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Old 09-03-2010   #1
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speed pulse / abs system wire location

hi,
i've got a problem witch is my aftermarket HU requiring a speed pulse signal witch can be located in a fusebox area position 7 or 10 white/purple or green/white or blue/white wires as i found out, can some1 tell me what are these wires transmitting? as i dont want to screw something up that later will cost me loads to repair...
i've got a few images with the connector and the wire loom pointed with red arrows
cheers
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Old 10-03-2010   #2
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Re: speed pulse / abs system wire location

What pulse are you looking for

OEM HU receives speed info (for auto volume) via the CAN network.
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Old 10-03-2010   #3
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Re: speed pulse / abs system wire location

For an aftermarket sat-nav head-unit, but without using CAN as the signal converters are very expensive.
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Old 10-03-2010   #4
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Re: speed pulse / abs system wire location

Quote Originally Posted by danhans115 View Post
For an aftermarket sat-nav head-unit, but without using CAN as the signal converters are very expensive.
Can't do on a stilo.
You need to buy a CAN to signal converter. Vehicle speed is calculated by the ABS unit, based on the average of two of the wheel speed sensors. It then transmits it over the CAN bus to instrument cluster / radio etc.

When I got my stilo, it had one fitted, for something that had been removed by the previous owner. I threw it away over a year ago. Oops!
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Last edited by john55; 10-03-2010 at 16:41.
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Old 10-03-2010   #5
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Re: speed pulse / abs system wire location

the op could back probe the actual sensor.. an electronic converter for that would not be as dear (assuming the HU needs one at all)
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Old 10-03-2010   #6
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Re: speed pulse / abs system wire location

Quote Originally Posted by 12[X] View Post
the op could back probe the actual sensor.. an electronic converter for that would not be as dear (assuming the HU needs one at all)
The sensor does not put out wheel speed. It puts out something like wheel speed * 50 or however many teeth there on the reluctor ring.
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Old 11-03-2010   #7
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Re: speed pulse / abs system wire location

Quote Originally Posted by john55 View Post
Can't do on a stilo.
When I got my stilo, it had one fitted, for something that had been removed by the previous owner. I threw it away over a year ago. Oops!
well they are from about 50 on ebay going to about 80 as i noticed so you should have considered keeping it. but the thing is that i've been told by a bloke in the avicx1 forum(pioneer avicx1bt is the HU in the car) that it's them positions on the cable witch is in pic 1 for getting a speed pulse, i'm not sure it might take the abs signal, but i just need to know where to look for it
as i just dont want to spend 50 on a plastic box that i dont need...
well there's not much of an option if there isnt one...
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