PCM fuses keep blowing @#$%^#@

So my car a 00 crown victoria on air ride has a problem. My PCM fuses keep blowing and once one blows my car dies. There are two fuses that blow one of them is to PCM Power Relay, PCM, DLC (OBD-II connector) the other fuse is to Anti-lock brake module, Evac and fill connector. Im not 100% on this but I think the problem is with  the wiring to my pressure switch. I have a toggle switch on the dash to turn the pressure switch on and off  and whith the switch on i tested my cars battery. I tested contineuity between hot and ground and found that sometimes they are shorted out when the switch is on and goes away with the switch off. The wiring to the pressure swith just goes from teh battery to the toggle switch and then fromt the toggle to the pressure switch and then the pressure switch controls a relay that operates my compressors. I thought there may be a short in the wiring (which was ran underneath the car) so i ran new wire inside the car this time and tested the battery again and didnt have a short this time however after driving the car for a while it shorted out and blew a PCM fuse. Ive tried replacing the toggle switch but that didnt help. Ive tested the pressure switch and its not shorted out internally or anything ive looked over the car for any sign of any damage to the wiring harness and couldnt find anything. Anyone ever encounter this before or have any idea WTF is going on with my car?

have you checked the pcm itself to see if its damaged? I woul check all the connections and do a thorugh check on the wiring to make sure there aren't any bare spots or cracks in the wires.  I know you have already looked onc but I would look again to be sure. If you have another pcm handy try andd switch it out to see if that does anything. I don't realy know much about wiring but I am about to be taking a class on it at school. Im trying to help though. ask russ d. mabye he can help.

Ill have to get my hands on another PCM to test. Last time it happened was about 5 minutes after i dragging the car<!--session data-->

im assuming you have a hot strait from the battery to the switch then to the pressure switch? your not tapping a wire under the dash?

---------------------------------------------Originally posted by bagged85im assuming you have a hot strait from the battery to the switch then to the pressure switch? your not tapping a wire under the dash?--------------------------------------------- that is correct hot straight from the battery.<!--session data-->