What is the correct needle sweep when switch is turned on? Is there one?

2

2005RB

Member
Hello all,
I have a 2005 Ridgeback with 1970 original miles that I just purchased. It runs great and has no apparent electrical problems. The speedo seems to work perfectly. My question is about the needle sweep when the ignition is turned on. when first turned in it sweeps negative below zero and then up to 20 mph. If I cut it off and back on immediately it goes negative and back to zero mph. Is that normal? Or do I have an issue? Is there a significance to the sweep? Thanks in advance for the help!
 
mjsk9

mjsk9

Well-Known Member
2005RB said:
Hello all,
I have a 2005 Ridgeback with 1970 original miles that I just purchased. It runs great and has no apparent electrical problems. The speedo seems to work perfectly. My question is about the needle sweep when the ignition is turned on. when first turned in it sweeps negative below zero and then up to 20 mph. If I cut it off and back on immediately it goes negative and back to zero mph. Is that normal? Or do I have an issue? Is there a significance to the sweep? Thanks in advance for the help!
Click to expand...
Here you go.... Full explanation of what is taking place….

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1 B.M.F.

1 B.M.F.

Well-Known Member
What is the pulse count???? I don’t have a clue about this..actually never heard of a pulse count!!!
 
S

Sven

Well-Known Member
RAM = Random data that is volatile, meaning, it is wiped out and begins at zero (0000 < Binary number) when key is turned back on.
ROM = What is programmed into the chip on the motherboard. Reads only memory, or what was burned into the chip and cannot be changed, etc., as stated above, meaning, someone can reflash the chip.

Key on, the chip says to wipe the RAM clean and revert back to a clean slate = 0000. Here is what I don't know if we say; my ride of the day was 19.9 miles. Does the computer chip take in the .1 mile that did not complete a mile and be wiped when turned off, or did the chip hold that incomplete mile and save it to add to the meter or not?

To find out, you should see a mile clocked once you add that .1 mile the next day or the speedo reads 0000.0 on the speedo and it takes a full .10 to add that one mile to the speedo. So each time you stop the bike, the memory did or did not add those tenths to save.

Said another way... A computer bike/car starts at zero (0000). So did it save all those random 10th's of a mile or not?

Make sense?
 
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