reversing lights on my 86

[British Bob]

they dont work, has been intermitant in the past, think it may be the switch.

Where is it??

 

[jmccloud]

Reversing lights

Check out this thread from a few days ago;
http://www.corvetteactioncenter.com/forums/showthread.php?t=80270
Also, if you do a search, look for 'backup lights'
Most of these failures that I've had resulted from a poor earth (ground) at the switch rather than an actually bad switch. Check it out.