Hall effect sender troubleshooting
Check for mechanical engagement.
Remove the speed sender from the cable output on the transmission. Leave plugged in.
Turn on the key,using a drill, spin the sender shaft. You should see action on the speedometer.
YES I see action on the speedometer when I spin the drill. This means if you see action with manual spinning but not when the sender is installed on the transmission that there is some sort of mechanical engagement issue. The sender is not being spun by the transmission.
- Check that the drive gear is in the transmission and spinning when tires are rotated
- Check that the drive gear square drive is not out of round. the spec is .014"x.104"
- on Ford style senders: Is the gear installed on the end of the sender? It was on the cable when it was removed.
NO I do not see action on the speedometer when spun manually