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What should the amp gauge read while the motor is running?

What should the voltage be on the gauge cluster when the motor is running?

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  • Cars & Trucks Master
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14.5 when arunning down the highway with pink floyd on the radio.

Posted on Nov 12, 2014

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My oil pressure gauge always reads as high as it can go when the truck is running. I actually think it is a bad stepper motor. Can anyone confirm my suspicion?


unplug the oil pressure sender and see if the gauge goes to zero. If it does than the old cluster was not working properly and the new one is. If the gauge continues to peg with the sender unplugged than your on the right track with a bad cluster.

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I have a 2000 Ram 3500 cummins 2 WD 5.9 ltr truck and it is reading NO BUS... It works intermitently the gauges; gets into 2nd but tends to stay there [automatic]..tested the computer but indicates th


cluster or bus wires going down, test bus voltage to cluster,if reference voltage ok to cluster then internally a cluster issue,best place to start diagnosis.

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Engine off rpm meter read 4000 rpm


All the gauges are run with little servo motors. 5 or 6 if im correct.
you can buy kits for about $25. youtube has a pretty simple video
on how to remove the gauge cluster and replace them if you have
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Volt gauge reading low but still charging 14.2 volts


the low charge # @ gauge could be caused by bad ground or high resistence in the wireing harness. Don't think it has anything to do with your 4x shifting prob I would check 4x switch and electric motor on transfere case.

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Started with fuel gauge now oil pres. gauge , sometimes tach , these gauges bury themselves around clockwise and don't read properly. Sometimes at highway speed say 50mph the tach is reading 6000rpm, gas...


The gauges in the cluster are driven by stepper motors, these are known to fail. There are vendors on E-bay that offer services to replace the stepper motors. This would require you to remove the cluster from the truck.

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I HAVE A 2003 TRAILBLAZER IM HAVING TROUBLE WITH THE CHARGING SYSTEM,I CHANGE THE ALTERNATOR BUT IT STILL SHOW THE BATTERY GAUGE LOW CHARGE NEED HELP ON WHAT TO DO


You need to check the voltage at the battery itself, if the battery voltage is indicating in the area of 12.5 - 14.0 volts and your dash gauge does not agree, then the dash cluster has a bad stepper motor which drives the gauge.
If the battery voltage agrees with the dash gauge, and the alternator was changed and is assumed good, you need to check the wires going to the alternator, there may a broken connection.

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Instrument panel went dead


Checked Every fuse in the fuse box (no small task).This includes #4 - Power point Instrument Panel, #14 - Day time running lamps (auto lamps doesn't work nor does auto lock), #27 - ignition switch run feed, #35 - Instrument Cluster, #41 - Instrument Cluster, #42 - Delayed Accessory, #45 - Ignition switch run/start feed, #102 - Door locks body security module, #103 - Ignition switch, #110 - Ignition switch, & #116 - Ignition switch. But I also check all other ones as well, they all register OK. AC panel & radio work. Turn signals work. Mileage does not work, trip computer does. So, basically, everything works except auto head-lights, auto locks, and the dash cluster (no MPH, RPM, mileage display, Fuel, Temp, Tran Temp, and Oil Pressure).

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1 Answer

Main fuses for the horn and air bag


Fuse #8, #18 and #22.

Below is a listing of which fuse corresponds with which circuit:

1 - 10 Amp - Transmission Controller, Gauges, Autostick
2 - 10 Amp - Right High Beam Headlight
3 - 10 Amp - Left High Beam Headlight
4 - 10 Amp - Radio, CD Player
5 - 10 Amp - Washer Motor
6 - 15 Amp - Power Outlet
7 - 20 Amp - Tail, License, Parking, Illumination Lights, Instrument Cluster
8 - 10 Amp - Airbag
9 - 10 Amp - Turn Signal Lights, Turn Signal/Hazard Indicator
10 - 15 Amp - Right Low Beam
11 - 20 Amp - High Beam Relay, High Beam Indicator, High Beam Switch
12 - 15 Amp - Left Low Beam Headlight
13 - 10 Amp - Fuel Pump Relay, Power Train Control Module
14 - 10 Amp - Cluster, Day/Night Mirror,Sunroof, Overhead Console, Garage Door Opener, Body Control Module
15 - 10 Amp - Daytime Running Light Module (Canada)
16 - 20 Amp - Fog Light Indicator
17 - 10 Amp - ABS Control, Back Up Lights, Daytime Running Lights, A/C Heater Control Cavity Fuse Circuits
18 - 20 Amp - Power Amplifier, Horn
19 - 15 Amp - Overhead Console, Garage Door Opener, Trunk, Overhead, Rear Reading, and Visor Vanity Lights, Trunk Release Solenoid, Power Mirrors, Power Door Locks, Body Control Module, Aspirator Motor
20 - 20 Amp - Brake Lights
21 - 10 Amp - Leak Detection Pump, Low Rad Relay, High Rad Relay, A/C Clutch Relay
22 - 10 Amp - Airbag
23 - 30 Amp - Blower Motor, ATC Power Module
24 - 20 Amp - Power Window Motors
25 - 20 Amp - Power Door Lock Motors, Power Seats

Apr 02, 2009 | 2004 Dodge Intrepid

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