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I have seen this problem a few times and it was a shorted wire on the transmission valve body under the side pan. The wire actually shorts out on the metal pan. That side pan can be a pain to remove but it can be done without droping the transmission. Your other option would be to install some inline fuses to each leg of the circuit and see which one of them blows.
Does the shorted wire provide power to the pressure control solenoid? Would this explain the short circuit to the pressure control circuit code p1747? Is there a way to reach this wire from the bottom of the tranny. Do you have to remove a lot from the front left side to gain access to the side cover? Could you also explain where I could find the legs of each circuit to try the inline fuses or give me more details on how this is accomplished. Again i thank you for your advice I just need more of a detailed explanation of how to do this.
Thanks again for your advice but still have question or two. Where exactly is the canister vent solenoid? Is it located near the gas tank or on the firewall in the engine compartment? As far as the tranny can you hook it to the red wire in the block connector on top of the transaxle. I'm just asking where the easiest place is to put the inline fuses to test each area. Again thanks for your patience and very good info. I'm hoping the short is not in the tranny as I have seen a demontration on another ford taurus website which has pictures and complete explanation of how to remove the side cover if the epc should be bad. Really does'nt look like fun. Thanks Kerry.