Mystery wire?
That wire is very likely from the rear defogger. In 1976 vettes they had the option RPO C 49 which was rear defogger. It had glass heating elements instead of the old style blower type in previous years. Your original window must have been broken/ busted out. Is your rear glass now unheated? If so it ( the original)was more than likely replaced with a non heated ( probably less expensive) back window.
Check date too!
Hope this helps,
Tooch
Last edited by Tooch1; Feb 12, 2017 at 05:02 PM.
That wire is very likely from the rear defogger. In 1976 vettes they had the option RPO C 49 which was rear defogger. It had glass heating elements instead of the old style blower type in previous years. Your original window must have been broken/ busted out. Is your rear glass now unheated? If not it was more than likely replaced with a non heated ( probably less expensive) back window.
Check date too!
Hope this helps,
Tooch














