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post #1 of 75 (permalink) Old 03-07-2006, 06:53 PM Thread Starter
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For the auto mechanics

For the mechanics out there……. I have a 2002 Isuzu Rodeo 4WD V6 …while driving the dash lights dim the radio goes out all the gauges go to the off position, ABS light comes on but the no engine loss it keeps going no loss of power steering….then it goes back to normal…

Anyone have any ideas or had a problem like this?
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post #2 of 75 (permalink) Old 03-07-2006, 06:56 PM
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Alternator might need to be replaced. I'd check the battery first though,

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post #3 of 75 (permalink) Old 03-07-2006, 07:03 PM
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Loose connection behind the dash is my educated guess.

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post #4 of 75 (permalink) Old 03-07-2006, 07:07 PM
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How long have you been experiencing this and over how long of a period of time does it take for the whole scenario as you have relayed to play out?

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post #5 of 75 (permalink) Old 03-07-2006, 07:09 PM Thread Starter
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Quote:
Originally Posted by shadrach
Alternator might need to be replaced. I'd check the battery first though,
if it is the alternator i should feel the engine loose power....
battery checks fine
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post #6 of 75 (permalink) Old 03-07-2006, 07:10 PM Thread Starter
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Quote:
Originally Posted by Phily-D
How long have you been experiencing this and over how long of a period of time does it take for the whole scenario as you have relayed to play out?
Just started

about a min or so
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post #7 of 75 (permalink) Old 03-07-2006, 07:13 PM
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Quote:
Originally Posted by ed0638
if it is the alternator i should feel the engine loose power....
battery checks fine
Not necessarily; never hurts to start at the power sources before ripping into a dashboard looking for loose wires.

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post #8 of 75 (permalink) Old 03-07-2006, 07:37 PM
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Start with the easy stuff, check the voltage from the alternator and make sure the battery is grounding. Clean the terminals while you are at it.
Then I would start chcking grounds from the dash.
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post #9 of 75 (permalink) Old 03-07-2006, 08:12 PM
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Something shorting out or you have a weak alt or battery.

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post #10 of 75 (permalink) Old 03-07-2006, 09:03 PM
 
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I doubt it is a battery or alternator. Since you have no starting issues.

If your battery or alternator couldn't handle a power surge or had a spike, then i can see that occuring.

I would look at fusible links, or main power circuits. They should have a box with all the large fuses. Sometimes a large fuse being more then 30 amps might have gotten loose. Then check the connection that go to the dash.
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post #11 of 75 (permalink) Old 03-07-2006, 09:15 PM
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Voltage regulator.
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post #12 of 75 (permalink) Old 03-07-2006, 09:53 PM
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Post from the only Professional auto mechanic;

you have a charging system problem, alt. or battery.

the voltage regulator is internal in the alt.

the ABS light comes on because the ABS system is seeing low voltage and will not work.

my first check would be to check connections at the battery, then get the battery tested, you could have loose cells in the battery that move around and short out. if thats ok, then load test the alt. Easy backyard way is to turn on ALL the power things you can, fan, a/c, bright headlights, flashers, rear window defroster, and put a voltmeter on the battery. its not fool proof, but it might show a problem.


HAVE A NICE DAY

-Mopar

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post #13 of 75 (permalink) Old 03-07-2006, 09:57 PM
 
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Quote:
Originally Posted by MoparBoyy
Post from the only Professional auto mechanic;
HAVE A NICE DAY
dont you have to know stioch before becoming a professional?


I find it better to hook a scope up to the alternator so i can see the diode pattern.
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post #14 of 75 (permalink) Old 03-07-2006, 10:01 PM
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Quote:
Originally Posted by oldschoolninja
dont you have to know stioch before becoming a professional?


I find it better to hook a scope up to the alternator so i can see the diode pattern.
humm.. i doubt you even know how to use one..

the funny thing is you mentioned the alt. is prolly ok due to it starts fine last i checked the alt. can be out of the damn car and it will start fine.

i'm sorry but your knowlage is sub-par in this catagory, i would be battling whits with an unarmed man

-Mopar

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post #15 of 75 (permalink) Old 03-07-2006, 10:06 PM
 
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Quote:
Originally Posted by MoparBoyy
humm.. i doubt you even know how to use one..

the funny thing is you mentioned the alt. is prolly ok due to it starts fine last i checked the alt. can be out of the damn car and it will start fine.

i'm sorry but your knowlage is sub-par in this catagory, i would be battling whits with an unarmed man

so the battery will never lose potential energy?

And you cant run all cars with the alternator out because not all cars have the charging system designed the same way.
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post #16 of 75 (permalink) Old 03-07-2006, 10:12 PM
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Quote:
Originally Posted by oldschoolninja
so the battery will never lose potential energy?

And you cant run all cars with the alternator out because not all cars have the charging system designed the same way.
o geez.. i forgot, your the one that speaks general, and then when i do it you come down on me.. i forgot... my bad



IF: the alt was outputing lets say 13.1 volts instead of what it should at say 14.7 volts, theres still enough to charge the battery, and keep the battery "ok" but when full load is applied to the alt, he starts to experaince this problem.

SO therefor you have a bad alt. and the car still starts fine.

(NOTE: the voltages that were used were for exsample only, and are not specific to every car on the planet)

also: i have a stupid piece of paper on the wall, and a big fatty paycheck that says i'm a professional (please note sarcasim)

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post #17 of 75 (permalink) Old 03-07-2006, 10:23 PM
 
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But during the time, he experienced that problem; he didn't have any loads on the electrical system. Unless, he is unaware of it, such as a cooling fan coming on, abs pump activating, a/c clutch locking up etc...

The car is going to start fine a few times. But at 13.1v, the system is hardly putting a charge on the battery. And if he is driving with his headlights on, then the alternator will not put a proper charge on the battery. After a few days, his battery will be dead. He will be noticing dim headlights and dim dash while driving.


I sewn a patch on my shirt that says im a professional.
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post #18 of 75 (permalink) Old 03-07-2006, 10:35 PM
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Quote:
Originally Posted by oldschoolninja
But during the time, he experienced that problem; he didn't have any loads on the electrical system. Unless, he is unaware of it, such as a cooling fan coming on, abs pump activating, a/c clutch locking up etc...

The car is going to start fine a few times. But at 13.1v, the system is hardly putting a charge on the battery. And if he is driving with his headlights on, then the alternator will not put a proper charge on the battery. After a few days, his battery will be dead. He will be noticing dim headlights and dim dash while driving.
Of course he doesnt' know what loads are on the alt while your driving.. SHEESH..

i said 13.1 was an EXSAMPLE.. maybe its 13.2 its funny also how you mentioned he would see a dim dash... ISN"T THAT ONE OF HIS COMPLAINTS?!?!?!!?

and for shits and giggles i'm gonna give you a quick exsample;

Customer comes in, complains that ONCE the car wouldn't start, needed a jump, car has been running FINE for a month but still wanted to get it checked out cause SOMETIMES he thinks the headlights look dim.

Pull the car in, everything seems ok, starts fine and dandy, runs down the road as good as it can, turn on the a/c, rear defrost, high beams, wipers, radio, everything i could think of. huh.. shows 14.1 volts at the battery.. everything seems ok.. Let the car run for about 15-20 mins with everything going, and what do you know.. it slowly drops to about ~12.7-13.2.. then it comes back.

replace alt.

recheck car for over an hour, problem is now gone.

ODD huh?

Seriously sweetie, time for bed and let the grown ups talk

-Mopar

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post #19 of 75 (permalink) Old 03-07-2006, 10:38 PM
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o yeah and your gonna mention how my story about the one time it didn't start which prolly in your mind shows its an alt.

but how do i know the guy didnt leave the headlights on? or the inside light on? or leave a cell phone plugged in and went on vacation for 2 weeks? YOU DONT

Ed's problem is just one of many i fix all day long. i think i know what im talking about

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post #20 of 75 (permalink) Old 03-07-2006, 10:38 PM
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I am shutting off my TV. This is comedy gold!

"The man who makes me your enemy, it is he who be the guilty one....Here I abandoned peace and desecrated law; fortune it is you I follow. Farewell to treaties. From now on war is our judge!"
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post #21 of 75 (permalink) Old 03-07-2006, 10:40 PM
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Quote:
Originally Posted by maoisn
I am shutting off my TV. This is comedy gold!
bring over some popcorn!

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post #22 of 75 (permalink) Old 03-07-2006, 10:41 PM
 
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Quote:
Originally Posted by MoparBoyy
Of course he doesnt' know what loads are on the alt while your driving.. SHEESH..

i said 13.1 was an EXSAMPLE.. maybe its 13.2 its funny also how you mentioned he would see a dim dash... ISN"T THAT ONE OF HIS COMPLAINTS?!?!?!!?
His complaint was an intermittent dim. The dim im talking about is constant till the battery goes dead or below 12.6 volts DC.


Quote:
replace alt.

recheck car for over an hour, problem is now gone.

ODD huh?
that would be commonly caused by a bad diode, allowing current to flow in the wrong direction in the alternator.

Quote:
Seriously sweetie, time for bed and let the grown ups talk
uh, vcook can make your bed warm, he likes you more.
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post #23 of 75 (permalink) Old 03-07-2006, 10:42 PM
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Quote:
Originally Posted by oldschoolninja
that would be commonly caused by a bad diode, allowing current to flow in the wrong direction in the alternator.

and were is are the diodes??????????? (totally loaded question)

-Mopar

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post #24 of 75 (permalink) Old 03-07-2006, 10:43 PM
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This is fun to watch. And my 2 cents (as someone who's been doing this every day for 7 years and has a few pieces of paper on the wall that say I know what I'm doing ): Moparboyy is right.

-Ryan
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post #25 of 75 (permalink) Old 03-07-2006, 10:44 PM
 
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Quote:
Originally Posted by MoparBoyy
o yeah and your gonna mention how my story about the one time it didn't start which prolly in your mind shows its an alt.

but how do i know the guy didnt leave the headlights on? or the inside light on? or leave a cell phone plugged in and went on vacation for 2 weeks? YOU DONT
you dont know. since the customer doesn't know anything about cars.

Thats why you do a battery test, charging test,and a diode pattern test with a scope. , then a current draw test.
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post #26 of 75 (permalink) Old 03-07-2006, 10:45 PM
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Quote:
Originally Posted by oldschoolninja
His complaint was an intermittent dim. The dim im talking about is constant till the battery goes dead or below 12.6 volts DC.

So then why are you even talking about it?


"hey i got coolant in my oil.. maybe its related to all this??" (please note sarcasim again, dont start more useless posts about this)

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post #27 of 75 (permalink) Old 03-07-2006, 10:45 PM
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Quote:
Originally Posted by MoparBoyy
bring over some popcorn!
"You must spread some Reputation around before giving it to MoparBoyy again."

"The man who makes me your enemy, it is he who be the guilty one....Here I abandoned peace and desecrated law; fortune it is you I follow. Farewell to treaties. From now on war is our judge!"
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post #28 of 75 (permalink) Old 03-07-2006, 10:46 PM
 
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Quote:
Originally Posted by MoparBoyy
and were is are the diodes??????????? (totally loaded question)
in the rectifier. So it turns alternating current into direct current.
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post #29 of 75 (permalink) Old 03-07-2006, 10:47 PM
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Quote:
Originally Posted by oldschoolninja
Thats why you do a battery test, charging test,and a diode pattern test with a scope. , then a current draw test.
wow,.. you are off the wall man.. your first post said it wasn't a battery or alt.

you should copy my post.. edit your first post.. then everyone will think your right

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post #30 of 75 (permalink) Old 03-07-2006, 10:48 PM
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Quote:
Originally Posted by oldschoolninja
in the rectifier. So it turns alternating current into direct current.
and the rectifier is were again??? come on.. just say the car part i want to hear.

-Mopar

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