How do I check if the speedo head is fried on my car? The trans hall sender is good. I don't know if it is the wiring, speedo head, or another component. By the way, it IS electronic. Steve '84 5ksT 1.6-2.0 bar Disclaimer:"Any information contained herein is based purely on my own personal experience and may not necessarily reflect yours. Use caution as your results may vary from mine."