dwiens87 Posted May 29, 2008 Share Posted May 29, 2008 I have a 05 OBW LLBean with 52400 miles on it. My escort radar detector told me that the voltage was low and then bam, wouldnt start. I let it sit for an hour or so and then it started. However, from then on the voltage meter on the radar detector has been jumpin from 11V to 14V. Even when im driving around (either 10mph or 80mph...even 100mph:)) itll read that the voltage is 12V but then jump to 13V...14V...and stay they for awhile but then jump around. The dealership tested the battery and the alternator and saw that the battery failed. It was replaced with a brand new one ($100 after labor/parts). However, problem didnt stop, same thing. Then the alternator was replaced ($700). No good, problem still happening. The voltmeter that they used showed that my radar detector was only +/- 0.2V off. So its semi right. Anyone got any ideas? they want to keep it overnight next week to figure it out. They're all stumped. thanks Link to comment Share on other sites More sharing options...
rao Posted May 29, 2008 Share Posted May 29, 2008 I'd check for a bad main ground. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
SeattleLegacy Posted May 29, 2008 Share Posted May 29, 2008 where do you live? if its in the northeast or somewhere where they use a lot of salt on the roads, the ground straps from the engine to the body/frame could be corroded and may need to be replaced. Link to comment Share on other sites More sharing options...
ebpda9 Posted May 30, 2008 Share Posted May 30, 2008 I'd check for a bad main ground. i would bet money on a bad loose ground too Link to comment Share on other sites More sharing options...
dwiens87 Posted May 30, 2008 Author Share Posted May 30, 2008 The car has been in Eastern PA its whole life. I knew you guys would figure this out! thanks. I'm going to go back to the dealership and ask them. You think they just installed that new battery and alternator for no reason? Link to comment Share on other sites More sharing options...
Legacy_GT_Pilot Posted May 30, 2008 Share Posted May 30, 2008 Curious - Where do you find the main ground wire? Link to comment Share on other sites More sharing options...
SeattleLegacy Posted May 30, 2008 Share Posted May 30, 2008 it comes off the negative terminal on the battery. Follow it to where it attaches to the body/frame. The wire itself is no more than a few feet long, IIRC. Link to comment Share on other sites More sharing options...
dwiens87 Posted May 31, 2008 Author Share Posted May 31, 2008 Im noticing with the new alternator installed for a few days the voltage doesnt go as crazy as it did. It still jumps around but not as frequent. Hmm Link to comment Share on other sites More sharing options...
Ur Done SRH Posted June 1, 2008 Share Posted June 1, 2008 I agree... bad ground. Especially since the battery and alternator have already been replaced. Check all the ground cables. Link to comment Share on other sites More sharing options...
dwiens87 Posted June 25, 2008 Author Share Posted June 25, 2008 Ground cables are in working order...and it still does it. i even drove it out west but its still doin it out here... Link to comment Share on other sites More sharing options...
iyalla Posted June 26, 2008 Share Posted June 26, 2008 I'm just guessing here so bare with me... I think something is shorting out. Have you tried switching things off one by one to see if one of them causes the problem? Like for example start with every accessory on then switching them off one by one until the voltage goes steady. Another guess is that the AWD system (the electronically-controlled hydraulic transfer clutch) is causing a feedback. So when you accelerate its transferring power to the rear and its doing this constantly so maybe that explains the spikes. Maybe a connector is loose? Again just guessing Link to comment Share on other sites More sharing options...
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