vanquishings Posted May 2, 2022 Share Posted May 2, 2022 Was working away today and wanted to present you guys with a few mystery cables. First one is under the hood, by the cylinder closest to the firewall. Seems to have some kind of plastic fitting inside of the loose end. If I look at it from underneath, it's appears to go between the wheel well and transmission. Second is under the dash. Red cable near the fuse box. I assume this just needs to be plugged in somewhere. Heads right towards the center of the car. Lastly, anyone know the thread pitch on the lower dash screws and the license plate lamp screws? I've got the diameter and length, but my thread pitch tool doesn't have any course options available. Are they just sheet metal screws? Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 3, 2022 Share Posted May 3, 2022 Got any pics of said cables? It’ll help us verify if they’re OEM or not and what they’re doing. Link to comment Share on other sites More sharing options...
vanquishings Posted May 3, 2022 Author Share Posted May 3, 2022 13 minutes ago, eaglescout526 said: Got any pics of said cables? It’ll help us verify if they’re OEM or not and what they’re doing. Doh, I'm an idiot. Thought I had uploaded. Fixed now! Link to comment Share on other sites More sharing options...
87MJTIM Posted May 3, 2022 Share Posted May 3, 2022 The red wire does not look "factory." With the in-line fuse, could it feed an after market radio? The other "cable" could be from of the cruise control servo. Where does the other end connect to? Does it connect to the bracket with the accelerator cable on the throttle body? Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 3, 2022 Share Posted May 3, 2022 Actually that cable looks kinda like the evap hose from the fuel tank to the charcoal canister. Link to comment Share on other sites More sharing options...
Ωhm Posted May 3, 2022 Share Posted May 3, 2022 Broken antenna cable, maybe. Link to comment Share on other sites More sharing options...
vanquishings Posted May 3, 2022 Author Share Posted May 3, 2022 8 hours ago, 87MJTIM said: The red wire does not look "factory." With the in-line fuse, could it feed an after market radio? The other "cable" could be from of the cruise control servo. Where does the other end connect to? Does it connect to the bracket with the accelerator cable on the throttle body? I would have to agree. I think the yellow cable that is running along with it, isn't either. The dealer installed a cheapo radio and speaker set up, just because the car didn't have one. I wonder if that could be it. If yellow is plugged into IGN on the fuse box, should red be plugged into something as well? For what it's worth, Radio is working fine, as is. 6 hours ago, eaglescout526 said: Actually that cable looks kinda like the evap hose from the fuel tank to the charcoal canister. Interesting! I was looking to see where that plastic fitting could have come from, but I didn't look there. I'll have to take another look when I go work on it, again. 5 hours ago, Ωhm said: Broken antenna cable, maybe. Hmm. Not a bad option. Bit of a dumb question, but the radio is working fine now, would it be able to if it was an antenna cable? Link to comment Share on other sites More sharing options...
Ωhm Posted May 3, 2022 Share Posted May 3, 2022 1 hour ago, vanquishings said: Hmm. Not a bad option. Bit of a dumb question, but the radio is working fine now, would it be able to if it was an antenna cable? Yea, I'm looking at your photo thinking that little black dot is a single wire in the center of the cable. Oh well. Link to comment Share on other sites More sharing options...
vanquishings Posted May 3, 2022 Author Share Posted May 3, 2022 10 hours ago, 87MJTIM said: The red wire does not look "factory." With the in-line fuse, could it feed an after market radio? The other "cable" could be from of the cruise control servo. Where does the other end connect to? Does it connect to the bracket with the accelerator cable on the throttle body? To add to this, can't be cruise control, my truck doesn't have it. Link to comment Share on other sites More sharing options...
vanquishings Posted May 4, 2022 Author Share Posted May 4, 2022 On 5/3/2022 at 9:56 AM, eaglescout526 said: Actually that cable looks kinda like the evap hose from the fuel tank to the charcoal canister. We have a winner! Dug a little deeper today and was actually able to see the port where it goes. Any good replacements out there so I can replace this? where does the other end go? A fuel line under the truck somewhere? Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 5, 2022 Share Posted May 5, 2022 That line goes from the charcoal canister to the fuel tank. There’s a metal line that hose goes to. It’s also a weird specific hose as one end is bigger than the other but I’m sure any flexible vac line will do. Link to comment Share on other sites More sharing options...
19Comanche 87 Posted May 8, 2022 Share Posted May 8, 2022 Does that metal line then go into a rubber hose just before the fuel tank? And then connect at the top of the tank? Link to comment Share on other sites More sharing options...
eaglescout526 Posted May 8, 2022 Share Posted May 8, 2022 Yes it does. It should go to one of the roll over valves. Link to comment Share on other sites More sharing options...
vanquishings Posted May 10, 2022 Author Share Posted May 10, 2022 Haven't been able to crawl under it lately, but I'll be able to take a look tomorrow and try to see the route it takes and get some dimensions for tubing, just in case it could be useful down the road for someone else. Link to comment Share on other sites More sharing options...
schardein Posted May 10, 2022 Share Posted May 10, 2022 Normal aftermarket stereo wiring has the red wire as switched power to actually run the stereo. Usually connected so it is hot when the key is in ACC and RUN. The yellow wire is constant battery power to maintain the memory, like the clock and radio station presets. This would also explain the yellow wire in your fuse block. Once you confirm that is what the wires are for, I would try wiring them as I've shown in the pic. Link to comment Share on other sites More sharing options...
vanquishings Posted May 10, 2022 Author Share Posted May 10, 2022 1 hour ago, schardein said: Normal aftermarket stereo wiring has the red wire as switched power to actually run the stereo. Usually connected so it is hot when the key is in ACC and RUN. The yellow wire is constant battery power to maintain the memory, like the clock and radio station presets. This would also explain the yellow wire in your fuse block. Once you confirm that is what the wires are for, I would try wiring them as I've shown in the pic. This is super helpful! I'm almost 100% confident that these are indeed stereo wires. Dealership said it came in from the PO without any stereo, and they just threw in a quick single din and two speakers behind the bench seat. It was a quick and dirty job, and the red and yellow wires do indeed head up towards the radio unit. I'm going to be removing the lower dash to fix something, and I'll be able to get a better look. I'd have to imagine the guys at the dealership didn't know where these wires should go, and just tried things until it worked. That being said, I got the truck with the red cable detached, and the radio works fine without it, while the truck is running. But I'll see if it'll turn on with the key in the ACC position, as well. I plan on replacing the entire radio/sound system down the road anyways, but this is gold for resolving a pesky mystery wire! I'll report back! Link to comment Share on other sites More sharing options...
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