Question about 1991 Toyota Corolla

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Fuel indicator light won't work. Replaced the light bulb. In the electrical schematics there is a fuel switch that controls that light bulb. Where is the switch and how do I see if the switch has failed?

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It has a small curcit board that needs replace

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Where is the body control module located on 2002 cadillac deville

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.

What system (S) are you having problems with ?
Rear Integration Module (RIM)
The various RIM inputs and outputs are described in the corresponding functional areas as indicated on the RIM electrical schematics.
The RIM functions include the following:
• Automatic level control
• CIGAR relay control
• Class 2 communication requiring RIM interaction
• Content theft deterrent
• Fuel door control
• Fuel level sensor input
• Heated seat control
• HVAC blower control
• LK/CYL relay control
• Park brake relay control
• Rear defog relay control
• Rear park assist chime control
• Retained accessory power (RAP) relay control
• Reverse relay control
• Transmission shift inhibit
• Trunk release relay control
• Various controls for the interior lamps

Instrument Panel Integration Module (IPM)
The various IPM input and output circuits are described in the corresponding areas as indicated on the IPM electrical schematics.
The IPM functions include the following:
• 54 volt VF display input
• Ambient light sensor input
• Class 2 communication requiring IPM interaction
• Fog lamp switch inputs
• Front HVAC air delivery controls
• Front HVAC sensor inputs
• Front HVAC temperature controls
• Fuel door and rear compartment lid release switch input
• Hazard switch input
• HUD active control
• Instrument panel lamps dimmer switch input
• Ignition switch headlight control
• Interior lamps switch input
• Key in ignition switch input
• Traction control switch input
• Twilight sentinel delay input

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.

Jun 19, 2017 | Cadillac Cars & Trucks

1 Answer

Left rear turn signal, rear hazard lights not working

You will be needing a good electric meter.
With the key on and the turn signal activated, test the leads inside the light socket and see if electricity is getting to the bulb.
When you mentioned it flashes really fast, that says one of the bulbs is not working.
Although it could be burned out, it could also not be making contact, or the ground wire could be bad.
Since the early '80's, cars and trucks have had separate ground wires to each and every bulb and electrical component, and a bad ground will cause this problem also.
Remember, a bulb can look good and still be no good.
God bless your efforts.

Apr 19, 2016 | 2007 Ford Freestyle Limited

1 Answer

Inertia switch location

what makes you think it has one?
1st check all fuses in both boxes
then make sure CEL glows, key on, NO CEL means NO EFI power.
Check engine light = CEL (MIL, mech named)
may be the tank wire connector fell off. (2nd check)
why not let the insurance shop fixing it , find this???
or not insured?
if you are hit the other guy pays??? rear ended are 99% other guy at fault. so.....
the first test is fuel pressure (a the fuel rail)
see TJ jeep here, read the fuel schematics, its clear.
only need a fuel pressure gauge and a voltmeter to find this.

its a jeep, the first thing you need to do is see if
the ASD autoshutdown relay is closing key on, cranking..????
if that dont close, all else is just window dressing...

fuse 12 and 23 kills fuel pump and ASD kills fuel pump.
the fuel sensed level goes direct to the PCM..

now the secret ASD what is it what does it do and work.:???
1: it cuts injection if spark fails or CMP or CKP fails.
that is its #1 job,
it closes every time you crank,(click) and if spark is good in 2 seconds
it stays closed, if not it drops out. any scan tool can see why
by cranking for 5 seconds and look for good cranking RPM (250?)
and no DTCS for crank or cam sensors dead.
this ASD is really the anti crash and burn relay.. in truth.
ACBR . lol.\
on other cars the PCM does the ASD job. directly. but not jeeps.

the inerial switch is for AIR bags, SRS, not pump
the electrical circuit shows one extras switches.
best i can tell, 100s of schematics... it have to be fuel only switch
non electric, go to and look at fuel lines parts drawings
for free any time you want for such a valve.
i have one car with a anti roll over switch but is mazda. (fuel)

use the link above and online parts store to see all fuel related parts

1:fuel pressure to rail at spec? cranking !!!
2: spark , got spark
3: got injections?
4: PCM Scans dont show errors for 5 seconds cranking?

Feb 06, 2014 | 2006 Jeep Wrangler 4.0

1 Answer


My wife had a car 06 cobalt which the electric motor on power assist steering quit running, AC seemed to not put out and issues with the lights. The dealer wanted over 400 dollars to repair. She drove it home to let me try to figure it out. A couple days later the car would not crank so I replaced the battery and all the problems were gone. If the check engine light is not giving you a code to help I would suggest load test battery(a battery can have good voltage but volt drop can indicate it is going bad) and check alternator output.

Jun 03, 2017 | 2006 Ford Crown Victoria

1 Answer

98 crv won't start

Check compression and timing belt. If belt is ok and you have compression, check to see if you have a pulse at the injectors. You use a device called a NOID light (basically a light bulb that plugs into the injector plug. Unplug the injectors one by one and plug the light in then crank the engine. Light should blink on and off if the system is working properly. If not check for a bad crank sensor, blown injector fuse and wiring harness. Hope this helps.

Nov 02, 2011 | 1998 Honda CR-V

2 Answers

2004 Dodge Ram 1500 blown fuel pump fuse. 20 amp fuse keeps blowing to fuel pump. local mechanic put on scope drawing 10 amps. electrical waves look correct. followed wires from fuse panel to fuel pump,...


Jul 27, 2010 | 2004 Dodge Ram 1500

2 Answers

Low fuel light indicator

try checking for other fuses, replace them with the same ampacity. With the radio, radio and light are on the same fuse i believe the lights for the radio are bad. If fuses are okay maybe the light bulb for the low fuel indicator has blown the light bulb can be replaced.

Jul 24, 2009 | 1997 Mazda MX-5 Miata

1 Answer


fuel filter? how about power to the fuel pump,loose ground wire to chasis? wiring harness? terminals clean at point of connection?did you check the fuel pump relay? Relay is located in electrical center under the hood on the driver side.relay and fuse legend will be on bottom side of cover, you sould be able to switch with another relay that you know works, ie: switch horn relay with fuel pump relay, honk horn to insure both relays are working when either relay is inserted into horn slot. Do you by chance have the electrical schematic drawing for the fuel pump?

Feb 17, 2009 | 2000 Chevrolet Silverado

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