Question about Cadillac DeVille

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I have a 2002 Deville DTS which at first lost the turn signals, tachometer and speedometer. Now every other electrical component(ie feul, lights, power Windows, doors, as well as locks) all fail to wo

I have a 2002 Deville DTS which at first lost the turn signals, tachometer and speedometer. Now every other electrical component(ie feul, lights, power Windows, doors, as well as locks) all fail to work. The car turned over and everything worked for a second, then stopped again. Now the battery is drained, and won't hold charge. I'm at my wits end on this.

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  • Cadillac Master
  • 15,575 Answers

Do you know how to do automotive electrical testing ? Checking power and grounds . Hooking up a scan tool that can communicate with all the modules on the vehicle . The insturment cluster is a module too ,has a microprocessor inside . All the modules on the vehicle are connected through a serial data network . Class 2 . All it takes is one messed up module to short out the network an the vehicle will have all kind of electrical problems , like you won't believe . I see this all the time and the odds of you fixing this is probably not good . You have no idea of the complexity of these systems . So before you make the problem worst have the cadillac dealer check it out .
Body Control System Description and Operation
Table 1: 4-Wire Ignition Switch Table
The body control system consists of the following 3 modules:
• The Dash Integration Module (DIM)
• The Instrument Panel Module (IPM)
• The Rear Integration Module (RIM)
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each module is connected to the Class 2 serial data circuit, many of the control functions are implemented by Class 2 messages.

Dash Integration Module (DIM)
The various DIM input and output circuits are described in the corresponding functional areas as indicated on the DIM electrical schematics.
The DIM functions include the following:
• Class 2 communication requiring DIM interaction.
• Control of exterior lamps.
• Control of front fog lights.
• Control of the headlights.
• Headlamps on with wiper input.
• Hood ajar switch input w/export.
• Horn relay control.
• Interior lamps incandescent dimming.
• Low side temperature for HVAC compressor.
• Power moding control over Class 2 serial data circuit.
• Reverse lockout solenoid control.
• Steering wheel controls input.
• Storage of the clock settings and, sending a message out on the class 2 serial data circuit in response to requests from other modules.
Serial Data Power Mode
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the DIM. The PMM receives 4 signals from the ignition switch.
To determine the correct power mode the PMM uses the following circuits:
• Accessory voltage
• Ignition 1 voltage
• Ignition 3 voltage
• Off/Run/Crank voltage

Posted on Aug 13, 2017

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6 Suggested Answers

6ya6ya

6ya staff

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SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 59 Answers

SOURCE: electrical problem

Turn off the car and pull out the key.
Check the alternator leads and the battery leads if they don't touch any other leads around them.(or each other-short circuit-as for the alternator)
Is the battery charged? It might have even died, partially, thus providing enough power only to the small consumers. In that case the engine wouldn't start- does yours?
Check the fuses, but this might be a serious problem, so replacing the fuses can't be considered a long time solution itself...(if they were burnt)
Can you fire up the engine? 
Do the Gauges work right? And the dashboard lights(except those you already mentioned)?

However if you are not really familiar with all this, I'd suggest you to have it done by a car electrician, he could have it finished by tomorrow evening...

answer the questions for further info if you are unsure

and rate please

Posted on Apr 16, 2009

pippall

Philip Long

  • 1486 Answers

SOURCE: 2000 Buick Lesabre. I parked the car about 6

The immobilizer has come on you need to diss arm it or bypass it.This some times happens when the battery is left flat for long periods of time.

Posted on Jun 05, 2009

Robert Debison

  • 412 Answers

SOURCE: 2002 jeep power windows and door locks stopped

SOUNDS LIKE YOU HAVE BROKEN WIRES BETWEEN DRIVER'S DOOR AND BODY AT A PILLAR..PULL RUBBER BOOT FROM BODY AND DOOR AND INSPECT WIRING HERE

Posted on Jun 21, 2009

jmgldsmth

Jim Goldsmith

  • 2005 Answers

SOURCE: 2000 Ford Taurus Battery Drain - - After the car

using a test light with all doors closed everything in the car off; disconnect your black battery cable then: connect a test light between the battery post you just removed the cable from and the cable you removed; the light should light. this is your short (leak) then remove fuses until you find the fuse that causes the light to go off your problem is in that circuit.

Posted on Nov 20, 2009

Anonymous

  • 1 Answer

SOURCE: 2002 Explorer V6. Power door locks have stopped working.

Mine just started doing the exact same thing tonight. I disconnected the battery to change a DPFE sensor and when I reconnected I had this problem. I also have auto headlamps and they are not working either. I don't know what is wrong, I checked all the fuses also and everything looks good. I wonder if it is a relay??? I will make sure I respond to you if I find a solution.

Posted on May 06, 2010

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