Cigar lighter is ruining anything I plug into it

[uhhair]

So I recently took apart my interior to install a new head unit. Now that I have put it back together, something is very wrong with the cigar lighter. Everything I plug inside it is seems to get ruined immediately. I've ruined 3 chargers so far trying to figure out what is going on. Does this mean I have the wires backwards on the bottom where they plug in? Or could it be something else going on?

[Bitsyncmaster]

You must have swapped the wires or your alternator is over voltage charging? Do you have a voltmeter? check the voltage center pin of the lighter to the metal wall of the lighter. Center pin should be +12 and wall should be ground.

[uhhair]

Sounds good, i will check it out! I'm sure I just put them on backwards, I would think if my alternator is outputting too much voltage I'd have some other issues going on as well, no?

[Rich_NYS]

I accidentally had mine backwards & fried a FC USB charger..."blew the chip right off the board in there."

[DavidProehl]

+1 on the wires being swapped. I distroyed an FM transmitter that way. I'm very careful now to confirm the wire locations!