Question about 2003 Cadillac Deville

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Same car problem not starting 2003 cadillac deville, will not turn over,cannot locate fuse box under steering wheel, fuse boxes under hood and rear seat but there is no fuse cfm or ecu now what?

Lights inside work, heater works, no radio, no power windows, head light does not go dim when trying to start, battery light and service engine light come on and stay on

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  • sam esposito
    sam esposito Mar 20, 2014

    Still awaiting reply on this matter.

  • ifawnmeade Mar 20, 2014

    Yes, can you read the codes?



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Cadillac codes are easy to read..then replace the bad sensors etc and then clear the codes and try again etc

Posted on Mar 20, 2014


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I have a 2002 Buick Rendezvous and the radio and heater control backlights have shut off simultaneously and now only the vent control and trunk release lights work.

I would take a look see at the ground circuits for the none working lights . The incandescent back lighting lamps are then grounded at G200, G301 and G302. You would need factory service info for the location of the grounds .Like this from buick
Right side of the I/P, secured on the underside of the cross car beam, behind the I/P compartment . The I/P compartment is the glove box ,don't know why they just don't say that . You could also check out the power and ground from the componet that's not working ! You can find factory like service info. from alldata . Check out some videos on youtube

Interior Lamps Dimming
The second group includes lamps which may be dimmed. This group may use a combination of vacuum fluorescent (VF) illumination and of incandescent lamps.
• The door switches and the window switches
• The HVAC control head assembly
• The radio
• The instrument panel cluster (IPC)
• The steering wheel controls
• The heated seat switch
• The HUD switch
• The lift glass window release switch and traction control switch
When the ignition switch is turned to the ON position, the vacuum fluorescent (VF) displays (radio and HVAC control assembly), incandescent lamps, turn on at maximum brightness. When the park lamps are on and the ambient light sensor indicates low light conditions, all incandescent back lighting turn on at the dimming level indicated by the IP dimmer switch. At the same time all vacuum fluorescent (VF) displays dim to match the indicated dimming level. The BCM L fuse in the console fuse block, supplies battery positive voltage to the BCM. The I/P courtesy lamps supply voltage circuit of the BCM, supplies battery positive voltage to all the dimmable lamps. When the headlamp switch is placed in the PARK position, the BCM will then dim the interior lamps to the dimming level indicated by the IP dimmer switch. When the driver selects a dimming setting by moving, the IP dimming switch potentiometer, all incandescent back lighting lamps are provided with a specific voltage. The incandescent back lighting lamps are then grounded at G200, G301 and G302. When the IP dimmer switch is moved from MIN to MAX, all vacuum fluorescent (VF) displays, as well as all incandescent back lighting respond from Minimum intensity to maximum brightness in response to the IP dimmer switch.
The driver may select parade mode by manually turning on the park lamps during daylight conditions. The front park lamp circuit supplies voltage to the instrument panel cluster, radio and HVAC assembly for a park lamp on input, and the displays will become full bright.

Dec 03, 2016 | 2002 Buick Rendezvous

2 Answers

2003 wont start

Starter relay, starter connections, or bad starter.

Mar 19, 2014 | 2003 Cadillac Deville

1 Answer

Front windows not working, dimming dash lights

Engine start and run perfect????
head lights all good and bright. with heater fan on?????
front side? windows only? electric window motors all dead or weak?
checked all fuses yet?? THAT BE FIRST!
you have a dead or weak battery.
batter cable lugs all corroded and green?
fuse box damage at engine bay box? check carefully.
for sure its lost DC 12v power, so
its only a matter of measuring it from dash to battery, and finding it.
12.6v at battery rested.
12.6v at all wire on the main engine bay fuse box. or a fuse is blown
or wires to it damaged.
then 12.6v at the cigarette light , key on.
if not find the reason easy with any volt meter.
if battery is good, then you have corrosive resistance in the wire feeds
somewhere. most cars, i can see it before , measure it. just by careful inspections. if not , out comes my $10 walfart meter.
Mines rearlly a Fluke meter, but thats not important.

Feb 11, 2014 | 2002 Toyota Sequoia

1 Answer

My 2008 SRS won't start and the trunk won't open. It was fine when I drove it all yesterday. I did get gas and put the 3rd row down. The radio works so I don't think it's the battery, but maybe. Any...

Turn your head lights on and try starting it if your lights dim way down or go out. try jump starting it. Your trunk release takes more power than your radio to work.

Nov 08, 2013 | Cars & Trucks

3 Answers

When trying to start it makes a clicking noice. The battery works since radio & lights come on.

The battery can be charged/working enough to turn on a radio or lights, but can also be insufficient for starting a vehicle at the same time; one is powering electronic while the other requires actual mechanical movement of the starter (much more labor intensive). The battery might still be the problem.

Have you tried checking the starter as well?

Feb 02, 2011 | 1998 Ford Econoline

1 Answer

Rear-window defogger wont work and radio cuts off when u put on

Sounds like a dead short. Disconnect the power to the radio and try the rear defog. Then to determine if it is the radio or the hater, disconnect the heater and put power to the radio. Another simple test is to, at night have the head lights on, turn the radio on see how much the lights dim. Then with the radio off, turn the rear defog on. Then try both. IF either one makes the head lights dim and not recover after a minute or so that devise is the shorted component. Check grounds on the radio and the heater.

Nov 30, 2009 | 2003 Pontiac Grand Prix

1 Answer


with headlights on, try cranling the engine. I they dim the batt is no good, If they go out, you have a battery connection problem/loose or poor contact on groung(neg) cable. If nothing happens your starter relay is kaput.. Good luck

Jun 14, 2009 | 1995 Lincoln Town Car

1 Answer

Head light-Drivers side

Well it was the weird electrical situation but I got it fixed. For my premium service please email back and I will give you what fixed this non common problem.

Jan 26, 2009 | 2001 Dodge Caravan

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