ReplacementRadios, one of the largest factory audio/video websites, has branched out!! If you?ve been to our site, you know we have a HUGE selection of OEM radios and compatible accessories. Now we?re offering a few select products here too. Same great ReplacementRadios quality.....in a new location. DETAILS These plugs are intended to be used if you are trying to replace an OEM semi-truck/tractor radio with an aftermarket unit. They are female plugs, so they snap right over your existing factory plugs. They have the aftermarket standard wire colors, allowing for easy connection to the harness that came with your aftermarket radio. They are known to fit over the plugs used for the following radios, but please see the ** note below: 12213660 -- am/fm/cassette -- (Freightliner, Massey Ferguson, etc) 12213670 -- am/fm/cd -- (Freightliner, Massey Ferguson, etc) 12215835 -- am/fm -- (Navistar, Massey Ferguson, Kenworth, etc) 12215845 -- am/fm/cassette -- (Navistar, Massey Ferguson, Kenworth, etc) 12215865 -- am/fm/cd -- (Navistar, Massey Ferguson, Kenworth, etc) 12215880 -- am/fm -- (Peterbilt, Kenworth, etc) 12215900 -- am/fm/cassette -- (Peterbilt, Kenworth, etc) 12216310 -- am/fm/cassette -- (GM, Hummer, etc) 12216320 -- am/fm/cassette -- (GM, Hummer, etc) 12217670 -- am/fm/cd 12244285 -- am/fm/cassette -- (Mack, etc) 12244295 -- am/fm/cd radio (Mack, etc) 20928235 -- am/fm/cassette -- (Volvo, etc) 21003880 -- am/fm -- (International, etc) 21003882 -- am/fm/cassette -- (International, etc) 21225718 -- am/fm/cd -- (Volvo, etc) 21225721 -- am/fm/cd -- (Volvo, etc) 21356887 -- am/fm -- (Volvo, etc) 21197288 -- am/fm/cd -- (Volvo, etc) 28117802 -- am/fm/cd -- (Mack, etc) 28132530 -- am/fm/cd -- (Volvo, etc) 28134905 -- am/fm/cassette -- (Volvo, etc) 28161508 -- am/fm/cd -- (Volvo, etc) 28161510 -- am/fm/cd -- (Volvo, etc) 28317504 -- am/fm -- (Volvo, etc) 325061A2 -- am/fm/cassette -- (New Holland, Case, etc) 366631A2 -- am/fm -- (New Holland, Case, etc) 36MT522M2 -- am/fm/cassette -- (Mack, etc) 36MT522M4 -- am/fm/cd -- (Mack, etc) 36MT539M -- am/fm/cd -- (Mack, etc) 86998223 -- am/fm/cd -- (New Holland, Case, etc) We cannot guarantee they will work with any other radio besides the ones referenced here. Connection of these wires will be required in your vehicle. This will involve splicing. These plugs will have the aftermarket standard wire colors, so wire assignment is relatively easy to identify on the plug side. (See the standard color chart in the pictures attached to this listing.) These plugs are not fully loaded but every wire your current radio has should be accounted for. (Constant power, switched power, ground, dimmer, power antenna, and positive and negative for four speakers.) **Please note that some radios had the constant and switched power wires reversed. If yours is one of them, you will experience preset, clock, and other memory loss. If this happens, you merely need to switch those two wires (usually they're red and yellow) where you joined the loose wires from this to your wiring. (ie - Redo those two splices, switching the wires.) Appearance of the plugs may vary. In some cases one is brown. In others they are all black. In some cases they are joined together. In other cases they are separate. Pictures of both styles appear in this ad. You will receive whichever one we happen to have been sent by our supplier. Neither of the appearance issues has any effect on your ability to use the plug(s) if you originally had one of the radios listed in this ad. SHIPPING We will update this system with the tracking number. They will send you an email if you have your preferences set accordingly. The default method is First Class. If you want Priority Mail, that is an option. You just need to select it during check-out.