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Lift gate and rear window not opening

Tiny
CONNECT HAMPTONROADS
  • MEMBER
  • 2011 CADILLAC ESCALADE ESV
  • 130,000 MILES
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.
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Tuesday, December 7th, 2021 AT 6:24 AM

45 Replies

Tiny
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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
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Tuesday, December 7th, 2021 AT 6:53 AM
Tiny
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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.
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Tuesday, December 7th, 2021 AT 7:19 AM
Tiny
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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
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Tuesday, December 7th, 2021 AT 7:25 AM
Tiny
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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?
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Tuesday, December 7th, 2021 AT 8:13 AM
Tiny
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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
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Tuesday, December 7th, 2021 AT 8:41 AM
Tiny
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Ah, thank you. Looking now.
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Tuesday, December 7th, 2021 AT 9:03 AM
Tiny
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Keep me updated.

Roy
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Tuesday, December 7th, 2021 AT 9:22 AM
Tiny
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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.
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Tuesday, December 7th, 2021 AT 9:56 AM
Tiny
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Brown port looks like it has dark green, but more wiring.
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Tuesday, December 7th, 2021 AT 10:16 AM
Tiny
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Both of the green on the rose port have a black stripe.
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Tuesday, December 7th, 2021 AT 11:27 AM
Tiny
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Sorry, there is one that is green with black stripe, it's reading 12v.
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Tuesday, December 7th, 2021 AT 11:42 AM
Tiny
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No stripe. The color is dark green.

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

Roy
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Tuesday, December 7th, 2021 AT 1:59 PM
Tiny
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I attached the connector diagram for you. I circled the wires that need power for the relay to work.

Roy
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Tuesday, December 7th, 2021 AT 2:29 PM
Tiny
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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?
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Tuesday, December 7th, 2021 AT 2:47 PM
Tiny
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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.
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Tuesday, December 7th, 2021 AT 2:53 PM
Tiny
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Ok sir, no voltage at wire car on or off.
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Thursday, December 9th, 2021 AT 10:33 AM
Tiny
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I opened up BCM to see if anything is burnt, just to get a visual. Just let me know where to go from here.
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Thursday, December 9th, 2021 AT 11:07 AM
Tiny
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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
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Thursday, December 9th, 2021 AT 1:01 PM
Tiny
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Thank you, sir. Just ordered it.
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Thursday, December 9th, 2021 AT 1:25 PM
Tiny
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You are welcome.

Always glad to help.

Let me know if you have any other questions.

Roy
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Thursday, December 9th, 2021 AT 1:35 PM

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