Question:
2003 Chevy S-10 ZR2 4x4 4.3 L Vortec.
I REPLACED THE TCCM.
Question = THE FOUR WHEEL DRIVE DOES NOT WORK AT ALL. THE
TRANSMISSION WAS REBUILT IN THE SPRING AND WHEN I WENT TO
ENGAGE THE 4WHEEL DRIVE THIS MONTH, NOTHING WORKS. THE
PUSH BUTTON SWITCHES FOR THE 4X4 ON THE DASH DOES NOT
LIGHT UP. WHEN HOOKED UP TO THE SNAP-ON MODIS SCANNER, IT
SAYS THERE IS NO COMMUNICATION WITH THE TRANSFER CASE.
IT DOES COMMUNICATE WITH EVERYTHING ELSE. I CHANGED THE
TCCM AND NO LUCK. I LOOKED AT A WIRING DIAGRAM AND THINK
THE NUMBER 6 PIN SHOULD HAVE POWER, IT DOES NOT. I DO NOT
KNOW WHAT TO DO NOW? ANY HELP?
Answer:
A long as you are looking at the correct schematic- there are 2 different
transfer cases, so 2 different modules- then yes, pin 6 should have
power. First check the fuses. If all OK, you are going to have to trace that
wire. Then you will need to check for that circuit having continuity
through the relay block. There could actually be an open circuit inside
that. As a last resort, you could actually run your temporary own wire to
make sure this fixes your problem.