New hunch, the test for p0753 is GARBAGE. It only tests the circuit for the 1-2/4-5 solenoid, and only gives possible failures of that circuit or the computer. News flash to the fine folks who wrote that garbage, improper power supply can cause that code. Thanks DiamlerChrylser. (And the wiring diagrams have several wrong colors and some wrong terminal numbers. That's REALLY handy.)