Which fuse controls I/P illumination?

Principles of Operation
The instrument cluster and panel illumination consists of dimmable and non-dimmable illumination components. The dimmable illumination is controlled by the instrument panel dimmer switch, which allows the brightness level of the backlights to be adjusted to the customer preferences. With the parking lamps ON, the instrument panel dimmer switch uses electronic circuitry to provide a variable pulse width modulated (PWM) output to the instrument panel and all applicable switches depending on the driver-controlled level of intensity. The headlamp switch backlighting consists of 2 constantly illuminated LED bulbs that are powered by separate circuits. Battery voltage is supplied to the first bulb when the ignition switch is in the RUN position. Battery voltage is supplied to the second bulb with the parking lamps ON. The non-dimmable illumination allows for full intensity dependant on the ignition switch position.

Inspection and Verification

1. Verify the customer concern.

1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart Mechanical Electrical

• Headlamp switch
• Instrument panel dimmer switch

• Circuitry
• Connector(s)
• Headlamp switch
• Instrument panel dimmer switch
• Illumination source(s)

1. If an obvious cause for an observed or reported concern is found, correct he cause (if possible) before proceeding to the next step.

1. If the cause is not visually evident, verify the symptom and GO to Symptom Chart .

Symptom Chart
Symptom Chart Condition Possible Sources Action

• The control illumination is inoperative

• Headlamp switch
• Circuitry

• Go To Pinpoint Test A .

• The instrument cluster illumination is inoperative

• Circuitry
• Instrument cluster

• Go To Pinpoint Test B .

• The climate control panel illumination is inoperative

• Circuitry
• Climate control panel

• Go To Pinpoint Test C .

• The audio unit illumination is inoperative

• Circuitry
• Audio unit

• Go To Pinpoint Test D .

• The transmission control lever illumination is inoperative

• Circuitry
• Transmission control lever illumination bulb

• Go To Pinpoint Test E .

• The hazard warning switch illumination is inoperative

• Circuitry
• Hazard warning switch

• Go To Pinpoint Test F .

• The traction control switch illumination is inoperative

• Circuitry
• Traction control switch

• Go To Pinpoint Test G .

• The window control switch illumination is inoperative

• Circuitry
• Window control switch

• VERIFY the operation of the window control switch in question. If the window control switch is inoperative, REFER to Section 501-11 . If the window control switch operates correctly, INSTALL the new window control switch in question. REFER to Section 501-11 .

• The instrument panel illumination does not dim

• Headlamp switch
• Circuitry

• Go To Pinpoint Test H .

Pinpoint Test B: The Instrument Cluster Illumination Is Inoperative
Normal Operation A variable pulse width modulated (PWM) voltage is supplied to the instrument cluster through circuit 29S-LA31 (OG/BU). The instrument cluster is grounded through circuit 91-GG14 (BK/OG).

Possible Causes
• circuit 29S-LA31 (OG/BU) open
• circuit 91-GG14 (BK/OG) open
• instrument cluster

PINPOINT TEST B: THE INSTRUMENT CLUSTER ILLUMINATION IS INOPERATIVE CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

Are these the lights you are talking about ?
Instrument Cluster and Panel Illumination The instrument cluster and panel illumination is used to provide backlighting to the instrument panel, switches, and control components when the headlamp switch is in either the PARKING LAMPS ON or HEADLAMPS ON position. The level of intensity is adjustable by rotating the instrument panel dimmer switch either up to increase intensity or down to decrease intensity.
Fixed Backlighting When the accessory delay relay is energized, switched voltage is supplied to the non-dimmable components and switches.
Dimmable Backlighting When the parking lamps or the headlamps are in the ON position the smart junction box (SJB) monitors the input from the instrument panel dimmer switch. The SJB sends a pulse-width modulated (PWM) voltage to the dimmable components and switches based on input received from the instrument panel dimmer switch. The SJB also sends a message over the controller area network (CAN) to the audio unit, and the instrument cluster to indicate the backlighting intensity level.
If you don't know about PWM an smart junction box your better off taking your vehicle to a quailified repair shop ! You don't the diagnostic tools or technical information . May have DTC'S - diagnostic trouble codes stored in the SJB (computer ). Do you know where SJB is located ?
Visual Inspection Chart Electrical

• Smart junction box (SJB) fuse 23 (15A)
• Bulb(s)
• Circuitry
• Connectors
• Illumination source(s)
• Auxiliary climate control switches (if equipped)
• Door lock control switches
• Window control switches
• Headlamp switch
• Dual electronic automatic temperature control (DEATC) module
• Audio unit
• SJB
• Instrument cluster

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

1. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:

• check that the program card is correctly installed.
• check the connections to the vehicle.
• check the ignition switch position.

1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.

1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:

• CAN circuits fault; all electronic control units no response/not equipped, refer to Section 418-00 .
• No response/not equipped for SJB, refer to Section 419-10 .
• System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the SJB.

1. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index.

1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
2. • The control illumination is inoperative
   • Fuse
   • Smart junction box (SJB)
   • Go To Pinpoint Test A .
   • The instrument cluster illumination is inoperative
   • Instrument cluster
   • CHECK the audio unit illumination for correct operation.
     • If the audio unit illumination operates correctly, INSTALL a new instrument cluster. REFER to Section 413-01 . TEST the system for normal operation.
     • If the audio unit illumination does not operate correctly, REFER to Section 418-00 to continue diagnosis of the communications network.
   • The audio unit illumination is inoperative
   • Audio unit
   • CHECK the instrument cluster illumination for correct operation.
     • If the instrument cluster illumination operates correctly, REMOVE the audio unit. REFER to Section 415-01 . SEND it to an authorized repair facility. TEST the system for normal operation after the repair.
     • If the instrument cluster illumination does not operate correctly, REFER to Section 418-00 to continue diagnosis of the communications network.

According to the wiring diagram, you should have two 15amp fuses powering the headlight switch. One wire is red and the other is red white.
Power out of the switch is pink blue for the tail lights, and red with green, blue, black, and yellow for each headlight circuit.

Diagram courtesy of autozone.com

The fuse panel is located underneath the dash, to the left of the steering column, next to the emergency brake pedal. You need to remove the under-dash insulation to access some parts of the fuse panel.


If it doesn't have a diagram inside the box, here's one I found online: http://www.coolcats.net/tech/reference/images/fusepanel.jpg


1 15A Lt. Blue Stop Lamps, Hazard Warning Lamps, Speed Control, Cornering Lamp Relays 2 6A - CB - Windshield Wiper/Washer Pump 3

Spare - Not Used 4 15A Lt. Blue Taillamps, Parking Lamps, Side Marker Lamps, Instrument Cluster Illumination, License Lamps, A/C and Heater Illumination, Radio Illumination, Digital Clock Illumination, Autolamp Relay 5 15A Lt. Blue Turn Signal Lamps, Electronic Day/Night Mirror, Lighted Vanity Mirrors *, Backup Lamps, Illuminated Entry, Keyless Entry, Cornering Lamps 6 20A Yellow Rear Defrost Timer, Chime, Back-Up Lamps, Cornering Lamps, Rear Reading Lamps, Trunklid Release, Digital Clock Display, Illuminated Entry, Anti-Theft Module, Turbo Buzzer 7 15A Lt. Blue Fog Lamps (Turbo Only) 8 15A Lt. Blue Courtesy Lamps, Key Warning Buzzer, Illuminated Entry Module, Glove Box Lamp, Door Lock Relays, Radio Memory, Cluster Memory, Outside Mirrors, Tripminder Module, Analog Clock, Anti-Theft Relay 9 30A Lt. Green A/C Heater Blower Motor 10 20A - CB - Horn, Cigar Lighter, Fuel Filler Door, Flash-to-Pass, Speed Control 11 20A Yellow Radio, Tape Player, Premium Sound Amp, Power Antenna, Graphic Equalizer 12 20A - CB - Power Seats, Power Locks, Keyless Entry 13 5A Tan Instrument Cluster Illumination, Radio, Climate Control 14 20A - CB - Power Windows, Power Moonroof 15 10A Red Taillamps, Rear Side Markers, License Lamps, Electoluminescent Coach Lamps 16 4A Yellow Electronic ATC 17 15A Lt. Blue Electronic Cluster, Tripminder Display, Fuel Gauge (non-electronic cluster), A/C Clutch, Speed Control Module, Graphic Warning Display Module, Electronic Blower Speed Controller 18 10A Red Warning Indicator Lamps, Autolamp System, Throttle Position Sensor, Low Fuel Module, Dual Timer Chime, Tachometer, Washer Fluid Level Indicator

I have the exact same lights out. Anyone have experience in replacing them?

First check acc or inside illumination fuse in fuse block for blown fuse.

Check that your tailights/parking lights are working (not the headlights) as this fuse and relay feeds all the instument lights too.... Fuse 15amp TAIL & Tailight Relay

If not then check:
The rheostat (also known as the dimmer switch) may be faulty
as it controls all the illumination of all the backlight bulbs and other dimable switches/indicators.

In general bulbs all together draw a fair amount of current so it is possible that the wiring or ground at the major supply junction feeders has failed but that is a less common problem.

So check the rheostat dimmer wiring area first as all illumination power goes through it.

There is further simple testing we can do with the three wires at the rheostat you can check the entire illumination system.
If you jumper the white/blk to the white/blk all the illumination lights should come on (that means the rheostat is bad).

Or use a voltmeter and measure the green rehostat wire to ground it should be 12volts (if not time to check the fuse, relay and wiring)

If not then finally declare the instrument panel faulty (like burned up circuit board trace).

Note of interest: the rheostat also controls (dims) other switches not associated with the instrument cluster such as the cigarette lighter bulb and hazard switch and radio player and A/C control switch. So if those are dimming but not the instrument panel backlights then yes the instrument cluster needs fixing or a very close wiring inspection.

if you have aftermarket lights hooked up to the dash light it has been known to smoke the rheostat that controls the dimmer. I would also check the other fuses, sometimes the cluster refers to the guages themselves and not the lights that illuminate them

1996 is all I have. Look on back of cover for fuse chart.

Location
The fuse junction panel is located to the left of the steering column. To expose the fuse junction panel, remove the fuse panel cover (14A003) as outlined.


Fuse Loc. Number Fuse Amp Rating Fuse Color Circuit Protected 1 — — Not Used 2 5A Tan Instrument Illumination 3 10A Red Left Low Beam Headlamp 4 10A Red Right Low Beam Headlamp 5 5A Tan Brake/Shift Interlock Rear Window Defrost 6 15A Lt Blue Back-Up Lamps/Air Conditioning, Speed Control, TR Sensor 7 10A Red Starter Relay Power, TR Sensor 8 5A Tan Radio Mute, Power Antenna, GEM Module 9 10A Red Anti-Lock Brake System, Central Temperature Monitor 10 20A Yellow Electronic Engine Control (EEC) Relay, Ignition Coil, PATS, Radio 11 5A Tan Air Bags, Alternator Indicator Lamp 12 5A Tan Gauges, Warning Lamps, Transmission Control Switch, GEM Module, Integrated Control Panel Autolamps 13 5A Tan Air Bags, Blower Motor, Electronic Automatic Temperature Control 14 5A Tan Light-Out Module 15 10A Red Multi-Function Switch (Turn Signals) 16 — — Not Used 17 30A Lt Green Front Windshield Wipers/Washers 18 5A Tan Headlamp Switch Illumination 19 15A Lt Blue Rear Window Wiper/Washer 20 5A Tan Radio Memory, Phone, Remote Anti-Theft Personality (RAP) Module, Integrated Control Panel (ICP) 21 20A Yellow Cigar Lighter 22 5A Tan Power Rearview Mirrors, Antenna, Decklid Lamps, Autolamp 23 5A Tan Generic Electronic Module (GEM) Power, Remote Anti-Theft Personality (RAP) Module, Passive Anti-Theft System (PATS) Module 24 5A Tan Integrated Control Panel, Radio, Speedometer 25 10A Red Diagnostics (Data Link Connector) (DLC) 26 15A Lt Blue Decklid Release 27 10A Red Battery Saver System 28 15A Lt Blue Stoplamps, Speed Control 29 15A Lt Blue Multi-Function Switch (Hazard Lamps) 30 15A Lt Blue Highbeam Headlamps, Daytime Running Lamps (DRL), Instrument Cluster 31 5A Tan Tail Lamps 32 5A Tan Heated O/S Rear View Mirrors, Integrated Control Panel (ICP) 33 5A Tan Power Window and Lock Switch Illumination 34 — — Battery Saver Relay 35 — — Driver Unlock Relay 36 — — Rear Defrost Relay 37 — — Interior Lamp Relay 38 — — Driver Power Window Relay (One Touch Down) 39 — — Accessory Delay Relay

your owner manaul has it. your fuse cover should have chart too.

here is 96 tracer. You also have main fuses under hood.

INTERIOR FUSE JUNCTION PANEL REFERENCE CHART Fuse Fuse Rating Color Protected Components (REAR WIPER) 10A Red Rear wiper and washer motors, heater and A/C relays, daytime running lamps control (Canada), climate control assembly panel illumination HAZARD 15A Blue Front and rear turn signal lamps, turn signal indicator lamp, indicator flasher ROOM 10A (1.9L)
15A (1.8L) Red
Blue Dome and map lamps, safety belt warning chime, ignition key illumination, luggage compartment lamp, vanity mirror lamp, radio chassis (memory), power door lock relay, shift interlock system, powertrain control module (PCM), radio amplifier (memory) ENGINE 15A Blue Fan control (FC) relays, PCM relay RADIO 15A Blue Radio chassis, radio amplifier, remote control mirror, instrument panel illumination (DOOR LOCK) 30A Light Green Power door lock actuators BELT 30A Light Green Passive restraint control module, passive restraint motors (POWER WINDOW) 30A Light Green Window regulator electric drives METER 15A Blue Instrument cluster, backup lamps, rear lamps, speed control system, shift interlock system, safety belt warning chime, passive restraint control module, hazard flasher, PCM (1.8L Canada) WIPER 20A Yellow Windshield wiper motor and windshield washer pump STOP 20A Yellow Stoplamp, horn (1.9L only), rear hi-mount lamp TAIL 15A Blue Parking lamps, cornering lamps, rear lamps, license lamps, compartment lamp, instrument panel illumination (SUN ROOF) 15A Blue Sliding roof panel motor ABS 10A Red Anti-lock brake system (ABS) (1.8L only) (DEFOG) 20A Yellow Rear window defroster HEATER 30A
circuit breaker — A/C blower motor HO2S
(ON INTERIOR FUSE JUNCTION PANEL SIDE) 10A (1.9L)
20A (1.8L) Red
Yellow Heated oxygen sensor (HO2S) CIGAR
(ON INTERIOR FUSE JUNCTION PANEL SIDE) 20A Yellow Cigar lighter knob and element CIGAR 20A Yellow Cigar lighter OBD II 10A Red Data link connector #2 BLOWER 30A Light Green Blower motor relay HORN 20A Yellow Horn (1.8L only)