Thanks guys..... Here's the answer...

by David Orth


... Been working on this for awhile I finally figured it out this morning. The original tail light sockets are a type Ba15D which describes the opposing symmetrical (vs off-set) pin configuration of the Studebaker (Mazda brand) original 1158 bulbs. See page 92 of the M series parts manual. Turns out the correct 12 volt upgrade tail/stop lamp is an 1176. This lamp has the same dimensional specs as the 1158 but is 12 volt. Check out this O'Reilly Auto page.

Posted on Jun 19, 2017, 11:18 AM
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