Electronic speedo expert?
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Cargo Master
Joined: Dec 2003
Posts: 2,734
Likes: 38
From: Sunny Florida
I was looking into designing a tone wheel that would mount to the yoke of a 9 inch and this will affect the number of pulses per rev.
So I was wondering exactly what the system is looking for in terms of pulses and any other signal related things. I am no electrical expert.
Things may change a bit since a some one on this site welded a tone wheel inside of his 9 inch so there maybe more room inside the 9 inch than I thought for a tone wheel. Maybe I can make a tone wheel that will bolt inside of the 9 inch and make things easy for everyone. thanks bob
So I was wondering exactly what the system is looking for in terms of pulses and any other signal related things. I am no electrical expert.
Things may change a bit since a some one on this site welded a tone wheel inside of his 9 inch so there maybe more room inside the 9 inch than I thought for a tone wheel. Maybe I can make a tone wheel that will bolt inside of the 9 inch and make things easy for everyone. thanks bob
Post Fiend
Joined: Oct 2003
Posts: 6,214
Likes: 13
From: New Jersey
the existing speed sensor on the 92-96 pickups essentially shorts its output lead to the cluster/ECM to ground with every pulse. The cluster provides a pullup resistor so this sensor can create negative edge pulses that the cluster conditions using the PSOM module, and feeds to the ECM.
Its a very simple sensor... essentially a switch.
Its a very simple sensor... essentially a switch.
speed odmeter problems
