Even with the switch turned all the way to high, the lights in my instrument cluster are all too dim on my1992 dodge w250 truck.I have bulbs in all of the holes available.This instrument panel seems just like the one on my old 1984 dodge truck which lit up very bright.
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Re: Even with the switch turned all the way to high, the...
Two things you need to check. 1)check the grounding. A poor grounding almost always causes any light to be dim including your headlights. 2)Your dimmer switch has a potentiometer which could be corroded or a bad resistor in the switch.
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I'm not sure what the question is, as I don't know what you mean by "turn on fuse". And which dash light won't go on? If you mean all dash cluster lights do not go on, even with a good fuse installed, does the headlamp switch turn to dim or increase these bulbs? If so, and it's not working, you may have a bad switch, or some instrument clusters get all their power from a plug which locks into the back of the cluster. These sometimes get loose or the lock tab broken, thus making poor connections. Also, helps to know what vehicle you are working on.
Which insturment cluster does your's have ? electronic instrument cluster or standard instrument cluster !
Standard insturment cluster - speedo / odometer Speedometer/Odometer
The speedometer and odometer provides speed information based on a speed/distance pulse signal from the vehicle speed sensor (VSS). The VSS is mounted on the speedometer driven gear in the transmission.
Could be the VSS is bad .
The horn system includes the following:
steering wheel control switch harness
steering wheel pad horn switch, which is part of the driver side air bag module. For additional information, refer to Section 501-20B .
The horn is located behind the front bumper mounted to the radiator support.
Is the air bag light lit on the insturment cluster ? If it is the clock spring could be the problem . If not lit check the circuits from the horn relay .
Which headlamps don't work ? Low beams , high beams , both ?
The high beams are inoperative
GO to Pinpoint Test C .
The low beams are inoperative
GO to Pinpoint Test D .
Principles of Operation NOTE: Due to varying wattage ratings and resulting current draw, certain aftermarket headlamp bulbs may cause the lighting control module (LCM) to shut down the short circuit protection, resulting in the low beams becoming inoperative. Verify that the headlamp bulbs meet Ford specifications.
The headlamp system consists of:
two aerodynamic halogen headlamp bulbs and retainers
lighting control module (LCM)
circuit wiring and circuit protection
In normal operation:
With the multifunction switch in the low beam position, power is supplied by the LCM to the low beam elements through the multifunction switch.
With the multifunction switch in the high beam position (forward detent), power is supplied to the high beam elements and to the high beam indicator in the instrument cluster.
When the multifunction switch is pulled toward the steering wheel, the flash-to-pass switch (part of the multifunction switch) is closed and power is supplied to the high beam elements. When the switch is released, they return to low beam operation.
The battery saver feature of the LCM will automatically turn off the courtesy lamps, demand lamps, headlamps, or parking lamps under the following conditions:
The ignition switch is in the OFF position.
The headlamp switch is in parking lamps ON or headlamps ON positions.
After 10 minutes.
The headlamp switch is a multi-position switch.
The positions include OFF, PARK, and HEAD.
With the headlamp switch in the PARK position (first detent), a signal is supplied to the LCM which powers the front parking lamps, the tail lamps, the side marker lamps, and the license lamp.
With the headlamp switch in the HEAD position, power is supplied to the headlamps through the LCM and the multifunction switch.
The panel dim switch (part of the headlamp switch) is located above the headlamp switch. The panel dim switch operates only with the parking lamps or headlamps on.
When the panel dim switch is held in the up position, the instrument panel lighting will progressively brighten.
When the panel dim switch is held in the down position, the instrument panel lighting will progressively dim.
For additional information, refer to Section 413-00 .
Headlamps On Warning Chime
If the headlamp switch is left in either the PARK or HEAD position and the driver door is opened, the LCM will sound a headlamps on reminder chime when the following conditions occur:
The ignition switch is OFF with the ignition key out.
The driver door is ajar.
For additional information, refer to Section 413-09 .
Inspection and Verification
Verify the customer concern by operating the system.
Visually inspect for obvious signs of mechanical and electrical damage.
Usually a problem with the mini-lights inside the cluster, the circuit board or the dash light dimmer switch. You can take the cluster out and see if the bulbs can be replaced or check the dimmer. Not connected to automatic dimmer headlights.
Instrument lites are on a small amp fuse 3 or 5 amps. The lite switch may supply the power to the instument lites. to the fuse box first,then to the instrument panel. LOOK for the color code of the wire to the fuse panel and to the instrument cluster,check for power,in this wiring.Check bulbs and the grounding wire for the panel.Check all the plug ins.
It may not be a bulb, as the instrument cluster usually has a number of bulbs and they probably didn't all blow at once. Pulling instrument clusters can be touchy and may not be for the average "shadetree mechanic" however, typically there are a few screws above the cluster going into the dash pad and a few hidden behind the trim panels below the cluster.
A cluster is the "instrument cluster". The speedo, gas and temp gauges, tachometer etc. The cluster is serviced as a unit only. You cannot get individual components. You would be way better off sending your cluster to the remanufacturer to be rebuilt and sent back to you. Because if you buy a cluster from some place and give your cluster as a "core" and the one you bought is not the right one, you cannot return it for the right one. You will have to buy another one. They are NOT RETURNABLE. Good luck.
Your instrument cluster has replaceable bulbs in the back of it. It is possible that 1 or two of the bulbs have gone out. If you are somewhat mechanically inclined, you can get the cluster out. It is best to remove the steering wheel to get the cluster out. Only a few screws hold the cluster in. I would recommend replacing all the bulbs while you have it out. Also, make sure and replace 1 bulb at a time, you will have some holes that do not have a bulb, depending on the vehicle equipment options.