You should have replied to the post instead of posting a new question. Replies would be notified and the person attanding to you would response when notification is received. New questions might get overlooked due to the overhelming questions coming in.
Here is a diagram of the blower resistr, it is known as Rear Power Transistor.
Did you test the blower motor operations and power supply?
REAR POWER TRANSISTOR TEST
1 . Remove the driver's console side trim.
2 . Disconnect the 4P connector from the rear power transistor.
3 . Measure the resistance between the No. 1 and No. 2 terminals of the rear power transistor. It
should be about 1.4 - 1.5 kohm.
" If the resistance is within the specifications, go to step 4.
" If the resistance is not within the specifications, replace the rear power transistor.
4 . Carefully release the lock tab on the No. 4 terminal (WHT/RED) (A) in the 4P connector, then remove the terminal and insulate it from body ground.
5 . Reconnect the 4P connector to the rear power transistor.
6 . Supply 12 V to the No. 4 cavity with a jumper wire.
7 . Turn the ignition switch ON (II), and check that the rear blower motor runs. 7 .
" If the rear blower motor does not run, replace the rear power transistor.
" If the rear blower motor runs, the rear power transistor is OK.
Page 1 of 1 REAR AIR CONDITIONING -2003 Acura MDX
Tuesday, September 22nd, 2009 AT 2:51 AM