 how to test alt, with this volt measuremometer ? |
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| jimkelly |
 Oct 4 2007, 09:34 AM
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#1
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Delaware USA  Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region  |
and how to i test battery?
my car barely turns over when i turn the key but it always starts - but just barely. is it my alternator, my battery, or my starter, or other ?? jim Attached image(s) 
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Replies(1 - 10)
| ClayPerrine |
Oct 4 2007, 09:45 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 16,316 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
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Using a volt meter (a digital one is easier to use) check to see if you have 13.8 to 14.5 volts at the battery when the car is idling. It should not drop below 13 volts when the lights are turned on.
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| jimkelly |
Oct 4 2007, 09:55 AM
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#3
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
do i have the dial on the right setting?
do i look at the most middle row of numvers - 10,20,30,40,50 ?? |
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| ClayPerrine |
Oct 4 2007, 09:58 AM
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#4
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Life's been good to me so far..... Group: Admin Posts: 16,316 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille
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Yes... you have it set right. Now you have to figure out which scale to use.
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| Cap'n Krusty |
Oct 4 2007, 10:07 AM
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#5
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
"is it my alternator, my battery, or my starter, or other ??"
Yes. The Cap'n |
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| jimkelly |
Oct 4 2007, 12:57 PM
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#6
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
cap'n - YOU FUNNY : )
-- QUOTE(Cap'n Krusty @ Oct 4 2007, 08:07 AM)  "is it my alternator, my battery, or my starter, or other ??" Yes. The Cap'n |
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| jimkelly |
Oct 4 2007, 01:52 PM
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#7
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
my car is 1975 914 with 1973 2.0 engine
here is a pic of the tester with engine running - and not running - jim i get similar reading not running as i do with my subaru impreza. Attached image(s) 
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| SLITS |
Oct 4 2007, 02:11 PM
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#8
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
If I am reading the scales correctly ... your battery voltage (not running) is 33 VDC and running it is 37 VDC .... so the alt is working.
However, I don't think your meter is set correctly. Does the indicator needle set on "0" when not connected to anything? If not, you have to zero the needle with the screw on the front face of the multimeter. It should read in the range of 12 VDC to 14 VDC (on the 50 scale) (assuming the voltage regulator is working correctly). EDIT: If you zeroed the meter using the right hand zero you need to zero the meter using the left hand zero. Reading from right to left the readings would be 17 VDC at rest and 14 VDC running, which would indicate the alternator is not functioning. To many problems here... the meter appears to be reading incorrectly ... I need an aspirin. |
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| jimkelly |
Oct 4 2007, 04:31 PM
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#9
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Delaware USA Group: Members Posts: 4,969 Joined: 5-August 04 From: Delaware, USA Member No.: 2,460 Region Association: MidAtlantic Region |
i gotta get a me a good meter - this one is fine for checking for power so i dod not get electrocuted but maybe not good for much else? jim
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| Dave_Darling |
Oct 4 2007, 10:33 PM
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#10
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Cheapie Rat Shack $20 digital multimeters are more than good enough for most uses on our cars... And much simpler to read, too!
--DD |
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| Rand |
Oct 4 2007, 10:50 PM
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#11
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Cross Member Group: Members Posts: 7,411 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
Even one of these $3 Harbor Freight specials is good enough for things like this. (IMG:style_emoticons/default/smile.gif)
If you want to spend some bucks for a good one, it's hard to beat Fluke multimeters. |
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