Help with Blue/White Stripe Mystery Wire Behind Gauges on 1988 911

[1989Carrera]

I promise I went completely through all the wiring diagrams in my Bentley Service Manual before posting this.

I pulled the gauges to install Carmagic's LED set. While I had the gauges out I took a look at all the wiring and connections. I found a blue wire with a white stripe that appears to have pulled out of its connector because it has about an 1/8" of bare wire.

I've been searching for hours. I can't find what this wire was connected to. It has no power. Not with the key in the off, accessory, on or with the headlights turned on.

The wire comes out of the large bundle of wires of wires that runs underneath all the gauge wires.

I have attached pictures. One of the blue wire with the white stripe and the other of where this wire exists the large bundle.

I'm hoping one of you can solve this mystery for me so I can put my gauges back in.

Sincerely,

Dall

[1989Carrera]

Originally Posted by 1989Carrera

I promise I went completely through all the wiring diagrams in my Bentley Service Manual before posting this.

I pulled the gauges to install Carmagic's LED set. While I had the gauges out I took a look at all the wiring and connections. I found a blue wire with a white stripe that appears to have pulled out of its connector because it has about an 1/8" of bare wire.

I've been searching for hours. I can't find what this wire was connected to. It has no power. Not with the key in the off, accessory, on or with the headlights turned on.

The wire comes out of the large bundle of wires of wires that runs underneath all the gauge wires.

I have attached pictures. One of the blue wire with the white stripe and the other of where this wire exists the large bundle.

I'm hoping one of you can solve this mystery for me so I can put my gauges back in.

Sincerely,

Dall

[Trackrash]

High beam indicator?

[timmy2]

Originally Posted by Trackrash

High beam indicator?

Should be, if the same as earlier SC wiring and all earlier cars..

[1989Carrera]

I'll go see if it's the high beam indicator.

[1989Carrera]

Originally Posted by 1989Carrera

I promise I went completely through all the wiring diagrams in my Bentley Service Manual before posting this.

I pulled the gauges to install Carmagic's LED set. While I had the gauges out I took a look at all the wiring and connections. I found a blue wire with a white stripe that appears to have pulled out of its connector because it has about an 1/8" of bare wire.

I've been searching for hours. I can't find what this wire was connected to. It has no power. Not with the key in the off, accessory, on or with the headlights turned on.

The wire comes out of the large bundle of wires of wires that runs underneath all the gauge wires.

I have attached pictures. One of the blue wire with the white stripe and the other of where this wire exists the large bundle.

I'm hoping one of you can solve this mystery for me so I can put my gauges back in.

Sincerely,

Dall

Originally Posted by timmy2

Should be, if the same as earlier SC wiring and all earlier cars..

My high beam indicator wire is white with a blue stripe.

Any other suggestions?

[darrin]

does your CASIS upshift indicator light (orange arrow in tach) work? Can't remember what color my wire was, but one can disable it by snipping/removing a wire that feeds into the tach wiring harness.

[timmy2]

Turn signals working correctly? (At the gauge)

[1989Carrera]

Originally Posted by darrin

does your CASIS upshift indicator light (orange arrow in tach) work? Can't remember what color my wire was, but one can disable it by snipping/removing a wire that feeds into the tach wiring harness.

I honestly don't remember is that works or not. I'll go check.

Thank you for the suggestion.

[1989Carrera]

Originally Posted by timmy2

Turn signals working correctly? (At the gauge)

Yes, the turn signal indicators work. Hazard indicators work. Hi beam indicator works. All the gauge lights are working. All the gauges are working.

I'm going to check the shift indicator light.

Thank you for the suggestion.

[Arne2]

I think the shift indicator is a black wire.

Only blue/white I can find on my diagrams goes to the fog light switch.

[timmy2]

This is why I don’t build wiring harnesses newer than ‘83. Porsche changed way too many standard wire color combinations and their destinations compared to everything they built before. Along with most of the plastic connectors that are NLA. Never mind the downsizing of the wire gauge to thinner cheaper wires. The factory B&W prints suck too....

Maybe in a few years when I retire from my day job and have time to R&D them, but until then I will continue to avoid them.

[jjeffries]

Seeing this now. Think I read somewhere else this is the Euro tow- hitch pigtail? Not joking. John

[1989Carrera]

Originally Posted by jjeffries

Seeing this now. Think I read somewhere else this is the Euro tow- hitch pigtail? Not joking. John

John,

Yes, that is what I was told also.

Dall

[Koizumi]

Rear fog light

[ClickClickBoom]

Whew,
Did the heavy lifting for ya,
The entire thread explains that mystery wire, or go to post 10 or so.
LED conversion

[1989Carrera]

Originally Posted by ClickClickBoom

Whew,
Did the heavy lifting for ya,
The entire thread explains that mystery wire, or go to post 10 or so.
LED conversion

Yes, the mystery was solved when I read your post on May 28th. I genuinely appreciated your post.

[jjeffries]

Originally Posted by ClickClickBoom

Whew,
Did the heavy lifting for ya,
The entire thread explains that mystery wire, or go to post 10 or so.
LED conversion

Big thanks CCB. I had the gauges out of my SC this weekend to allow access for a wiring repair, so took them all out to install a kit of Norbert's LED'S I'd already procured. Labeled everything carefully, but after reconnecting, saw this Blue/White SOB and began to doubt my labeling. BUT....I recalled your thread and thus didn't waste a lot of time or energy. Much appreciated, John/CT.

[ClickClickBoom]

Glad it helped!