Briggsman
Newbie
I have a 1994 c1500 4L60E two wheel drive. Does not shift up and speedo doesn’t work. Pull tranny fuse and you can upshift and down shift manually. Cleaned trans electrical connector, new VSS, new ignition switch, checked fuses under dash, no codes. With tranny fuse in and key in run position, tested connector into transmission results as follows:
Black/yellow stripe 5v
Pink 12v
Red 12v
Blue 12v
Pinkish 12v
Purple-ground
Other wires: white, etc show nothing (voltage or continuity to ground)
Wondering if ECM could be possible issue. (When I set timing on engine to TDC then reconnected wire under glove box, computer advanced timing all the way past timing tab)
Black/yellow stripe 5v
Pink 12v
Red 12v
Blue 12v
Pinkish 12v
Purple-ground
Other wires: white, etc show nothing (voltage or continuity to ground)
Wondering if ECM could be possible issue. (When I set timing on engine to TDC then reconnected wire under glove box, computer advanced timing all the way past timing tab)