No high beams
 

I have a 1991 RX-7 covert and have no high beam headlights . I understand I need to replace the high beam headlight computer module and where can I find one. Mazda dealers no longer have them . Looking for a place to purchase this module and suspect it will be a used one. It would be great if I could have high beams especially on dark country roads.

Have you already tested the dimmer relay. If so, then the 2nd gen parts classifieds forum (on this site, though you need to have 10 posts to use the classifieds) would be the place to find a replacement.

Placing a ground to the White wire of the relay should cause the brights to come on if the low beams are already on. If this turns the high beams on then the dimmer relay is actually good and the problem lies elsewhere (such as the dimmer switch in the cluster).