NOT WORKING IN ANY SWITCH POSSITION,I CHECKED ALL FUSES,BUT IM NOT GETTING ANY POWER TO THE POWER SIDE OF THE TWO FUSES MARKED INSTRUMENTS AND TAIL LIGHT, BUT THE FUSE IN THEM IS GOOD,I CHANGED THE HEAD LIGHT SWITCH,WHICH DID NOT FIX THEM,PLEASE HELP
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Not for tail lights.
GeT a 12 Volt probe screwdriver with the handle that lights up or volt meter. Remove the bulb turn on tail lights clip to any good ground and put the probe tip on the bump at the bottom of the socket and it should lite up. Now clip ground to side wall of socket and probe both bumps in the center one bump is tail the other is brake. Have someone push on brakes and see if they light when on one bump then check tail on other bump. DO NOT TOUCH THE SIDE WITH CENTER PROB OR IT WILL SHORT BE CAREFUL. this will tell you where the problem is,
Also check fuse holder.
leave fuse in clip to ground turn on tail light and probe both ends of fuse for power.
At the instrument panel fuse block, check 15A fuse 10 (indicators). In the relay center, check 10A fuse 8 (speedometer).
For "back lights" problem: At the left underhood fuse block, check the 20A HEADLAMP BREAKER. At the instrument panel fuse block, check 15A fuse 6C. Both of these supply power to the lamp control module. If you set the park lamp switch to the on position, the tail part of the tail/stop/turn lamps should light, the separate tail lamps should light, the license lamps should light, and the rear marker lamps should light. If any of these don't light check for burned out lamps, bad sockests, and bad wiring or missing grounds (black wires)
Assuming this has the V6, the 15A PARK LPS fuse in the underhood fuse block feeds constant power to the auto park lamp relay. When the relay closes, 12V power passes through the 10A INST LPS fuse in the right instrument panel fuse block to the panel dimmer switch and then to the five instrument cluster lamps.
If by "rear lights" you mean everything in the rear lamp assemblies, power for the tail lights (running lights) starts at the 15A PARKLAMP fuse in the underhood junction block, passes through the automatic lamp control (ALC) relay and the right instrument panel junction block to the tail filament of the dual stop/tail lamp and the separate tail lamp on each side. The 12 V power for the stop lamps is protected by the 20A STOPLAMPS fuse in the left I/P junction block, passes through the stoplamp switch when brakes are applied, stop filament of the dual stop/tail lamps. That leaves the turn signals and the hazard lamps. Power for the turn signals originates at the 10A TURNLAMPS fuse in the left I/P junction block and is applied to the hazard switch. Switch output goes to the turn/headlamp/wiper switch for selection of left or right turn signals. That switch output goes to the turn lamp. Power for the hazard function begins at the 10A HAZRD LPS fuse in the left I/P junction box and goes to the hazard switch. Switch output is sent to the left I/P junction box to make the turn signals flash. That's it. Post a comment if you need more information.
Power is supplied to the instrument illumination by the "TAIL/ILLUM LIGHT" fuse, Fuse #4 (15 Amp) located in the dash fuse block under the left side of the dash. This fuse provides power for both the primary and secondary sides of the TAIL LIGHT relay. The Combination (Headlamp) switch provides a ground path for the primary circuit of the TAIL LIGHT relay. When the primary circuit is completed by the Combination switch, the secondary contacts close and provide power to the tail lamps as well as to all of the instrument illumination bulbs. The ground for the instrument illumination bulbs is a variable-resistance circuit which is controlled by the illumination controller. The final ground for both the combination switch and the illumination controller is Ground G302, located under the center console.
Your instrument cluster and console lights are protected by fuse #2 (15 Amp) in the underhood fuse and relay box. They actually get power from the tail lamp relay. If the tail lamps are working, the relay and the fuse is not your problem. The brightness of these lights are controlled by the Multiplex Control Unit and theCPU built into the instrument gauge cluster. The dimmer circuits are actually integral with the instrument cluster. If the tail lights are working and the lighting in the instrument cluster is working, then the problem is either a CPU failure in the instrument cluster or an open circuit between the instrument cluster and the center console lights. The console lights themselves should have power all the time that the tail lights are turned on. The CPU in the instrument cluster provides ground for them to function. The wiring is a little different depending on which model you have and how it is equipped (LX, DX, EX, LX with side curtain airbags, etc.) however, the function is the same.
I highly recommend scanning your computer network for fault codes before spending a lot of time trying to perform electrical diagnosis. There may be a fault code present that will lead directly to the cause.
hi ,ive got exactly the same problem on my cherokee,ther is a sound of a relay buzzzing under the dash.when i turn on the side lights,nothing,turn on headlamps and i get dip plus side lamps,no dash lights though,after a whils all lights fail but i can pull/flash main beam and hold it on,im taking out the dash area tomorrow,friday ,i have aspare headlamp switch and relay/fuse box ,my mobile is 07712128561,ill keep you posted
Look at fuse #18, a 15 amp fuse, in the fuse block. This fuse powers both the tail lights and instrument cluster lights. Usually both of these light systems are powered by the same fuse so when your cluster isn't lit up you'll know right away that your tail lights aren't working as it's not safe to drive without tail lights. Your brake, turn, and head lamps are powered by different circuits. Hope this helps and good luck!
No interior dash lights and no tail lights on a GM usually means it's time for a new headlight switch. To check the fuse, it's in the middle of the fuse box marked instrument cluster. If the fuse is good, buy the switch. Lights blowing fuses means you either have a bare wire running down the driver's side of the truck or up into the tail light assemblies. There is also a plug in under the box on the driver's side near the bumper that may be getting wet. Hope this helps.