'00 XJ Blower Motor and Torque Converter issues

[00XJ216]

Hi everyone, Ive searched on line for some answers and came up with nothing so I figured I would ask the experts here.
I have 2 issues on my 2000 XJ 4.0 Auto...
First, the blower for heat/AC works when it wants to. When its not working I wiggle every wire and nothing hapoens. The blower motor, resistor and control head have all been replaced with working good ones.
Thoughts?
Problem 2, I have a leaking trans pan seal. Drained fluid, dropped the pan, inetalled new filter and reassembled and filled with fresh ATF+4. I should say I had to drop the dip stick tube with the pan because it would not seperate. After install and refill, it started throwing troubke codes for Torque Converter Circuit P0740. I erase it and the code comes back immediately. Any insight or help would be greatly appreciated. Thanks!

 

[EvaB99XJ]

There is a blower motor relay hiding behind the glove box - you might try swapping it out with another relay from the fuse box under the hood to see what happens. Also, pull and re-seat the blower fuse in case it's corroded or making a bad connection.



If that doesn't work I'd get a wiring diagram and follow the power through the wiring with a test light to find the issue.

 

[lawsoncl]

Clean and check the connectors for the transmission on the passenger side of the firewall. Measure the resistance for the #3 solenoid at that connector as well. Should be 11-15 ohms. Since you pulled the pan, it's possible you pulled the wire off the solenoid.



Also it's a hotly debated topic, but many folks will swear you must use the originally spec'd Dex/Merc II and/or III in the AW4, and correctly point out that Aisen Warner has always said Dexron or compatible. Chrysler however has a service bulletin stating to use ATF 4+, and I've yet to see a failure or issue caused by using it. (The reverse however is true though, and use of Dexron in Chrysler trannys designed for AT4+ caused lots of early failures).


When the blower motor won't run, check for power at the blower motor either with a test light or with a voltmeter and the blower motor connected.