MYSTERY Knob! Who Can Name It?
#1
Heel & Toe
Thread Starter
MYSTERY ****! Who Can Name It?
We're looking at a '72 (Edit: Convertible) with all your power options and A/C. I have little idea what this **** and these wires could be for. The radio doesn't work, and I have a feeling these may all be the reason why? Only other things in the area that appear inoperable are the center console gauges. Likewise, I found a mystery red wire with electrical tape that was threaded through and dangling by the shifter ****, but I think that's unrelated.
Here's the **** in question. He refuses to talk! Give 'em hell, boys!
Flip side of the panel (Driver's side center console). Two obvious wire connection points...
Local area busted wire. Not sure if related since the short end wouldn't reach the ****, and there is a 3rd wire tear on the opposite side.
Passenger side broken wire for reference. Long enough to reach driver side of console.
Any ideas or guesses would be greatly appreciated. I'm hoping it's something I can fix up myself with my little car/wiring knowledge.
Here's the **** in question. He refuses to talk! Give 'em hell, boys!
Flip side of the panel (Driver's side center console). Two obvious wire connection points...
Local area busted wire. Not sure if related since the short end wouldn't reach the ****, and there is a 3rd wire tear on the opposite side.
Passenger side broken wire for reference. Long enough to reach driver side of console.
Any ideas or guesses would be greatly appreciated. I'm hoping it's something I can fix up myself with my little car/wiring knowledge.
Last edited by GraphicFeedback; 09-30-2015 at 05:59 PM.
#2
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I think bubba was there
#3
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That was the factory placement for a rear defroster switch.
Have to see if defroster unit is still there.
Check under rear window behind drivers side seat.
Marshal
Have to see if defroster unit is still there.
Check under rear window behind drivers side seat.
Marshal
#4
MYSTERY ****! Who Can Name It?
looks like a potentiometer... for volume control, possibly for a line to a powered sub woofer?... who knows. Dig up the previous owner and ask them with a Ouija board.
#5
Heel & Toe
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#6
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Hi and welcome!
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
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GraphicFeedback (09-30-2015)
#8
Heel & Toe
Thread Starter
Hi and welcome!
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
I'm not use to these tube-shaped fuses, so I'm unclear on how to check their quality. I did just get a whole replacement set in the mail... I'm thinking about just swapping them all out. hahaha
#9
Heel & Toe
Thread Starter
But I think you might be right. Or at least that's what Google Images thinks.
#10
Racer
It looks like in the 3rd and 4th picture the wire has clear insulation those look like wires for the rear speaker. Hope you can figure things out, I have a wiring problem I have not been to find the problem yet, guess I will keep looking. Good luck.
Larry
Larry
#11
Heel & Toe
Thread Starter
Hi and welcome!
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
Not 100% sure about the wire in the third picture but if it's brown it might attach to the parking brake switch, does the dash 'brake' light go on when you pull up on the parking brake?
For the center gauges is the fuse good?
Here's a schematic, it's good except the direction of rotation for the distributor should be clockwise.
http://www.vetteprojects.com/bmv/mis...tte%201972.pdf
Regards, Pete.
Last edited by GraphicFeedback; 09-30-2015 at 06:42 PM.
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I kind of think it was a visit from bubba and used for something different.
If you look at the AIM pages you'll see the rear defroster switch had screws that held it in place. (none shown in the op's picture)... even if it was replaced there would still be the extra holes.
If you look at the AIM pages you'll see the rear defroster switch had screws that held it in place. (none shown in the op's picture)... even if it was replaced there would still be the extra holes.
#15
Instructor
As others have identified the 'mystery ****' is a potentiometer and was generally used as a fader to balance rear speakers.
Here's a diagram of how it should be wired. The more resistance dialed in made for less volume out the speaker.
Here's a diagram of how it should be wired. The more resistance dialed in made for less volume out the speaker.
#16
Heel & Toe
Thread Starter
Thank you all! Looks like you're onto something. And I think I'm starting to grasp who Bubba is. I would love to get that radio working; I suppose I just have to start tracing which wires need to be connected where...?
...To be completely honest I don't even know where the dang speakers are on this car. haha
...To be completely honest I don't even know where the dang speakers are on this car. haha
#17
Team Owner
The add-on rear speakers have likely been removed...which is why the speaker wires have been cut up front. Nice to have those wires in-place, though; you may want to reuse them. That 'fader' control didn't have enough current capacity to do its job...so it fried.
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#19
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Hi GF,
I too am thinking 'fader switch'.
And yes, convertibles could have the rear defroster option too as the drawing Willcox posted illustrates.
Regards,
Alan
I too am thinking 'fader switch'.
And yes, convertibles could have the rear defroster option too as the drawing Willcox posted illustrates.
Regards,
Alan