Hi could anyone tell me if the hold button on a 94 roadster autobox has a seperate fuse to supply power to it a couple of weeks ago i blew a fuse in the radio line and since then it has not worked, but look as i may i cant find which one it is any help gratefully accepted
I can’t directly answer your question, but when checking fuses you should generally try replacing them (or checking continuity) rather than just looking for a break - they can look intact and still have blown.
I wouldn’t have thought that they would have been related in anyway, but stranger things have been known to happen.
http://www.madracki.com/miata/images/wiring/94sys.pdf
These are the wiring diags for your year, the bit you want is at the lower left on page 31. I can’t find any info about the “Power train control module” but it appears to have two power feeds, 1 from the Room Fuse, the other from the Meter fuse. You can find the fuse layouts in the electrical FAQ HTH 