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Location: Ontario, Canada
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colour of the wire for the stock 944 shift light
hey, does anyone know the colour of the wire to the stock 944 shift light in the tach?
my car had one at one point, and when I pulled the cluster last year, a bulb socket different from the rest fell on the ground and I found a wire (if memory serves it was a black wire with green stripe).... I'm wondering if this is the shift light...
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-16-2007, 07:34 PM
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Could it be called the "Illumination Potentiometer" in the electrical diagrams? I find it in the back of the Haynes Manual. I do not see a "Shift Light" or "Shift" anything anywhere. This thing is connected to the speedo. It says "Grey/Blue" and "Gr" for the wire colors if that helps you any.
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John '87 944 N/A (first Porsche) '95 E-350 Diesel '03 S-Type Jag 3.0 '03 Taurus SES '06 Eddie Bauer Explorer RIP SoCal |
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07-16-2007, 07:57 PM
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hmm.. illumination potentiometer...
you know, i have no idea...
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-16-2007, 08:44 PM
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Google is your friend
"The present popular usage of the term potentiometer (or 'pot' for short) describes an electrical device which has a user-adjustable resistance. Usually, this is a three-terminal resistor with a sliding contact in the center (the wiper). If all three terminals are used, it can act as a variable voltage divider. If only two terminals are used (one side and the wiper), it acts as a variable resistor. Its shortcoming is that of corrosion or wearing of the sliding contact, especially if it is kept in one position." |
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07-16-2007, 08:51 PM
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I know what a potentiometer is... lol :P
I just dont know if that's what they call the shift light..
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-16-2007, 08:53 PM
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I doubt it. I am guessing it is the cabin dimmer.
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07-16-2007, 09:22 PM
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oh that makes sense...
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-16-2007, 09:54 PM
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Well thanks for the info! I still do not see a "shifter light" in the diagram.
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John '87 944 N/A (first Porsche) '95 E-350 Diesel '03 S-Type Jag 3.0 '03 Taurus SES '06 Eddie Bauer Explorer RIP SoCal |
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07-17-2007, 06:13 AM
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Let's go shooting.
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Quote:
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1983 944 Lux (manual) 2.5 litre 8 valve na and no pas 1991 944 (automatic) 2.7 litre 16 valve na and pas "I have only five words for you: From my cold, dead hands." |
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07-17-2007, 04:41 PM
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Wow sorry guys, i just reread my posts and i came off as a real *******, sorry 'bout that.
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07-17-2007, 07:52 PM
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no worries - didn't think twice about it..
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-17-2007, 08:00 PM
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cold starter
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I think Porsche called it CASIS Computer Aided Shift Indicating System if I recall correctly.
Does anyone know how the DME decides when to illuminate the light? How does it know when to shut the light off when you push the accelerator down without a throttle position sensor? Is it a rate of change in the AFM threshold?
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88 Turbo S Silver rose: Megasquirted fuel, assorted suspension upgrades, etc. 89 944 S2 with 968 engine: Race car 87 944: Chump car build in progress |
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07-18-2007, 08:36 AM
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Wow, I didn't even know there was a shift light... does it come in all 944s? If so I guess mine doesn't work
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1989 944 n/a |
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07-18-2007, 10:44 AM
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a lot of previous owners cut the bulbs out because it gets annoying (apparently).
I'm 90% sure that all 944's have it...
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-18-2007, 04:48 PM
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It's a liitle orange light on the top part of your tach. It comes on to tell you when to shift to help you save gas.
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John '87 944 N/A (first Porsche) '95 E-350 Diesel '03 S-Type Jag 3.0 '03 Taurus SES '06 Eddie Bauer Explorer RIP SoCal |
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07-18-2007, 04:52 PM
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Let's go shooting.
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I've looked on mine with the dash out and the only bulbs present are for illuminating the clocks when the main lights are on. No black wire with green tracer I'm afraid.
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1983 944 Lux (manual) 2.5 litre 8 valve na and no pas 1991 944 (automatic) 2.7 litre 16 valve na and pas "I have only five words for you: From my cold, dead hands." |
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07-18-2007, 05:01 PM
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Now that I think about it... I doubt there is a wire. It should be a part of the circut on that green ribbon backing with a blub holder that you put the bulb in and twist into the socket. That's how all the rest of the blubs are back there. Does that make sense???
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John '87 944 N/A (first Porsche) '95 E-350 Diesel '03 S-Type Jag 3.0 '03 Taurus SES '06 Eddie Bauer Explorer RIP SoCal |
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07-18-2007, 05:04 PM
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our bulbs dont twist in, the early cars are different than your 87, John...
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Kyle 2008 Mini Cooper // '83 Porsche 944 // '01 Mazda Protege [sold] // "Never break more than you fix!" - SoCal Driver |
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07-18-2007, 05:19 PM
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SORRY! I thought you were trying to trick me!
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John '87 944 N/A (first Porsche) '95 E-350 Diesel '03 S-Type Jag 3.0 '03 Taurus SES '06 Eddie Bauer Explorer RIP SoCal |
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07-18-2007, 05:20 PM
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The upshift indicator circuitry is inside the tach, so no separate bulb and socket. FSM says replace the tach if the bulb burns out! Is it possible that the extra socket/wire is for the "time to change the O2 sensor" warning light located between the tach and speedo? I'm not exactly what year/model had this "feature".
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Edek '87 924S '91 535i |
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07-18-2007, 05:56 PM
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