Which is the HDD activity wire in a uncut ATA133 cable?

[Skiguy411]

I just bought this cable, but im not sure which wire is the HDD activity one. I know on the standard xbox cable it is pin 39(one wire in from the opposite of the red strip). Help!

 

[farmercal]

Correct me if I am wrong but I thought the HDD activity wire cable was two wire and connected to motherboard and to the LED. But if you are talking about something over my head...why would you want to know?

 

[Skiguy411]

The IDE cable is going into the xbox, to which I have added a hard drive activity LED to it. On the stock cable, you had to seperate a wire on it to connect to the ground of the LED. However since I am replacing that cable with one that has alot more wires on it, I dont know which one is the HDD activity wire.

 

[LTC8K6]

The 80 wire cable uses the same pinout and signals as the 40 wire cable. Every other wire is just a ground. It would probably be one wire over from the one on the 40 wire cable.

EDIT: That should be 2 wires over as the wire next to it will be grounded.

 

[Skiguy411]

dp

 

[Skiguy411]

Originally posted by: LTC8K6
The 80 wire cable uses the same pinout and signals as the 40 wire cable. Every other wire is just a ground. It would probably be one wire over from the one on the 40 wire cable.

EDIT: That should be 2 wires over as the wire next to it will be grounded.

Thank you so much. I love you :heart:

 

[LTC8K6]

The idea was to separate each signal wire with a grounded wire to improve the signal and eliminate crosstalk. Thus you end up with 80 wires but still only 40 pins. Either the odd wires or the even wires can be the grounded ones. A quick check should show how the cable is set up.

On a side note, if pin34 is not grounded the system "knows" you do not have an 80 wire ultra ata cable.