1998 Cadillac Deville dashbord

Tiny
MIL USOS
  • MEMBER
  • 1998 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 107,500 MILES
The digital dash on my 98 cadillac deville is showing low voltage (about 10v) but if I check at the battery it shows normal voltage. When I drive all the red lights on the dash will come on for a couple of seconds like when you first turn the car on, the dash will blank out, the heater will come on at 75*, and the windows wont work. I saw somewhere that there is a dashboard cts that controls the dash voltage but dont know if thats the problen or where its at. PLEASE HELP.
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Tuesday, December 15th, 2009 AT 10:07 AM

3 Replies

Tiny
KHLOW2008
  • EXPERT
Hi mil usos,

Thank you for the donation.

Here are the procedures for retrieving trouble codes. Check if any trouble codes are present.

RETRIEVING & CLEARING DTCS

NOTE: Diagnostic Trouble Codes (DTCs) for other systems can also be retrieved during this procedure. Only information related to IPC diagnosis is covered in this article.

Retrieving DTCs

1. Turn ignition switch to ON position. On analog IPC, press OFF and passenger warmer (up arrow) buttons on Climate Control Panel (CCP) until all segments of display are illuminated. On digital IPC, press OFF and warmer (Red bar) buttons on Climate Control Center (CCC) until all segments of display are illuminated.

2. On all models, Driver Information Center (DIC) will display all set DTCs (current or history). DTCs will be displayed in the following order: PCM, IPC, ACM, SDM, TCS, RSS, PZM, IRC, RFA, CCP, MSM, MMM and PHN. Pressing FAN DOWN button will by-pass DTC display.

Clearing Codes.

IPC CLEAR CODES option can be used to clear stored IPC DTCs. When selected, IPC CLEAR CODES option immediately erases all DTCs stored to that point and DIC displays IPC CODES CLEAR. Once a malfunction has been corrected, clear DTCs so future service is not duplicated. After DTC has been cleared, it is necessary to verify proper system operation. To ensure system is operating properly, duplicate conditions under which DTC was originally set and recheck for codes.

ABBREVIATIONS & DEFINITIONS
AbbreviationDefinition
ACM - Air Control Module
CCC (1) - Climate Control Center
CCP (2) - Climate Control Panel
IPC - Instrument Panel Cluster
IRC - Integrated Radio Chassis
MMM - Memory Mirror Module
MSM (3) - Memory Seat Module
PCM - Powertrain Control Module
PZM (4) - Platform Zone Module
RFA - Remote Function Actuator
RSS (3) - Road Sensing Suspension
SDM - Sensing & Diagnostic Module
TCS - Traction Control System
PHN (3) - Telephone

(1) Digital instrument panel.
(2) Analog instrument panel.
(3) Vehicle may not be equipped with these options.
(4) Platform Zone Module (PZM) may also be referred to as Body Control Module.
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Wednesday, December 16th, 2009 AT 10:44 AM
Tiny
FACTORYJACK
  • EXPERT
Sounds like you have a battery, or charging system issue. You say the battery has normal voltage, what is the normal voltage? What is the voltage at the battery with the engine running and loads on?
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Wednesday, December 16th, 2009 AT 9:34 PM
Tiny
PJUSINO
  • MEMBER
What did you find on this as I am having the same issue.
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Tuesday, August 17th, 2010 AT 8:41 PM

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