Since the change over to LED lighting is getting pretty popular I thought I'd add a key to the bulbs our truck's use for those wanting to change your truck's bulbs to LED...
97-03 Ford F150 Light Bulb Fitment Application List:

Parking light uses 3157A bulb.
Tail light uses 3157 (red)bulb.
High mount stop light uses 912 bulb.
License plate uses 194 bulb.
Back up light uses 3156 bulb.
Ash tray uses 37 bulb.
Dome light uses 912 bulb.
Dome light uses 578(festoon) bulb.
Step/Courtesy light uses 168 bulb.
Under hood light uses 912 bulb.
Note- some of these may vary on earlier trucks but it should all pretty much be the same

For instrument cluster swap info, check out 2000MTZ's write up here.... https://www.f150forum.com/f6/99-03-l...change-171349/

Also, on your turn signals you will either have to change your flasher module in the dash to an LED flasher(best fix though it will take longer) or wire LED resisters into the flasher harness at the light. If you don't they will flash too fast like you have a burnt out bulb.

A good place to get quality LED's and the flashers/resistors
http://www.superbrightleds.com/

You can also get them off amazon and eBay but quality will vary.

If anybody has questions just ask me or 2000MTZ and we'll be glad to help any way we can, and anybody else with experience can feel free to add info!!

 

a little more...

step/courtesy - 194 Bulb, can fit some oversized bulbs
Map lights - same as dome - 578 festoon
glove box - 194 bulb
Cluster for 97-98 - 194 Bulbs

I think that's all of them for interior lights, I have all the sizes needed for dash lights in my Cluster color swap thread which browningSCrew added above

 

Good stuff guys

 

This is perfect. The LED switchover is my next project after I finish my PTM toolbox.

 

Glad to help. Just started my swap with 3rd brake/cargo light, licenseplate, and hood light(since I had an extra)

 

Looks good. Looks like one of my next upgrades. Thanks for the info once again guys!


btw, i finished the big 3 how to..... heres a link for those interested!
https://www.f150forum.com/f6/big-3-how-97-03-a-174524/

2000MTZ and anyone else, feel free to add any pics or info you feel necessary.

 

Nice work boys.

 

which one is the 3rd brake light? i think on your guide its 912 but on superbrightleds.com its 194, at least that's the one that i kept getting when i searched for the 912 led replacement.

 

Does anyone know where I can get the LED flasher module? Also, where is it located on the truck? Part numbers and pictures would be awesome.

 

A 194 has the same base as a 912. The incandescent 912 bulb itself is slightly longer and wider at the top, but not at the base, where the connecting leads are. If you want, you can get a 194 LED with slightly more LEDs in the assembly that could be used (longer but not wider; to fit inside).