Wiring Nightmare! HELP!
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Junior User
Joined: Aug 2004
Posts: 52
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From: Way up in the mountains
Wiring Nightmare! HELP!
I want to wire a radio into my '77 F-250. I want to wire it into the ignition switch so it will come on when the key is on and go off when they key is turned off. My question is what wire should I splice into on the back of the ignition switch?
Here are the wires.....
~Black with a green stripe
~Yellow
~Purple with a white stripe
~Red with a green stripe
~Red with a green stripe
~Red with a blue stripe
Now I checked in my manual and on the wiring diagram it doesnt show 2 Red with green stripes. It says I am suppossed to have another Black with a green stripe. I checked it 15 times and it is definitely Red with a green stripe. However, the second Red with a green stripe has this written on it...... "Resistor. Do not cut or splice." Can anyone help me out on this one? I just want to have a radio in my truck. Which wire is it?
Thanx.
Also........ The Black with a green stripe wire and the Yellow wire are bigger than the others.
Here are the wires.....
~Black with a green stripe
~Yellow
~Purple with a white stripe
~Red with a green stripe
~Red with a green stripe
~Red with a blue stripe
Now I checked in my manual and on the wiring diagram it doesnt show 2 Red with green stripes. It says I am suppossed to have another Black with a green stripe. I checked it 15 times and it is definitely Red with a green stripe. However, the second Red with a green stripe has this written on it...... "Resistor. Do not cut or splice." Can anyone help me out on this one? I just want to have a radio in my truck. Which wire is it?
Thanx.
Also........ The Black with a green stripe wire and the Yellow wire are bigger than the others.
Posting Guru
Joined: Feb 2004
Posts: 1,388
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From: Saratoga, NY
I put a Voltmeter in mine a while ago and I found a couple unused factory wires under the dash that were switched, the fuse block as mentioned works good too, I would stay away from hacking into the ignition switch wires.
New User
Joined: Jan 2008
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Get away from the iginition switch 
Behind the heater switch control >....See that wire connector that has a blue/red stripe wire & a Black wire on it.
The Black one is Keyed Power for your radio.
The other one is for the Radio light,it comes on with the headlight switch.
.
Look for the radio plug on this illustration
http://www.clubfte.com/users/mil1ion...oconnector.JPG
Behind the heater switch control >....See that wire connector that has a blue/red stripe wire & a Black wire on it.
The Black one is Keyed Power for your radio.
The other one is for the Radio light,it comes on with the headlight switch.
.
Look for the radio plug on this illustration
http://www.clubfte.com/users/mil1ion...oconnector.JPG
Last edited by Mil1ion; Jun 18, 2005 at 12:59 PM.
Posting Legend
Joined: Sep 2001
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Post Fiend
Joined: Jul 2004
Posts: 8,786
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From: Northern California
Even on the radio delete models, you should still have a "radio plug" to plug the radio into. Just like on my old 1973, with the radio delete.
Infact the truck had plugs for cigar lighter, glove box lamp, had wiring up to behind the seat for the optional cargo light, and dome map lights, and etc.
The plugs are there, you may need a wiring harness to plug into the plug, to finish going to where it needs to go, but the wiring should be there.
Infact the truck had plugs for cigar lighter, glove box lamp, had wiring up to behind the seat for the optional cargo light, and dome map lights, and etc.
The plugs are there, you may need a wiring harness to plug into the plug, to finish going to where it needs to go, but the wiring should be there.
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