1999 Cadillac DeVille - Page 4 - Answered Questions & Fixed issues

You should not need to pump the throttle. That does not have any effect on starting the engine on a fuel injected car. How do you un-stick the throttle ?

Most likely a cracked heater core. Check your anti-freeze see if it is low. Check passenger side for wet mat. Both signs of a heater core problem.

The problem may be a bad alternator. When the battery is completely dead jump starting the car will charge the battery enough to run the car for short periods. Take the alternator to the auto parts store and have it tested (usually for free).

TDM ? explain what you think this is ? If you are referring to a module here is a list of the ones on your caddy. The control modules on the class 2 data line can include the following modules: ?€¢ The body control module (PZM)

?€¢ The cellular telephone module (PHN)

?€¢ The climate control panel (CCP)

?€¢ The continuously variable road sensing suspension (CVRSS) module (RSS) (w/F45)

?€¢ The electronic brake and traction control module (EBTCM) (ABS)

?€¢ The heater and A/C programmer (HCM)

?€¢ The inflatable restraint sensing and diagnostic module (SDM)

?€¢ The instrument cluster (IPC)

?€¢ The memory mirror module (MMM) (w/A45)

?€¢ The memory seat module (MSM) (w/A45)

?€¢ The powertrain control module (PCM)

?€¢ The radio (IRC)

?€¢ The radio interface module (RIM) (w/UQ4)

?€¢ The remote function actuator (RFA) module

I do believe you have individual fuses for the light assembly on your car. I know newer ones do. You might want to check them first. You have a panel under the hood and one under the back seat. Both will be marked under the cover.

Your owners manual should have all the information you need

A few things could be wrong....it could be your brake control module, anti-lock brake system or a wheel speed sensor. The best thing to do is to get it into a garage and have them take a look at it and give you an idea of what is wrong. Either way, if you do not have the proper tools, you are better off taking it to the shop.

I hope this helps.

you cant its a one piece unit

You will have to get the codes checked.This will tell you what could be causing the problem.Sounds like ignition problem.But without codes it hard telling exactly the problem.As far as the morning starts you might have to clean the throttle body.When you get the codes post back and I can help explain the code or codes and what you should do.Auto Zone will check them for free.Hope this helps.Good luck.

Examine the left dash panel to find the headlight switch. This is the control you use to turn the headlights on or off, with the exception of the daytime-running lights.

Look directly beneath the headlight switch. You'll see a small lever. This is called the "Twilight Sentinel." Move the lever all the way to the left to the "Off" position.

Turn the headlight switch to the "Parking Lights" mode. This icon has a symbol of two small bulbs. The daytime-running lights are now turned off.

Repair manual, your library may have. Sometimes Google images will have diagrams, or photos. DIYer? you may need a repair manual in the future anyway. Your favorite auto parts store should have. (easy to refer to) also.

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.

Do you have a sunroof or moonroof? If so the problem is going to be in the drain for that sunroof or moonroof. If you open the roof, on either front corner you will see a small circular hole. Take some compressed air and blow it through each of those holes. You may see debris come out of the bottom near the back of your wheel well. Take cup of water and slowly pour that near those holes and make sure it goes through. Usually when that drain is clogged the water from a rain storm will flood into the passenger cabin.

Air Mix Actuator Replacement - Driver Removal Procedure

1. Remove the right sound insulator. Refer to Instrument Panel Insulator Panel Replacement - Right Side in Instrument Panel, Gauges and Console.
2. Remove the instrument panel compartment. Refer to Instrument Panel Storage Compartment Replacement in Instrument Panel, Gauges and Console.
3. Unsnap the rod from the plastic retainer on the actuator arm.
4. Remove the two screws from the actuator (2).
5. Disconnect the electrical connector (1).
6. Remove the actuator (2).
7. Inspect the air mix door for free travel.

OBDII Code U1255 CADILLAC Lost Communications HelpForCars net P1610 Cadillac how to repair DTC B1348 Very Low A/C Refrigerant Pressure DTC U1255 Serial Data Line Malfunction The class 2 serial data line communicates information between the modules. Each module connected to the serial data line is assigned a recognition code, or address. This code is used in order to identify which modules are communicating. Modules communicate with each other by periodically sending state of health (SOH) messages. When the ignition switch is in RUN, each module that is communicating on the serial data line sends an SOH message every 2 seconds. This ensures that the system is operating properly. At key on, most modules must learns the initiation data from other modules on the serial data line. When a module requests initialization data from another module, and that request is not acknowledged after 5 seconds, the module stores class 2 initialization error DTC U1255. Conditions for Setting the DTC ?€¢ The module does not receive required initialization data on the class 2 serial data line. The module retries the request for 5 seconds, and then sets DTC U1255.

?€¢ This DTC only sets if DTC U1300 or U1301 are not current

Attempt to establish communication with all of the modules using a scan tool. Does the scan tool communicate with all of the modules? -- Go to Step 3 Go to the appropriate diagnostic system check for the module that is not communicating

That is a three element lamp bulb. Brakes, turn, and tail lights are all in the same bulb. Replace the bulb and all should be OK.

Likely a computer problem, very unlikely a "short."

This is a GM CAR.... The Circuit Board on the Wiper Motor is BAD... Replace the Circuit Board and your Problems will be gone

WHICH DRAIN PLUG. RADIATOR OR EXPANSION TANK

Are the battery calbels clean and free of corrosion?