Question about 1998 Chevrolet K1500

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When I drive in rain, my ammeter shows discharge. as I continue to drive, the needle fluctuates between normal and discharge. What cause this and how do I correct this.

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Does the needle fluctuations occur in time with the windshield wipers, if they are in use?

Posted on Sep 28, 2009

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2005 chevy equinox. The needle on the temp gauge is normally steady but from time to time swings back and forth from hot to cold and then normal, it also shows a code of p1245. What could be wrong??


The code P1245 is for the Intake Plenum Switchover Valve.

This probably has nothing to do with the gauge fluctuations. The gauge problem is probably one of three possibilities:

  1. Low coolant level in the system. When coolant levels get low, air moves thru the system and when it reaches the temp sensor, will cause fluctuations.
  2. Defective coolant sensor. These can fail over time as do all sensors.
  3. Defective gauge in the dashboard.

Nov 12, 2015 | Cars & Trucks

1 Answer

Ammeter showing a discharge


1. Is the lights glowing correctly?
2. check the battery contacts once again re fix them.
3. check the polarity of control unit (Rectifier circuit).
4. check the charging current without load. if it is good it is to be expected. when there is 20 amp load.

Jan 09, 2014 | Cars & Trucks

1 Answer

My speedometer goes up and down , and my radio goes on and off


The speedometer can fluctuate rapidly under normal driving conditions when the car's speed changes abruptly, but sometimes the needle can start swinging around the dial without any fluctuation in speed. If the hairspring comes loose or breaks, it can't hold the speed cup in place, and the result is a fluctuation in the dial. In electrical speedometers, if the circuit that counts the magnetic pulses fails, it can cause the speedometer read-out to vary from the actual speed and to shoot upward or downward without notice. If a speed sensor in the automatic transmission starts to malfunction, it can affect the speedometer and cause fluctuations. In these instances, either the speedometer or the sensor needs replacement.

Sep 26, 2013 | Cars & Trucks

1 Answer

What cause rpm gauge needle to fluctuating from1000 to 2000?


fuel filter,air filter,could be TPS sensor,crankshaft sensor.weak fuel pump.

Feb 21, 2013 | Cars & Trucks

1 Answer

How many amps on amp meter 1995 jeep cherokee


I think you are looking at the voltmeter, not the ammeter.

11 volts means the alternator is not charging if the engine is running. There are some conditions that exist in normal operation where the voltmeter can register 11 volts and it not be an issue, but if you are driving down the road, and only have 11 volts- the vehicle is running off the battery to keep the engine functioning for only a few miles more.

An ammeter in a car or truck has to be able to handle the full output of the alternator- which can range from 35 amps for some, up to 165 amps for others and higher. It is this reason ammeters in motor vehicles rarely have any numbers on them, just plus or minus sign, or the words charge discharge.

Feb 07, 2012 | 1995 Jeep Grand Cherokee

2 Answers

I think I have an alternator problem? The charge needle on the dash guage is spiking to 16 volts off and on. I put a voltmeter to the battery and it is only charged to about 11 volts. With the engine...


Hello
The normal charge of alternator on idling is about 13 to 14 volts. 12 is acceptable but keep in mind it will need attention soon. The needle fluctuates due to the revs of the alternator - there is nothing to worry about. Just look that the charge is always above 12V on idle.

Jul 14, 2011 | 1996 Dodge Intrepid

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Fluctuating hot water gauge for Subaru Baja


check your coolant level, its may be low causing the fluctuatiion also the loss of heat. if its ok replace your thermostat its not regulating tempature right

Feb 27, 2010 | 2001 Subaru Forester

1 Answer

My 2004 GMC Sierra 1500 has been losing battery charge


Try to locate the cause of the discharge current as below:-

While vehicle electrical system shutdown as for overnight storage, connect an ammeter (with suitable current capacity and sensitivity) across the main ground connection between the battery -ve terminal and vehicle chassis/frame - (-ve of the ammeter to -ve battery terminal post, +ve to vehicle frame),
Carefully disconnect the main battery ground cable from the chassis,
The ammeter will now measure the battery discharge current - a discharge current in the order of 0.5 amp or more is of concern.
If all is well, the current draw should not exceed 50- 100 mA.
Note- Do not switch on any load while ammeter is connected, as ammeter damage or overload will occur.
If an excessive discharge current is observed, remove all fuses etc to eliminate / locate cause.

Oct 14, 2009 | 2004 GMC Sierra

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