Wire identification questions
Thread Starter
|
Senior User
Joined: Mar 2011
Posts: 107
Likes: 0
Wire identification questions
I have several wires under the dash that aren't connected to anything, hoping someone can tell me what they are supposed to be plugged into.
1. black/yellow stripe wire, yellow 3-prong female connector. What is it for?
2. Just below and to the left of the yellow connector, black female connector 2 black wires going into it
3. White/red stripe and black/yellow stripe to green connector. After green connector, blue/red stripe and black wire, both wires are cut. Black wire has molded rubber/plastic thing that the wire goes through in the upper right of picture. Black wire is ground, blue/red is key-on power. 99% sure this is for the radio but just want to check also what is the black rubber thing?
4. Green/yellow stripe to female bullet connector. A thicker green/yellow wire comes out of the lighter goes to another connector and this wire comes out of that. It is always-on power. Are these wires for options I don't have?
1. black/yellow stripe wire, yellow 3-prong female connector. What is it for?
2. Just below and to the left of the yellow connector, black female connector 2 black wires going into it
3. White/red stripe and black/yellow stripe to green connector. After green connector, blue/red stripe and black wire, both wires are cut. Black wire has molded rubber/plastic thing that the wire goes through in the upper right of picture. Black wire is ground, blue/red is key-on power. 99% sure this is for the radio but just want to check also what is the black rubber thing?
4. Green/yellow stripe to female bullet connector. A thicker green/yellow wire comes out of the lighter goes to another connector and this wire comes out of that. It is always-on power. Are these wires for options I don't have?
Elder User
Joined: Jun 2010
Posts: 677
Likes: 2
From: High Point NC
idk what to tel ya murf unless something isnt working i personaly wouldnt worry about it unless it make ya loose sleep at night. ive got a bunch of that kinds "loose ends" on my truck but everything works........
Senior User
Joined: Jul 2005
Posts: 494
Likes: 0
From: Mountville PA
1. is a keyed acc. feed there could be 1 or none going to this depending on what year you have
2. not sure don't see it on my 78'
3. your right on the radio- but yellow/black is + blue/red is the illumination + ground goes from radio to behind the istrument panel to a screw on the column support
4. would be a constant acc feed like cigarette lighter and glove box ill. or vanity mirror on visor on XLT
2. not sure don't see it on my 78'
3. your right on the radio- but yellow/black is + blue/red is the illumination + ground goes from radio to behind the istrument panel to a screw on the column support
4. would be a constant acc feed like cigarette lighter and glove box ill. or vanity mirror on visor on XLT
Thread Starter
|
Senior User
Joined: Mar 2011
Posts: 107
Likes: 0
supercabfreak - yeah, I know. I'm not really worried about it, just curious. Previous owner(s) did a hack job all over this truck so just trying to figure out what's what. The radio that was in the truck wasn't hooked up so I'm going to put in a new one which is what started this. Also found a red wire that was just wrapped around other wires and not connected to anything on either end 
(pretty sure it was for a stereo that was added then taken out)
kingford72 - Thanks a lot
Do you have any idea what that black rubber thing is on the black wire for the radio?
FYI I have 77 f150 custom 2wd, no options except gauges instead of idiot lights
(pretty sure it was for a stereo that was added then taken out)kingford72 - Thanks a lot
Do you have any idea what that black rubber thing is on the black wire for the radio?
FYI I have 77 f150 custom 2wd, no options except gauges instead of idiot lights
Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
Likes: 6
From: Raphine, Virginia
Unless you track down a wiring diagram for the truck, you are lost. Ford used one harness and extra wires and connectors are not uncommon, due to the varying options for a particular truck.
Thread
Thread Starter
Forum
Replies
Last Post
Glenn Nall
Explorer, Sport Trac, Mountaineer & Aviator
11
Apr 19, 2018 07:04 AM
Davetruck
Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics
3
Jun 21, 2015 04:18 AM
dotcentral
1967 - 1972 F-100 & Larger F-Series Trucks
5
Jan 10, 2004 12:32 AM
