The tach is no longer working. I took the module off of my distributor to get it checked out. The car is a 91 camaro Z28 TPI. The module was good but when I put it back on I connected the plug backwards since the plug is broken. After that the module gave out so I bought a new one and connected right this time. Ever since that, the tach hasn't been working since. Any ideas?

 

Check to make sure that the pins didn't back out of the connector or that the wire isn't broken.