 750mV from battery to ground, Tracing the short: any usual suspects? |
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| Prospectfarms |
 Mar 27 2012, 06:32 AM
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Member  Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest  |
Key off. Red terminal to body gives somewhere between 1V and 750mV. (IMG:style_emoticons/default/sad.gif) To me that seems like a bare wire short to ground but I'm not an expert.
Likely spots? Anyplace I could test first before tracing the whole electrical system? How about a short (N.P.I.) list of always-hot wires in the car. Doesn't have to be comprehensive -- just looking for a starting point. Thanks. |
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| Prospectfarms |
Mar 27 2012, 09:40 PM
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Member Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest |
If I understand what your saying, if there was only a short, and no voltage drop, I'd see battery voltage (@13.11V.) between clamp and post ? (key off, no accessories, clamp not connected to post)
I tried to test the clamp for voltage drop yesterday. With engine running I can stab the heavy red wire with a probe and get the same voltage to ground as I get measuring from the post to ground. Not a good way to test? |
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Posts in this topic
Prospectfarms 750mV from battery to ground Mar 27 2012, 06:32 AM
stugray What?
Does the car run?
You should have ~12-13 Vo... Mar 27 2012, 08:25 AM
Prospectfarms
What?
Does the car run?
You should have ~12-13 V... Mar 27 2012, 08:49 PM ape914
What?
Does the car run?
You should have ~12-13 ... Mar 27 2012, 09:28 PM Valy
What?
Does the car run?
You should have ~12-13 ... Mar 27 2012, 09:36 PM Prospectfarms
[quote name='Prospectfarms' post='1655151' date='... Mar 27 2012, 09:51 PM Valy 1St, your battery is dead.
Disconnect it and measu... Mar 27 2012, 10:36 AM Prospectfarms
1St, your battery is dead.
Disconnect it and meas... Mar 27 2012, 08:53 PM underthetire To check ghost drains
Remove red wire from batter... Mar 27 2012, 11:36 AM Prospectfarms
To check ghost drains
Remove red wire from batte... Mar 27 2012, 08:57 PM Spoke Here's some basic voltages to check.
1) Measu... Mar 27 2012, 01:01 PM Prospectfarms
Here's some basic voltages to check.
1) Meas... Mar 27 2012, 08:59 PM kg6dxn The voltage you are reading could be capacitance f... Mar 27 2012, 10:00 PM Prospectfarms
The voltage you are reading could be capacitance ... Mar 27 2012, 10:32 PM rhodyguy try taking the inline fuse for the stereo out and ... Mar 28 2012, 11:18 AM kg6dxn You want to measure amperage. You want to see less... Mar 28 2012, 05:18 PM Prospectfarms Dugout my real mulitmeter. Replaced fuse and batte... Mar 28 2012, 07:26 PM Valy You are good although 25mA for the stereo is a bit... Mar 28 2012, 08:32 PM Prospectfarms
You are good although 25mA for the stereo is a bi... Mar 29 2012, 05:48 AM Valy What else is always on? Clock? Mar 29 2012, 08:43 AM warrenoliver
What else is always on? Clock?
when I had batt... Mar 29 2012, 11:20 AM Prospectfarms Sorry for the delay responding. Unfortunately I do... Mar 29 2012, 10:36 PM kg6dxn Your drain seems a little high with no radio or cl... Mar 29 2012, 10:47 PM Prospectfarms
Your drain seems a little high with no radio or c... Mar 30 2012, 09:34 PM |
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