply w/Quote]

08-08-2008, 11:14 PM	#7
Dr.Fiero Registered User Age: 42 Join Date: Oct 2003 Posts: 264 Location: Delta, BC User is: OffLine	Re: 87 stereo wiring in dash Yes - the grey wire is the output from the dimmer. If you have no need for it on your deck (most aftermarkets dont!) - then just ignore it, and use the yellow for a switched source.
	[Reply w/Quote]

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