Lift gate and rear window not opening

2011 CADILLAC ESCALADE ESV
130,000 MILES
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Hi, I seen that you responded to a previous person close to my subject, I'm not getting power to fuse 44 which states it's the lift gate fuse but getting consistent power to other fuses LGM under hood and OBS Det in car, as well as BCM. from what I'm told fuse 44 gets power from 175 little fuse coming from battery... possible short or is this fuse intermittent? Tried hitting key fob and buttons to see if 12-volts will pass through it but nothing.

please any help would be grateful.
Dec 7, 2021 at 6:24 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good morning,

The fuse is powered by the relay. Once the relay is energized, it will pass current through the fuse to the window.

The relay is non-serviceable. It is part of the fuse block itself.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-wiring

You would need to verify power from the BCM to the relay to rule out the BACM as the failure. I highlighted the wire for you to test.

Let me know if you have any other questions.

Roy
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Dec 7, 2021 at 6:53 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Hi Roy,

I'm not seeing this PCB Relay for liftgate sir, any idea which one? I have a relay that is actually outside of the fuse box that has the same color wire as the motor to gate..
Dec 7, 2021 at 7:19 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
It is internal in the fuse block. You will not be able to see it or touch it. It is part of the fuse block itself.

You need to verify power from the BCM at the dark green wire as that is what feeds the relay.

Roy
Dec 7, 2021 at 7:25 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
i honestly can't even tell which green wire, I'm seeing green wires. not really a dark green but I'm still looking, is it coming from behind fuse box against fire wall?
Dec 7, 2021 at 8:13 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Look directly at the BCM itself. There are only three wires on the connector, and one is the dark green wire to the fuse block.

Roy

Dec 7, 2021 at 8:41 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Ah, thank you. looking now.
Dec 7, 2021 at 9:03 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Keep me updated.

Roy
Dec 7, 2021 at 9:22 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
trying to figure this out, I'm seeing a port with three wires... looks like a light green wire, but I'm not seeing those other colors next to it as shown in diagram.
Image (Click to enlarge)
Attached Media
Dec 7, 2021 at 9:56 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Brown port looks like it has dark green, but more wiring.
Dec 7, 2021 at 10:16 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
both of the green on the rose port have a black stripe.
Dec 7, 2021 at 11:27 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
sorry, there is one that is green with black stripe, it's reading 12v.
Dec 7, 2021 at 11:42 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
No stripe. The color is dark green.

Let me see if I can get a connector diagram for you.

Roy
Dec 7, 2021 at 1:59 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
I attached the connector diagram for you. I circled the wires that need power for the relay to work.

Roy
Image (Click to enlarge)
Attached Media
Dec 7, 2021 at 2:29 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Roy thank you for your time, sir, the information I'm sure is leading me in the right direction per your expertise, just wanted to say thanks. I will go out shortly again and check, the only thing is I'm not seeing those particular colors together. do you happen to know which connector that is being that they are color coded?
Dec 7, 2021 at 2:47 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
It does not define the color. You need to match up the wires with the connector. It is time-consuming.

Let me know if you have any other questions.
Dec 7, 2021 at 2:53 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
ok sir, no voltage at wire car on or off.
Dec 9, 2021 at 10:33 AM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
I opened up BCM to see if anything is burnt, just to get a visual. Just let me know where to go from here.
Dec 9, 2021 at 11:07 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
If there is no voltage, the BCM is bad and must be replaced and programmed to your VIN number.

There is no fixing it. It requires replacing the module.

Roy
Dec 9, 2021 at 1:01 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Thank you, sir. just ordered it.
Dec 9, 2021 at 1:25 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
You are welcome.

Always glad to help.

Let me know if you have any other questions.

Roy
Dec 9, 2021 at 1:35 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
wish there was a way to tip you...
Dec 9, 2021 at 1:42 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
No worries. Just give us a good review on Google.

Roy
Dec 9, 2021 at 1:44 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Hey sir, just got the BCM in and no voltage again... Is it possible there is a short that is stopping this voltage? Is there a wiring layout to where the power is coming in to give power to that particular wire?
Dec 15, 2021 at 12:16 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
The wiring was attached to your questions a while back.

Did you have it flashed to the VIN number after installation?

Roy
Dec 15, 2021 at 12:20 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Yes it was flashed.
Dec 15, 2021 at 12:30 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
So, there is a light blue wire that from what it looks like should have voltage, but it does not.
Dec 15, 2021 at 12:31 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
It was a dark green wire that feeds the relay, not blue.

Roy
Dec 15, 2021 at 1:01 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Got you... well, no voltage coming from it.... does this indicate bad BCM possibly?
Dec 15, 2021 at 1:04 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
How about this PCB relay? not sure where that is.
Dec 15, 2021 at 1:06 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Hi, on that little fuse 175, should i have continuity going through the test leads from one side to the other? if i test it I do not, but if i test voltage from one side to the other I see voltage but no continuity.
Dec 15, 2021 at 1:15 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
HI, sorry to retract above, but I am seeing continuity from ends when its off, but the middle test points show no continuity. does this matter?
Dec 15, 2021 at 1:21 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
So, those ends I get continuity but leads in center I don’t, but when hooked up I get voltage touching leads but no continuity .
Image (Click to enlarge)
Attached Media
Dec 15, 2021 at 1:26 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
When it is hooked up. do you have voltage on both sides of the fuse?

Roy
Dec 15, 2021 at 1:29 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Yes sir, so that is functioning, i guess? :)
Dec 15, 2021 at 1:38 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Correct.

Why are you testing this?

Roy
Dec 15, 2021 at 1:46 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
Honestly, I don't know, I"m just checking for voltage out from anywhere that leads to a possible issue.
Dec 15, 2021 at 1:50 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
You need to go to the wire I have identified for you at least 2 times at the body control module.

That's where you test, nowhere else.

Roy
Dec 15, 2021 at 1:58 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
It's just crazy, I'm getting no warning about liftgate being open or window... I'm guessing that wire from BCM also provides power to signal warnings as well to my dash alerts?
Dec 15, 2021 at 2:02 PM
Avatar
CONNECT HAMPTONROADS
  • MEMBER
  • 48 POSTS
I have no power sir.
Dec 15, 2021 at 2:03 PM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
No, that wire only controls voltage to the relay in the fuse block.

Did you use a new or used BCM?

Roy

Dec 15, 2021 at 2:25 PM