George: Here is a chart for '58 Chryslers from: http://autolumination.com/ Unfortunately, it's unclear as to whether your courtesy light is the 1004 or the 90. I've seen more comprehensive sites as this starts with '58's. Further down is an excerpt from the '57 Chrysler Service Manual, available for viewing at: http://www.jholst.net/57-service-manual/electrical.pdf It only references the 1004. The '59 bulb chart can be viewed at: http://www.jholst.net/59-service-manual/electrical.pdf and confirms the 1004 is probably the correct bulb. Rich Barber Part #s and Upgrades available for: 1958 CHRYSLER Full Size Application Part # XtraVision LongLife Low beam headlamp H5006 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png High beam headlamp H5001 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Parking light 1034 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Front turn signal 1034 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Rear turn signal 1034 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Tail light 1034 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Stop light 1034 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png License plate 67 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Back up light 1073 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Ash tray 57 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Map light 1004 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Dome light 1004 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Step/Courtesy light 90 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Step/Courtesy light 1004 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Trunk/Cargo area 1003 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Under hood light 1003 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Clock 57 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Directional signal indicator 57 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png Radio dial 57 http://www.sylvania.com/Style%20Library/sylvania/images/icons/checkmark.png >From the '57 Service manual: ELECTRICAL LIGHT BULBS Number Mazda CP. or Chrysler Required Number Watts Part No. Headlights (Seal Beams) .. 2- 5400 50-40 W 1648133 Headlights (4) (Seal Beams) Inner High Beam Only. 2 4001 37^ W 1753435 Headlights (4) (Seal Beams) Outer High and Low Beam 2 4002 50-37H W 1753436 Headlight Beam Indicator Light. 1 57 2 127934 Parking and Front Turn S i g n a l . . . . . . .. 2 1034 32-4 151567 Rear Tail, Stop and Turn Signal Light. 2 1034 32-4 151567 License Plate Light 2 67 3 142450 Glove Box Light. 1 57 2 127934 Instrument Lights 4 57 2 127934 Map Light. Imperial 1; 1004 15 151578 C-75, C-76-2 Turn Signal Indicator L i g h t . . . . . . . . . . . 2 57 2 127934 Dome Light 1 or 2 1004 15 151578 From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of George McKovich Sent: Friday, January 04, 2013 3:42 PM To: Intl 300 Subject: [Chrysler300] Courtesy light bulbs? Happy New Year... Does anyone know the correct light bulb for the REAR courtesy lights on a 57-59 300 convertible?? Any help would be appreciated. Thanks George [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/