Speedometer doesn’t work - broken gauge cluster?

[slowcar88]

Hello - been trying to figure out a dead speedo issue. Would appreciate any help.

only my speedo doesn’t work, it’s complete dead (not intermittent), everything else is functional. Would this suggest a bad cluster board? Or capacitors?

it’s a 1988 so the stomp test doesn’t work
the obc function reads speed accurately which leads me to believe the speed sensor is fine

[shogun]

go to my website below, click in index fixes>>>instruments>>>>>Replace blown resistor in speedometer: -- symptoms, write up and photos
01/1988 E32 735i, cluster with grey backplate.

Symptoms:
Speedometer not working at all on 01/88 model 735i. Swapped a different cluster in from another 88 and the speedo works fine (but the gas gauge is intermittent in the other cluster).All other instruments work fine in cluster.

Diagnosis:
Blown resistor on speedometer gauge.

[slowcar88]

Thanks again! Seems straightforward enough