M101 Trailer lights which bulbs to use!!!

[onesurplus]

There are two bulbs in the tail light that need replaced when changing to 12 volts. What do you replace the 1683 bulb with? I was going to use led, but is it a 1156 or 1157? Then their is smaller bulb 1251. What do you replace that bulb with? Thanks Doug

 

[porkysplace]

24v to 12v conversion bulb numbers Google search on the toolbar is a great source for info.

 

[therealsundance]

1156 (turn, brake), 67 or 97(tail)