no overdirive 1992 Ram

HI, 1992 5.2L D150. Was just wondering if anyone had any info about the OD off/on switch on the automatic tranny. I recently lost O/D on my (still)
fantastic running truck and was wondering about that switch on the dash. What is the default? if the wires are shorted can I expect OD or not? If the switch is bad can I expect no OD? Haynes manual doesn't even mention this as far as I can tell. Thanks for any input.
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Have you checked fuse #2 in the fuse panel below the steering column?
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Disabling the switch (in my case, disconnecting it from the truck) means OD cannot be switched off. PCM automatically assumes the truck will be operated in OD capable mode. Thus a broken switch would likely be lack of OD lock out.
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