93 Wrangler keeps blowing Fuel/ECM Maxi Fuse

[touverson]

I just replaced the automatic transmission in my 1993 Jeep Wrangler w/ 4.0. I dorve around the block several times and it ran fine. I went out on the highway to go to the exhaust shop and the fuse blew. All wiring was checked and nothing is pinched or burnt. Fule pump was pulled out and pumps fine. Unpluggged fuel pump and replaced fuse. When I turned the motor over the fuse blew. I unplugged the Crank Position Sensor and when I cranked it the fuse blew. Any Ideas, this is driving me nuts.
thanks
touverson

	Crank position sensor A crank sensor is a component used in an internal combustion engine to monitor the position or rotational speed of the crankshaft. This information is used by engine management systems to control ignition system timing and other engine parameters. Before electronic crank sensors were available, the distributor would have to be manually adjusted to a timing mark on the engine.

[dandoc]

Have you checked your ground wires? Make sure they are connected properly. Just to clarify, this is only the fuel pump fuse that continues to blow, correct?

[touverson]

I will check the ground wires when I get back to town. Yes this is the only fuse that keeps blowing. Thanks
Touverson

[touverson]

I found the problem. When I removed the transmission I removed the exhaust pipe and O2 Sensor. I purchased a new Bosch O2 Sensor and installed it last. I unplugged the O2 Sensor and it never blew again. I dont know if the new sensor is faulty or what but I put the old one back in and it works.