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Showing results for tags 'electrical issue'.
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Hi All, I wanted to thank everyone for all the DIY's and other information on this forum. Its been a BIG help! Anyhow, I have a 2005 Cayenne Turbo which has an electrical issue that will not seem to go away. This issue recently is the battery has been draining intermittently to the point where i let the car sit overnight (10-12 hours) and the battery voltage will go down to 7-8VDC. Other days, I let the car sit for a few days and starts up right away. What I have done/ recorded. I have no Durametric codes when this happens, other than the VBAT low threshold on every module which goes away upon charging the battery and resetting the "module codes" I replaced the battery, one with OEM and bought another one from autozone as a backup, both check out ok. and have been load tested multiple times. (Side note, I do not have the 2nd battery in the trunk) I will get a battery/generator warning every once in a while upon starting which does go away. I have been logging my battery voltage with the durametric and with a DVM in the cig lighter. When this error happens it seems like the alternator is not charging ( 11.2-11.5VDC) When the warning goes away, my voltage goes to 14.2-14.5VDC and stays there constantly. Upon loads, i.e headlights, radio brake lights etc it drops to 13.8-13.9VDC. This is telling me that my alternator is working and charging the battery. I did some resistance checks around the v+ battery terminals and cleaned up what was though as a "higher resistance" on the + cable of about 1 ohm. I cleaned the contacts and put star washers on every screw terminal which fixed this issue. While the battery cable was out, I measured paresitic current draw with the car in "rest/sleep" mode and i only drew 100-150 mA. One thing i notice is when the car is sitting, in rest. I do hear things under the hood along with my radio cd mechanisim every once in a while move. I know for a fact i am not drawing this current but it will settle down and go quite which will then draw 100-150mA Sorry for the long winded start of a thread, I am slowly giving up on what could be a matter with this truck and am hoping any of you could point me in a right direction on this issue. Thanks