Ok our a/c compressor went out and at the same time the tranny stopped shifting correctly and the cruise wont work,If we jump the a/c relay the a/c engaged, I read the book and the only thing above the fuses and relay is the PCM/ECM could that be the problem? Is there a way to test this before I replace it?
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There are ways to bypass the system, but without knowing what the correct resistance in the chip is, its not going to be easy or cheap. There are a dozen or so different chips, each with a different resistance. The resistance completes the circuit for the VATS system sensor. You can buy a trick box to wire into the circuit, or have the computer changed to skip the VATS signal. As long as the computer you have now does not get the signal from the VATS the injectors will not work.
Whens the last time you changed tranny filter and fluid. it may be the vacuum modulator or your bands inside the tranny. Pull out your tranny dipstick when running and check level of tranny fluid. Add dextron II of needed. Smell the tranny fluid on dipstick to see if tranny fluid is burndt. if you change filter and fluid, add a can of trans-x to the fluid. Will help seals in tranny.
Sometimes, you have to start the vehicle, turn on the AC (Hi setting), and jump across (bypass) the low side pressure switch - to allow the compressor to start running and draw the freon in through the low side - make sure your fittings are correct and otherwise - Did you pull a vacuum on the system before you attempted to add refrigerant? I would highly recommend it - removes air and moisture....