speeedo help please :(
Okay So I have a 91 e30 325i sedan.
When I got the car, the cluster was working, but the speedo and economy were in and out all the time but the tach was always working but off by 2-3000 rpms
So i took out the motometer cluster, and replaced it with a VDO cluster. Everything was working perfect, except the gas gauge. So the drove the car for an hour with speedo and everything working except the gas gauge. So anyways i swapped the gas gauge from the other cluster into this working cluster, gas gauge now works fine too.
However after replaceing the gas gauge on the cluster i left the car over night and this morning, back to original issue. No speedo no economy gauge.
Anyways So i've tried both speedos swapped em back and forth a couple times.. nothing works....
how can i test the speed sensor on the diff? to make sure its sending signal??
Input help anyone????