this has happened twice now. driving and the check gauges light come on in my 2001, battery gauge is down to zero but truck stll runs fine. shut off and re start and it goes back to where it should be, only code is a p1682 batterys are new, what should i look for?

 

A bad connection at the PDC on the left front fender

used to get that symptom, without the code, on my 01. Found a loose connection on the main power into the PDC

 

i have the code on the odometer but nothing shows up on my scanner.. so you are talking about the front drivers fender? do i have to pull the box off or can i see it without taking it off

 

yes, it is on the left inner fender, behind the battery, and no, you shouldn't have to take anything off to see the main connections that were loose on mine. I am not saying for sure that this is the issue, it was on mine though

 

any other suggestions? it is doing it all the time now. but my batterys arnt dieing? anyone have a idea? thanks

 

checked the batterys and they were only being charged at 11.10 so it was my alternator changed it and there at 14 now. I picked up a boush for 189 canadian

 

I am having exact same problem but batteries are being charged at 14.2volts which is what it should be. What is the PDC. Is this the main electrical box which has all of the fuses and relays inside? Mine will drop to 0 volts but the lights do not dim and if I shut the truck off and restart, the voltmeter will usually go right back where it should be. Any suggestions?

 

mine was doing that about once every 3months then it finally just stopped putting out enough. so i replaced it. how often does yours do this?

 

Mine has done it twice in the last 3 weeks. I just went out and cleaned all of the grounds and cleaned all battery terminals and tightened. Hoping that this cures the problem. I took it to the alternator shop that rebuilt it two years ago and they could not find any problems. I had one negative battery terminal that was loose enough that I could twist it off without loosening the clamp so I am hoping that was the problem.

 

Ken,

Is your truck repaired? Mine has suddenly started with the same symptons as yours. Check voltage warning, P1682 code, zero on voltmeter. BUT, truck will start up just fine with no dimming of lights and volts recover after start up (excpet when real cold outside).