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Dash lights after turning engin off contiously

I tried replacing module

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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

Posted on Nov 02, 2012


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I have a 2007 cadillac cts with a no crank no start problem. The TC light is on as well as the theft protection light and the check engine light, but it will not say anything. What could be the pro?

It won't talk to you ? explain that . Is the battery an cable connections good ? Do the headlamps shine bright ? Does the theft light flash when trying to start the vehicle ? Do you know how complex your vehicle is ? The number of control module's on the vehicle , what GMLAN serial data communications are ? What happens when you turn the key to start ? The ignition switch is a low voltage input to the BCM - body control module system , the BCM turns on relays an sends messages to other modules to start the vehicle , turn thing's on etc... Why the GMLAN
The body control system consists of the following 2 modules:
The dash integration module (DIM)

The rear integration module (RIM)

Each of the 2 body control modules integrate a number of functional systems. Each module is connected to the class 2 serial data circuit, many of the control signals are implemented by class 2 messages.
Dash Integration Module (DIM)
The various dash integration module (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:
The cigar lighter relay control

The class 2 communication requiring DIM interaction

The exterior lighting control

The headlamp washer control

The hood ajar switch input w/export

The horn relay control

The interior lighting control

The load management

Serial Data Messages The modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid PMM message until they can check for the engine run flag status on the serial data circuits. If the PMM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is True, indicating that the engine is running, the modules fail-safe to RUN. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is False, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state, the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Discrete Ignition Signals Those modules that have discrete ignition signal inputs also remain in the state dictated by the last valid PMM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, battery positive voltage, the modules will fail-safe to the RUN power mode. If the discrete ignition input is not active, open, or 0 voltage, the modules will fail-safe to OFF-AWAKE. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
I'd say your best bet is take your vehicle to the dealer or some other qualified repair shop .

Sep 22, 2016 | 2007 Cadillac CTS

1 Answer

I have narrowed my problem of no working lights on my 97 Hyundai 2 door hatchback to the switch that turns on the lights after the engine is started. Everything else works, tail lights running lights, even...

No, I wouldn't suspect the headlight switch. Something more sinister, more surreal, too: a module, maybe a body control module, or a light control module, probably under the dash somewhere. GM began using a lighting control module (LCM) at least as far back as 1992, tucked unhandily up under the dash, and wired between the headlight switch and everything else in the lighting circuits.
Normal to suspect the headlight switch, but the odd conjunction of the car running and the headlights' actions suggest a module (another computer!) may be in there. The headlight switch should have no effect on it if the engine was running or not. You would have to see a wiring diagram in a repair manual to check. I am not familiar with your Hyundai, but if you could find a diagram, you should be able to fix it.
If you register for free at, giving make, model, year and engine size of vehicle, you can access wiring diagrams and repair procedures. Just look under repair guides.
Wiring diagrams were under Chassis Electrical, if I recall.

Aug 13, 2013 | 1997 Hyundai Accent

2 Answers

Turn signal and flashers stop working

Check fuse # 12 and 14 at the power distribution center (fuse box) in the engine compartment near the battery. If both fuses test good, the the more likely cause of your problem is either the turn signal / hazard switch or the Combination Flasher / Daytime Running Light module. This module is located on the junction block, behind the left side of the dash.

The switch can be tested by accessing the wires at the base of the steering column.
Left turn signal = Light Blue / White
Right turn signal = Light Blue / Yellow
Hazard flasher = Dark Blue / Pink

These wire should show ground when the switch is actuated in its respective positions. If ground is not present when the switch is actuated, check also the black wire at the switch. This wire should show ground at all times. If you do not get ground on this wire than there is an open in this wire. Repair or re-grounding this wire should solve your problem. If the switch test good than the Combo Flasher / DRL module will need to be replaced.

Nov 05, 2010 | 2000 Dodge Caravan

2 Answers

I have a 93 caddy deville and cannot find a site to tell me what the codes mean

this site has alot of info:

Hope this is what you need!!!

ABS (Antilock Brake System)
AMP (Amplifier)
DDM (Door Driver Module)
DIM (Dash Integration Module)
IPC (Instrument Panel Cluster)
IPM (Instrument Panel Module)
IRC (Integrated Radio Module)
PCM (Powertrain Control Module)
RFA (Remote Function Actuation)
RIM (Rear Integration Module)
SDM (Sensing and Diagnostic Module) Includes airbag crash data. Under RF seat
VTD (Vehicle Theft Deterrent)
MSM (Memory Seat Module)
TTM (Tilt/Telescoping Module)
RSS (Road Sensing Suspension)

How To Pull Codes To check for Diagnostic Trouble Codes stored in the computer, turn the ignition on, then hold down the OFF and WARMER (for digital dash) or OFF and passenger-WARMER buttons (for analog dash) or OFF and "Info ^" buttons (if you have temperature dials) until all of the dash lights come on. The digital display will then show any codes stored. Be prepared to write them down. When it's done, you will probably see "PCM?" At that point, press the OFF button 3 or 4 times until the dash goes back to normal, or just turn off the ignition.

Oct 09, 2009 | 1993 Cadillac DeVille

1 Answer

1992 Jeep Wrangler 2.5L engine maintenance light needs resetting

It's a module under dash programmed to turn on Maintenance light. You can pay $80 to replace module or pull wire going to module and save $80. BTW, it's there to tell you to replace your Oxygen sensor.

Apr 09, 2009 | 1992 Jeep Wrangler

1 Answer

My Kia sportage cannot start contiously

what do you mean cannot start contiously? like you try once and you hear a grinding then you turn the key to the off position and try again and i starts???

have your starter clynone checked

Jan 09, 2009 | 1996 Kia Sportage

1 Answer

We replaced the battery and now the engine turns over but wont start and none of the lights on the dash dont show up

fuse 12 under the dash is blown replace fuse
if still no start

i had the same problem the cause was one wire on the wire harness that connectes to the passive anti theif module (the module is around the ignition switch)(the wire harness runs down the steering column 10 inches long 4 wires in the harness)i repaired the wire on mine took 2 hours so far starting fine

Aug 05, 2008 | 1998 Lincoln Town Car

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