PDA

View Full Version : Strange happenings in the volt meter ?


Tunabomber
11-29-2011, 08:49 PM
Ok now what ???

ln the morning when i start my jeep my volt meter spikes...almost peaks out in the red at 18v

it stays in the red until i start turning on accessories then drops a little to around 16-17

once i start driving it slowly and continuously drops until it reaches the normal 13 ish

only does this after 12 hours of sitting
anything less and all is normal

the alt in new only 1 month old
the batt is a blue top optima about 3 years old


any ideas ?:dontknow:

Griswold
11-29-2011, 09:12 PM
Is ur voltage regulator seperate if so when was the last time you checked it out.

Punk in Drublic
11-29-2011, 09:14 PM
have you checked under the hood with a voltmeter? or is this just on the guage? chech at the battery in the am when its peaking, if its normalthere, its just the guage is fucky.

Happypants
11-29-2011, 09:41 PM
Most likely a regulator somewhere, don't
Quote me on it but I think it's incorporated into your harness on the back of the alternator, I might be wrong,

tchevy
11-29-2011, 10:23 PM
first check with multimeter, verify gauge isnt junk. then if it is to high prob regulator, think its internal to the computer on them jeep thingys[cheers]

Tinker
11-29-2011, 10:25 PM
Sounds to me like you've been running with a less than par battery and the excessive and constant charging has done in the alternator.

Trailjunkie
11-29-2011, 10:33 PM
regulator is internal in gm alternators . if the gauge is right (check at the batt ,should be around 13.8) if its16 to 18 then return defective alternator budd.that's what i would do.

Cheese eyes
11-30-2011, 12:17 AM
Load test the blue top after it has sat for a day first [cheers]

Tunabomber
11-30-2011, 01:34 AM
gots my volt meter and ready for the morning [36] thanks [cheers]

Tunabomber
11-30-2011, 01:37 AM
Load test the blue top after it has sat for a day first [cheers]




and how does average joe perform such a test :dontknow:


:confused0006:the only load test i could do here would be with bricks and would prolly result in a broken battery :rolleyes:

atoyot
11-30-2011, 08:04 AM
flux capacitor.................

Griswold
11-30-2011, 08:22 AM
flux capacitor.................

Ha Ha Ha Ha[36]

dirka dave
11-30-2011, 08:57 AM
and how does average joe perform such a test :dontknow:


:confused0006

Use a load tester. [16]

I am above average I guess. :D

Tunabomber
11-30-2011, 09:13 AM
flux capacitor.................


thanks dude but do you remember if it was supost to be 1.21 12.1 jiggawatts
fuck im just so in experienced:(

Tunabomber
11-30-2011, 09:16 AM
gots my volt meter and ready for the morning [36] thanks [cheers]



[27] i sleep in today was late taking meaghan to school ( hauing ass through residential streets in a locked lifted rig with 38's is always fun lol ) no time this morning ...must do tomorro :rolleyes:

Tunabomber
11-30-2011, 09:18 AM
did notice its not turning over as quick as normal..maybe my batt is on the way out :(....damn things are expencive . would just go cheap but with winch and my sterreo :o

85chevy
11-30-2011, 03:39 PM
lol I learned something in school ur Optima battery has a cycle life of about 75-100 compared to 300-400 of a standard battery and the alternator shouldn't put out more then 13.8 volts with AGM batteries.

4skin
11-30-2011, 05:16 PM
the optimas in my chevelle are 6 years old and no problems
nock on wood

Ry' & Jen
11-30-2011, 05:32 PM
What make is your Volt meter?

From what I have read on other 4X4 forums, newer Optima batteries are not as good as they used to be. (Before Johnson Controls bought them)
Could be that your three year old Blue top is on it's way out.

Tunabomber
12-07-2011, 08:32 AM
Well yesterday after a drive from new west to richmond i stopped for gas and almost couldnt start it ???


took a volt meter to the optima last night and it read 12.5

put it on a 10 amp charge and went to bed...going to let it go for 20 hours and clean all connections today then have it load tested tomorro

dirka dave
12-07-2011, 10:07 AM
10 amps all night is a lot.

How hot was your batt ?

Tunabomber
12-07-2011, 10:10 AM
10 amps all night is a lot.

How hot was your batt ?

not hot at all

Tunabomber
12-20-2011, 11:18 PM
well after having it fire up no problem every morning and then be almost unable to turn over 1/2 hour later i said fuk it and pulled every wire going and coming into the batt

Cleaned and wire wheeled every contact point on power and ground

[36][36][36][36][36][36][36][36][36][36][36][36][36][36][36][36]



Holy shit i thought my starter was gonna fly off it turned over so fast



lesson learned....Even though your connections are tight and clean that doesn't mean there is a good connection


all problems resolved :D

85chevy
12-21-2011, 08:41 AM
dame corrosion slowing the voltage

Chopstick
12-21-2011, 11:02 AM
still doesnt explain why it spiked to 18v

if your jeep is anything like a cherokee then our regulators are in our ECUs

Tunabomber
12-21-2011, 05:57 PM
still doesnt explain why it spiked to 18v

if your jeep is anything like a cherokee then our regulators are in our ECUs


i cant explain it either ???? did use a volt meter when the guage said 18v and it was actually 14.5

but now its back to normal [36]

85chevy
12-22-2011, 08:38 AM
silly electical gremlins:dontknow:

4skin
12-22-2011, 09:20 AM
its a jeep thing you will never fully understand

64CJ6Willy
12-22-2011, 10:17 AM
its a jeep thing you will never fully understand

Or want to. That's what makes them ours.