Recent content by Elmerwood
-
Rear ac unit on Yukon screaming
Thanks for the info Bill. I ordered the expansion valve from Amazon $20 and when I had time ran it to my friends shop to use his AC machine to drain before performing the swap. Changed the part and recharged the system. I've put probably 100+ miles since and no screaming any longer (knock on... -
Rear ac unit on Yukon screaming
With the rear ac off and the front running it makes that loud noise still while the car is idling in park. If I through some RPMs to it the noise goes away or lessens. When I turn the vehicle off you can hear the noise in the back wind down if you will for a few seconds after the vehicle is... -
Rear ac unit on Yukon screaming
I've tried turning every knob in every position but yet it still screams. -
Rear ac unit on Yukon screaming
Hello everyone, My wife's 2003 Yukon has a screaming rear ac unit. I've unplugged every motor and blend door actuator on the unit and it's still screaming. I work a hydraulics and the noise reminds me of oil going over a flow control or by a pressure relief. While it's screaming the lower... -
Did I lose my ECM? 03 Yukon dead in the water
Its alive! That connector was the issue. I cleaned it with electrical cleaner, electric tooth brush and air. Slapped it all back together and everything is back to normal. Going to leave my truck at my shop tonight and take her home for the evening. Thank you to everyone that pointed me in the...- Elmerwood
- Post #23
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
Well I tried what @TJ Baker was recommending and pulled the data bus splice comb and checked voltages on the pins inside and found 11+ volts on pin M & B. According to the drawings in the link I shared above M&B are the ECM and BCM. I pulled the ECM cover off and then the removed the electrical...- Elmerwood
- Post #22
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
Just watched a few youtube videos all about this which makes me hopeful I can find the issue tonight.- Elmerwood
- Post #21
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
I think I need to do what this gent wrote up. https://www.iatn.net/forums/13/54612/class-2-data-bus-shorted- Elmerwood
- Post #19
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
The numbers only appear for a.very short time so I had to take a video to capture them. This one reads 75. Another time it read 64 and one time a zero at each end of the display.- Elmerwood
- Post #15
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
@BG1988 in that picture of the dash, that was the last time.the vehicle was running and gauges went nuts. The only gauge that was.working was the speedometer, the others pegged to the left. That was Saturday. I put a brand new batter in on Sunday and has died twice just sitting in the vehicle...- Elmerwood
- Post #14
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
Tonight I tried videos I've seen "resetting the ECM" by placing the key in the on position for 10 minutes and then to the off position for 10 seconds. This process was repeated multiple times with no change in the vehicle. One thing I did notice is that when I turn the key off after leaving it...- Elmerwood
- Post #12
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
@TJ Baker thanks for the info. I checked my OBD2 port and pin 16 had 12V, pin 4 & 5 had continuity between each other and individually to a ground, pin 2 reAD 10.58 volts both times I checked it which seems odd when checked against your video.- Elmerwood
- Post #11
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
This is what the dash looked like when I lost all accessory power but was still able to drive the vehicle. I'm not sure.i follow you on if I can communicate with the other modules or not. I have tried 2 scanners and both won't connect/communicate with the vehicle.- Elmerwood
- Post #10
- Forum: Engine & Drivetrain
-
Did I lose my ECM? 03 Yukon dead in the water
*** EDIT *** forgot to mention that after I put the new battery in the vehicle Sunday morning it was completely dead Monday morning when I loaded it on my trailer. @TJ Baker I'm pretty sure I checked that but I'm going to give my positive and negative cables a once over again today and ring...- Elmerwood
- Post #7
- Forum: Engine & Drivetrain
