Pioneer DEH-P2600

About a year or so ago i bought a Pioneer DEH-P2600 it has worked like a champ every time i have used it. the truck (1992 Isuzu Trooper) that it is installed in is temporarily out of service (engine being built). Just last week a freind of mine bought a used jeep with a P2600 in it but did no have a face plate, i took the liberty of puting it in my other truck ( 1990 Dodge RamCharger) thinking that i can have the same head unit in both of my trucks and use a common face plate for both. i can only drive one truck at a time. Everything, i mean everything works except for the volume control. any advice would be an asset in figureing out this problem, my next step is to try and find my remote and see if the volume control will respond. anyone with input on this, just let me know what you think, Thanks.   

does the unit have no vol control on BOTH vehicles or only one or the other??Kevin Gerry

Certified Electronics Technician

MECP First Class Installer

Owner/Installer

Classic Car Audio

since 1979