Overnight my battery runs low, too low to start my car the next morning, unless I start the car in the middle of the night to recharge the battery.
Q. Is there any device I can use, or anywhere I can take the car to have it diagnosed to find out "exactly" what is draining my battery?
The same thing happens if I listen to the radio (have an amp) without the car running.
I have an 1989 Buick LeSabre T-Type which I installed the L67 & 4T65-E from a 1997 SSEi. However, I had this problem prior to the engine swap.
I checked fuses, and none were blown, there are no coins under the seats shorting the electical seats out, or anything like that.
Any suggestions are appreciated.
Thanks in advance,