Question about Chevrolet C3500

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BATT. DRAINS DOWN AFTER 5 DAYS, HAS NEW BATT. AND ALT. CABLES ARE CLEAN, LIGHT UNDER HOOD DISCONN. STEREO DISCONN. BLOWER MOTOR DISCONN. STEREO AMP DISCONN. NONE OF THE OTHER LIGHTS STAY ON AND THE VOLT METER IN THE DASH DROPS EVRYTIME THE HEAD LAMPS ARE ON AND DOES NOT GO BACK UP.

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What kind of car is it un hook the alt and see if it goes down sound like it is bad if you turn the headlights on and it drops the regulator is not working is it on the alt or on the car

Posted on Oct 14, 2010

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You may have a relay stuck. Check the power door locks, power windows, power seat, furl pump relays, etc.

Posted on Oct 14, 2010

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I have a 2005 Dodge ram 1500 slt quad cab. multiple upgrades nothing seems to work right please help?


Think you have voltage regulation hassles. Assuming your connections are squeaky clean and have very low resistance, your charging voltage should be at least 14 volts. And when you turn on heavy drain accessories the voltage drop should be minimal. 13 volts is much too low.

Feb 05, 2016 | Dodge Cars & Trucks

1 Answer

Can blower motor, cig. lighter, fan cooling motor, door locks all be tied into the blower motor relay faulting out?


Sounds more like a key switch or fuse box problem.
The circuits you mentioned would be on separate fuses but could be connected to the key switch. The relays are grounded by the engine computer to be energized.

Nov 20, 2015 | 2001 Pontiac Aztek

2 Answers

Sits overnight and battery drains


Did you check the battery? Take the car and have a load test preformed on it, simply checking the volts will not tell you how the batt is doing.

Also check for any trunk lights, hood lights, glove box lights that are not going off.

Hope this helps.

Dec 29, 2012 | 1992 Isuzu Rodeo

1 Answer

Whenwhen blower is on 4.2 engine idels down & sometimes stalls


try changeing air fiter and remove sensor disconnent batt. and spray electric spray make sure it dries put back together and connent batt.

Sep 20, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Have a 1997 olds silhouette. Replaced alternator and got a rebuilt one after batt light and subsequent abs and tcs light came on and van stopped running. new alternator seemed fine for four days. abs and...


1. Check the negative terminal where it is grounded on the chassi (frame) or block. Clean and secure connection. Also, look for an additional ground that my be connected from the hood to the rear fire wall. These are usually found on the passenger side; if none are found, get some wire and run it from the hood to the rear fire wall, or side fire wall on either side of the engine compartment.
2. If the car can be jump started: the alternator tests good, the battery tests good - start looking for blown fuses - replace any that are bad. Also, replace the starter relay as it may be shorting out and be bad. This can be found under the hood in the fuse/relay box usually placed near the battery (just behind battery).
3. I also suggest having a technician perform a diagnostics test done before any other parts are replaced (except ground from hood to firewall). This will help diagnose a more accurate issue as why this is happening, and will save you time and money from replacing random parts. Have them test the ECM {electic control module) or "brain/computer".
Please let me know if you need further assitance.
carsandcomps

Aug 25, 2011 | 1997 Oldsmobile Silhouette

1 Answer

New batt. new alt, 97tercel. batt still runs down after a day or so. alternator puts out til headlights are turned on ,then the out put voltage slowly drops below 12volts.


REPLACE BATTERY CABLES THE POSITIVE CABLE FEED WIRE TO ALTERNATOR BROKEN ON INSIDE IF ALL IS GOOD YOU HAVE WRONG AMP ALTERNATOR.

Dec 16, 2010 | 1997 Toyota Tercel

3 Answers

Batt. and alt. only last 6 months or so then won't start car


Ok, if the cranking amps is like 70AMPs or 100 AMPS as measured by an inductive ammeter on the battery cable when starting, and it does NOT start, then it's a bad starter.

However, if it does start, that's normal.

On a car that old, I would check that the battery cable ends are squeaky clean, wire brushed, or even replaced if cleaning is not possible.

Usually, a battery that is tested good will be good under a load test.

Also, try to use an ammeter to find out if there is a drain on the battery above .2 A while it sits there turned off. This could lead to a solution if you investigate where a short may be.

Jul 05, 2010 | 1995 Buick Regal

2 Answers

Dead battery new batt alt gr cable no fues blow jo


Common battery drain would be 1. the light under the hood staying on when the hood is closed. 2. The vanity light over the drivers sun shade if there is anything up there that is keeping the vanity shades from closing all the way. 3. pull the fuse to the rear wiper motor, common for the wiper motor to lose it's position and tries to close even when it's already closed. 4 there is a short in your 4wd encoder motor on the transfer case.
Start with the simple and check them all one by one till you have determined where your voltage drain is coming from.
Thank you for using fixya and good luck

Jun 12, 2010 | 1995 GMC Jimmy

1 Answer

Charging problem 1991 volvo 240


14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.

Dec 29, 2008 | 1991 Volvo 240

1 Answer

1997 Jeep grand Cheeroke


My Answer:

Being an expert in this Electronics field this should be fairly easy.

It appears your charging system is functioning OK as you did the QUICKIE alternator/regulator test and that part appears to be fine.

Next - Never ASSUME you have a good, or NEW battery. I've seen brand new batts fail a few months after purchase for no known reason at all. Water level should be topped off esp during Hotter weather as water level will drop as the batt ages.

AND - when in doubt - Always do a hydrometer test on each cell, and make sure all cells read equally at approx 1.285 to 1.290 - indicating a fully charged batt.

When doing a LOAD TEST with an external 100 Amp Load Tester make sure you disconnect the POS terminal cable (or better yet both batt cables) on the batt before doing a good Load Test on a fully charged batt.

Batt voltage on a good fully charged batt should never drop much below 11.4 to 11.7 volts doing a 10 second load test using a Load Tester similar to say one bought at Harbor Freight Tools for like $15 when they are on sale.

If the top of the batt is wet (for whatever reason such as dew-point or leaky batt acid) this will cause the batt to self-discharge right across the top of the batt. Just like putting a small light-bulb across the batt posts and causing a drain. It happens more times than you care to know. When I worked at SEARS I seen it day in and day out......trust me I know!

Next - you'll want to check for a couple things at night, or else daylight will work as well - if you have good eyesight. You want to check and make sure your "backup lights" aren't ON when the Headlights Switch is turned OFF and the Ignition Switch is OFF as well. Sometimes a SHORTED Transmission Backup Light Switch will cause a battery drain with everything shut off. Sometimes!

Also - If you have any Interior Lights left on when the SUV doors are all closed that will surely drain the battery down.

A radio/stereo left ON will do the same as well.

A shorted tail-light (or any marker light) will also cause a battery to drain over time.

Jeeps that have a under the hood light Mercury Tilt Switch for the Engine compartment sometimes can have this switch mounting come loose and when you shut the hood the light will actually stay lit thus draining the batt down as well. Make sure you check it at NIGHT during darkness as it will show up better.

If all this proves NOT to be the cause then you will have to do an actual DVM inline amp meter test to see just how much current leakage (shorting) you have. A fuse block isolation test will next have to be done to isolate from which circuit leg the short (or current drain) is coming from.

Once that circuit is isolated then it's just a matter of finding the shorted device or shorted wire(s).

If you just added anything new electrical wise to the Jeep recently- then that is a good starting point - for if the problem wasn't there before that time, and now it is - then there is your culprit!

If you are using an external battery charging PV (Photo-voltaic) panel, and it's bad for any reason - then it will drain your battery down as well, esp if the blocking or back diode goes bad.

Also - If you have a dual battery system with a BATTERY ISOLATOR installed you might want to double check all your wiring there as well - as I've seen them go bad and cause many a battery problem!

It's gotta be something I just went over here - as I covered everything......

Let me know what it was OK?

Thx,

Frank

Jul 12, 2008 | 2003 Jeep Grand Cherokee

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