Want to save 10ma?
#16
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It appears Porsche had/has a design problem, or their thinking was to have the
bulb light when the key if off. A simple solution is to cut the circuit track to the
power side (#30) of the bulb & jumper to the #15 power which connects to the
other bulbs.
bulb light when the key if off. A simple solution is to cut the circuit track to the
power side (#30) of the bulb & jumper to the #15 power which connects to the
other bulbs.
#17
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Originally Posted by Lorenfb
Has anyone verified the current reduction using a meter???????????
Originally Posted by Lorenfb
Bottom line: Bulb should NOT be removed on cab vehicles. For non-cab vehicles, a central informer fault may exist requiring a reset of the central informer at startup.
- Remove the time clock.
- Break the connection from lamp socket #2 (Arrow "A")
- Remove the insulating coating on the current track at arrow "B"
- Using a short length of wire, connect point "C" of resistor to point "B". Solder connections using a low wattage, small tip soldering pencil. Be certain no other conenctions are made or bridged.
- Reinstall time clock.
#18
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Originally Posted by Lorenfb
It appears Porsche had/has a design problem, or their thinking was to have the
bulb light when the key if off. A simple solution is to cut the circuit track to the
power side (#30) of the bulb & jumper to the #15 power which connects to the
other bulbs.
bulb light when the key if off. A simple solution is to cut the circuit track to the
power side (#30) of the bulb & jumper to the #15 power which connects to the
other bulbs.
#19
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"I'm still confused about why the bulb is there, and what the implications are of removing it for a non-cab 964."
The bulb provides an indication of a cab top ECU fault.
1. The bulb should NOT be removed on a cab top vehicle;
a. no cab top fault indication
b. A central informer general fault may occur.
2. The bulb should NOT be removed on all other vehicles;
a. A central informer general fault may occur.
Bottom Line: If a reduction in standby current is desired, then the mod outlined
before should be done, i.e. use #15 power to power the bulb & not #30 power.
This should be about a 5 minute effort.
The bulb provides an indication of a cab top ECU fault.
1. The bulb should NOT be removed on a cab top vehicle;
a. no cab top fault indication
b. A central informer general fault may occur.
2. The bulb should NOT be removed on all other vehicles;
a. A central informer general fault may occur.
Bottom Line: If a reduction in standby current is desired, then the mod outlined
before should be done, i.e. use #15 power to power the bulb & not #30 power.
This should be about a 5 minute effort.
#20
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Well bill. Thanks for the info.
Ever since I had power problems last year Ive been wary of any power drains so I will take my clock out and check to see if lamp 2 is there or not. turned out to be duff battery but even so every little helps.
Thanks for bringing this to our attention.
Ever since I had power problems last year Ive been wary of any power drains so I will take my clock out and check to see if lamp 2 is there or not. turned out to be duff battery but even so every little helps.
Thanks for bringing this to our attention.
#23
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2.The bulb should NOT be removed on all [non-cab] other vehicles;
a. A central informer general fault may occur.
a. A central informer general fault may occur.
Is this caution based on first hand experience?
Last edited by Bill Gregory; 07-24-2006 at 04:34 PM.
#24
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"2. The bulb should NOT be removed on all other vehicles;
a. A central informer general fault may occur."
The signal from the cab top bulb was brought into the central informer for a reason!
a. A central informer general fault may occur."
The signal from the cab top bulb was brought into the central informer for a reason!
#25
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"2. The bulb should NOT be removed on all other vehicles;
a. A central informer general fault may occur."
The signal from the cab top bulb was brought into the central informer for a reason!
a. A central informer general fault may occur."
The signal from the cab top bulb was brought into the central informer for a reason!
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#26
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"Right....10ma It was really a plot by Porsche to sell more batteries, but when they figured out in 1994 it wasn't working,"
Sounds like a post from the "other" forum and hardly expected from a "super moderator".
It really doesn't provide insights to the issue, does it?
Again:
The central informer was connected to the bulb to sense the fault state of the cab top ECU.
The voltage at the bulb appears to provides info to the central informer:
1. "hi" - 12 volts (bulb not on), no cab top fault
2. "lo" - ground (bulb on), cab top fault.
If the bulb is removed, does the central informer "see" a "hi" indicating a "no fault"?
That's the issue which the thread hasn't answered.
Sounds like a post from the "other" forum and hardly expected from a "super moderator".
It really doesn't provide insights to the issue, does it?
Again:
The central informer was connected to the bulb to sense the fault state of the cab top ECU.
The voltage at the bulb appears to provides info to the central informer:
1. "hi" - 12 volts (bulb not on), no cab top fault
2. "lo" - ground (bulb on), cab top fault.
If the bulb is removed, does the central informer "see" a "hi" indicating a "no fault"?
That's the issue which the thread hasn't answered.
#27
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Sounds like a post from the "other" forum .
Sorry, but we'll have to agree to disagree on this one...Porsche issued a service bulletin which is very clear. Would you like me to email it to you?
#28
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Originally Posted by Lorenfb
If the bulb is removed, does the central informer "see" a "hi" indicating a "no fault"?
#29
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"In a coupe it will not register a fault and in a cabriolet you don't remove the bulb..."
Thanks Jason for clarifying the issue.
"My apologies if the icons didn't bring the intended sense of humor to the reply. "
I guess I've spent too much time in the PAST on the "other" forum
to appreciate real humor when it occurs versus attacks. Sorry for the
mis-interpretation.
Thanks Jason for clarifying the issue.
"My apologies if the icons didn't bring the intended sense of humor to the reply. "
I guess I've spent too much time in the PAST on the "other" forum
to appreciate real humor when it occurs versus attacks. Sorry for the
mis-interpretation.