BillDurant

If I don't use the car for a week or 2 the battery is dead. I've seen in here that it's the alarm system ?
If so how can I disconnect that system ? what else would be affected if alarm was off ?
I don't ant a battery kill switch or anything like that. Or have to open hood and undo a terminal
Thanks

mickey5

How old is the battery? You might consider using a maintainer with a cigarette lighter plug in.

Nowhere Man

is it an aftermarket alarm?

rush0142

A Battery Tender is a great investment if you own a C4.....

Deepa

I went through dead batteries. Ended up being the ecm. Tested with my volt meter and found a draw outside of normal range, reman ecm and battery lasts way longer. About a month if unused. I do have a tender on for winter storage.

BillDurant

I have one

Cruisinfanatic

If your battery is dead in only 2 weeks, there is a problem. A maintainer does not fix it

~ Anno Domini

This happened to me before -- 1989 coupe. The battery would mysteriously drain after a day or two, and it was related to the motor for the power seats. Lift up your seat cusions and check if anything is hot under there. In my case, I don't know the name of the part, but it was super hot to touch. After unplugging it, it cooled down, and there was no more drain on the battery. HTH.

BillDurant

i have a tender. Need to solve the power drain

jackpine savage

Disconnect the negative battery terminal and connect a test light between the battery terminal and the negative cable. Go to the fuse panel and pull fuses until the light goes out. That indicates that circuit is drawing. That is not necessarily the culprit, as there is going to be at least one circuit for the clock and radio memory, for which the fuse should be removed first and set aside. Pull the rest of the fuses one by one and put them back in if the light doesn't go out. This will at least narrow it down as far as which circuits to look at. A failed alternator diode will also draw current and drain a battery overnight. If you don't have test equipment you can take it off and have it tested free at many parts stores. Your best friends in this ordeal are a VOM and factory service manual. Otherwise, you're shooting in the dark. The manuals are pricy but can save you a ton on repair costs. Most include a diagnostic tree giving step by step instructions for diagnosing problems. Don't bother with the Clymer or Haynes manuals. They are superficial and lack information like wiring diagrams, which are a must. You can get a VOM at Harbor Freight cheap, but I'd recommend a mid or higher priced one, as they are more accurate and will do more.

polo91

Several years ago, my C4 six speed convertible's battery was running down. It would take about a week. I checked everything with no luck. One dark night I just happen to walk by the car and noticed the taillights were very faintly glowing. Turned out to be a corroded plug in luggage area, right side near the rear bulkhead. Don't ask me how voltage was getting back there with everything turned off, I haven't a clue.

jazfe

My drain was from the cable that goes to the starter from the battery. It had been chaffing on one of the hold down clamps and shorting.