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Hello,
I purchased a 1974 F100 this summer and I am trying to find the size of the dome light bulb. The dome light bulb was not in the truck when I picked the truck up. I looked all over the web with no luck. Thanks in advance for your help!
The Sylvania 561 looks like the right one, but the one I recently bought and put in my 75 F250 was part number "212-2". Probably several different part numbers that are same, though, I dunno. Difference with the ones I have are metal caps on ends (the hooks are still there.)
they also differ in wattage and therefore heat. my po obviously put the wrong size in and now i have a hole in my dome light from the heat over the years.
I bought the clear dome light cover and a led bulb from lmc. Its absoutly amazing how much brighter it is now than before. Also there is no heat from the led bulb so you will never have to worry about replacing the cover when it becomes dry and fragile from the heat.