Thanks for responding everyone. Andrew...not 100% sure but here's the deal. It's a used ENC to start. Having trouble with the tach and headlight working and not working intermittently and can't find a reason for either one when trying to track it down other than it being in the EHC. If you have a better suggestion I'm all ears. Thanks in advance for any info.
Tach ring could be bad, it's a very common problem, especially with older models. Does it not work at all, or flashes on and off? Sometimes dirt covers the sensor on the front of the tach ring and can lead to having it flash on and off brightness wise.
Headlight can be caused from bad connection in headlight bucket. They also had problems with the plug melting and will cause your intermittent problem. Have you looked inside the bucket?
Also, wires under fuel tank can sometimes get chafed and cause intermittent electrical problems.