In Reply to: More questions.... posted by Zeroster on June 08, 1999 at 05:20:23:
Peek inverse voltage is a measure of the reverse bias a diode can handle before it self destructs. In automotive applications a diode will normally never see more that 16V. A PIV rating of 50 volts should be fine. You can of course get diodes with higher PIV - they cost more and are physically larger in size.
Did you read my write-up on the Ungo install (see below)? In it I give a Radio Shack part number for a package of 25 diodes (it is 276-1653) of the 1N400x type (the bigger x is, the higher the PIV (1=50PIV, 2=100, 3=200 etc.)). You will get a mixed set, but all will work.