rear fog lights = battery dead?

Your mechanic is full of it, if the rear fog lamp drained the battery, then something is wrong with the electrical system. If the fog lamp was not on with the car off, your problem is unrelated.

Personally I would look for a more competent mechanic.

No !! it is time to find a new mechanic who knows what he or her is doing Glenn K Volvo Certified Technician ASE Certified Technician

I used my fog bulb to do the same and no issues, the only way it could drain power is a short on the circuit, so ask him how he detected the short and how bad it is, or the sign says heesamoron.

Thanks everyone for your feedback,looks like it's time to find a new mechanic ;)

snort, the guy at the local firestone told me the battery he sold me died within 11 months because i had a cb radio plugged in to the cigarette lighter. (which was off when the key was off, in case there's any doubt) After i got the new battery on warranty i didn't go back there again, obviously.

i'm ceertain it's not the case here, but, technically, in a stupidly designed vehicle, that is possible; if the fog light switch were connected to a relay which is always hot but the lights themselves are connected via the ignition switch (and the relay).

for example: i got the idea for this possibility from the local newspaper car advice column; somebody's pickup truck (detroit, don't remember the make) had intermittent battery dying overnight; turned out to be that he had bought the snowplow package, but not sprung for the auxiliary lights that were optional with the package. well, even if you didn't buy the lights, the package's standard wiring harness came with the relay which was connected to the dash switch which was always hot; so if the switch was on and the ignition was off, the battery was draining through the relay and you had no way to know it.

Your mechanic may have thought the fog lights were a home-wiring job that are on all the time. You need another mechanic. I would have the battery and connections checked. Next concentrate on the charging system.

i copy NASCAR and just paint the headlights on the front of the car. no chance of them burning out the battery that way.