My turn signals and exterior lights all work great, except the green signal arrows in the tach are reversed.

Any suggestions?

My tach is also intermittent. Related?

'73 240z

Edited May 28, 201311 yr by GeoJoe

The turn signal bulbs and sockets are interchangeable. Remove them from the tach and reinstall correctly. Do some searches on this site regarding intermittent tachs. There are several possible causes but none concern the swapped turn signal bulbs.

You can lay on your back, reach up and swap the sockets (with bulbs still in) at the back of the tach. No fun but it can be done.