 Was looking for parasitic loss…, Tested today |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| Root_Werks |
 May 15 2025, 01:11 PM
Post
#21
|
|
Village Idiot  Group: Members Posts: 8,863 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
 |
Any multimeter should be able to run this test and within a few minutes, you'll likely find a culprit when you start pulling fuses and relays. One at a time and replacing each one back in turn of course:
Attached image(s) 
|
   |
 
|
| ThinAir |
May 22 2025, 02:12 PM
Post
#22
|
|
Best friends Group: Members Posts: 2,569 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
|
I was very excited to try RootWerks approach since I've had a parasitic loss that has been frustrating me for a quite awhile.
My meter is digital and does not have a mA setting, so I set it on 40 amps since the amps would be well under that. I carefully removed all fuses and relays one at a time and got a consistent reading of .75 amps. Disconnecting the red wires was pretty much the same, although it did get down to .5 amps. So... since disconnecting things never made a difference, where does that leave me as far as finding this? I'm frustrated. |
|
|
|
| Root_Werks |
May 22 2025, 03:19 PM
Post
#23
|
|
Village Idiot Group: Members Posts: 8,863 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest
|
Oh boy, well, there's the starter and alternator. The heavy wires directly from battery to each. Unlikely, but could be one of them.
Did you pull the Voltage Regulator? Other than components, could be a direct short in a wire which can be time consuming to locate. -Dan |
|
|
|
| Superhawk996 |
May 22 2025, 07:54 PM
Post
#24
|
|
914 Guru Group: Members Posts: 7,592 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
|
QUOTE(ThinAir @ May 22 2025, 04:12 PM)  So... since disconnecting things never made a difference, where does that leave me as far as finding this? I'm frustrated. Using a meter capable of measuring 40A to try to find milliamps of parasitic draw isn’t likely to be successful. Would depend on the specifications of the meter of course. Get an appropriate DMM with 10A range and a 400-600 millliamp range. |
|
|
|
| mgp4591 |
May 23 2025, 12:43 AM
Post
#25
|
|
914 Guru Group: Members Posts: 5,833 Joined: 1-August 12 From: Salt Lake City Ut Member No.: 14,748 Region Association: Intermountain Region
|
QUOTE(davep @ May 13 2025, 09:21 AM) Considering a 10 year old battery, I would guess that the battery has lost most of it capacity. I noticed that on my own car one time when it would not run an electric cooler for longer than an hour (@5 amps) but would always start the car. When I replaced the battery I could run the cooler for 8 hours and still start the car. Electric cooler? Please PM me with more info please as I really don't want a full blown a/c system in my car. Thanks! |
|
|
|
| ThinAir |
May 27 2025, 04:27 PM
Post
#26
|
|
Best friends Group: Members Posts: 2,569 Joined: 4-February 03 From: Flagstaff, AZ Member No.: 231 Region Association: Southwest Region
|
QUOTE(Root_Werks @ May 22 2025, 02:19 PM) Oh boy, well, there's the starter and alternator. The heavy wires directly from battery to each. Unlikely, but could be one of them. Did you pull the Voltage Regulator? Other than components, could be a direct short in a wire which can be time consuming to locate. -Dan Nope. Didn't think of the VR. I'll find a meter with the mA setting and try again. Thanks! |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 14th December 2025 - 12:22 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.