2003 Cadillac CTS TRUNK

Tiny
CARLOS17
  • MEMBER
  • 2003 CADILLAC CTS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
My trunk would not open, after checking fuses, relay, and rear integreaded module they all work, my question is, if the relay is closing and opening when operating with remote control or release button on the door where does the signal go from relay, direct to trunk latch or that it hit something else before getting there, trying to figure out if I got a broken wire some where or some other part gone bad, thanks for your time
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Monday, January 11th, 2010 AT 6:32 PM

8 Replies

Tiny
FACTORYJACK
  • EXPERT
You can check for a signal at the release solenoid with a test light. If the relay is sending, it is power on tan/white pin A, and it is grounded on pin B(g402). It is direct from the relay to the actuator.
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Tuesday, January 12th, 2010 AT 1:57 AM
Tiny
CARLOS17
  • MEMBER
I do not have voltage
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Tuesday, January 12th, 2010 AT 7:42 AM
Tiny
CARLOS17
  • MEMBER
Is the relay sending signal to latch or actuator?
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Tuesday, January 12th, 2010 AT 7:48 AM
Tiny
FACTORYJACK
  • EXPERT
In this case, the latch and actuator are the same. Like I say, from the relay, power goes to Pin A of the latch(actuator) on a tan/white wire, Pin B is a black wire that grounds. You can check it by bridging Pins A and B with a test light. If you have no light, substitute pin B with a good chassis ground. If you still have no light, then it is almost certain you have no power. Often times, there are other relays in the same panel that are the same. Try swapping it with another relay in the panel, and see if it works.
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Tuesday, January 12th, 2010 AT 8:29 AM
Tiny
CARLOS17
  • MEMBER
Yes actualy there are three relay all the same and I swapthem already but nothing I can here the same relay opening and closing like before
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Tuesday, January 12th, 2010 AT 9:05 AM
Tiny
FACTORYJACK
  • EXPERT
You could have an issue with the fuse block, or an open circuit 56 which is the tan/white wire that is direct from relay to actuator Pin A. The schematic is calling it r33 at the relay, I don't know how they are labeled, or if the are. With the actuator disconnected, and the relay out, you can measure resistance of that circuit by probing Pin A at actuator, and probing the relay terminals. If you don't have continuity on any, it may be open. Or you can go to the back of the fuse block, and determine which is the correct terminal. The control side, and the switch side of the relay share the same power feed which is jointly connected within the fuse block. Check with a test light that there is two powers at the relay pins r31 and r32. If there is not two powers, you could have an issue with the fuse block.
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Tuesday, January 12th, 2010 AT 10:48 AM
Tiny
CARLOS17
  • MEMBER
Thanks I'm going to do that, check resistance from pin A at the actuator and pin 33 ay the relay, thanks for your help!
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Tuesday, January 12th, 2010 AT 11:16 AM
Tiny
CARLOS17
  • MEMBER
Just want to tell you guys thanks for your help found a broken wire#56 under trunk liner thanks again
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Tuesday, January 12th, 2010 AT 3:27 PM

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