speedometer and odometer inoperable

[cabin]

So I am having an issue with the speedometer and odometer not working on my e30.

Where does the odometer get its signal from? Does it use the speed sensor in the diff?

I have already checked the wiring at the diff and it's OK. I'm wondering if the speed sensor may be the culprit here.

[Gregs///M]

Replace fuse 10, 12, and 21 and it will work again. They are all 7.5A fuses. This is assuming you did a good job inspecting the rear diff speed sensor wires.

[cabin]

Thanks for the reply Greg.

I should have mentioned it in the first post, but I already replaced the fuses which didn't change a thing.

I didn't just inspect the wires, but replaced probably the last 12 inches or so with new wire and spade terminals. Eventually want to find an OE connector, but that's a separate topic.

[DaveSmed]

The sensor is easy to check. Unplug it, and ohm it out while spinning the driveshaft. it should alternate between open and closed circuit.

[Gregs///M]

The signal enters the cluster via the brown/red wire in the white plug, it should show a pulsed signal when the wheels are spinning.

If you confirm all your power and signal is there, your speedometer/odometer assembly probably failed which is a very common problem with VDO gauges. We can certainly fix it for you.

[noypi2]

The signal enters the cluster via the brown/red wire in the white plug, it should show a pulsed signal when the wheels are spinning.

If you confirm all your power and signal is there, your speedometer/odometer assembly probably failed which is a very common problem with VDO gauges. We can certainly fix it for you.

Mine works intermittently after I replace the gears. Can you PM the cost of fixing the speedometer/odometer assembly. Thanks.