OK guys my first post. I have a 1998 F150 Lariat truck and my head unit is kinda acting up. It has the tape deck buit into it. My brother in-law Kindly gave me his head unit (only used for about 1 month) from his 2002 Expedition. It also has the cd player + tape deck built into it. I have gone crazy and to three diffent stores looking for the wiring adapter (one guy from a radio install shop told me it could not be done) and could not find any. The unit I am trying to install is the Altec model number 2L1F-18C868 -AB. So where could I order the needed harness from. The unit has a 16 pin and 20 pin connections in the back.

Thanks for any help in advance.

 

I forgot to put the model numbers from the units on here so here we go.
The orginal unit is f75f-19b165-da. The replacement unit is Altec Part number 2l1f-18c868-ab. I believe the difference is the external amp on my truck and the newer unit has a built in unit.

 

I found the cable I need from replacement radios