There are two bulbs and if you are careful they can both be replaced. I'm pretty sure the one on top that is easy to get to is the O/D light and the back light is the tricky one. No idea what the bulb is, I replaced mine with a surface mount LED and resistor I hacked into the plastic bulb mount.Reviving an old thread, but the other day I noticed the small, indicator light is out on when I push the O/D switch. @pagrey , is this the same light under the white cap or is that just the one that illuminates the O/D Off lettering when the headlights are on? And is the indicator light replaceable or will I need to find another switch? Thanks in advance...
Well it took me a month to get to it, but I finally pulled this out. After carefully removing the white light socket, I used a safety pin to unravel the two wire leads (this reminded me of Christmas mini light sets). The bulb did not appear burnt in any way so I attached the leads to + and - 12v power. No luck. I remember my dad saying, "give it a whack or two" for just about anything that wasn't working. Gave two finger flicks and BAM! Light works again. I reinstalled the light into the socket then back in the switch. I tested it each time I moved it around. This was a fairly easy fix. I'm hoping the next trail run doesn't jar anything loose but for now, seems to be working every time I test it!!!! Thanks @pagrey for the guidance.Now that I think about it mine was pretty corroded, you might pull it and make sure the filament is actually blown.
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I think this is it, if you can't find a new one you can unwind the wires and pull the bulb and just stick another low power grain of wheat bulb in there.