Cigarette lighter and dome light connected?

[Sprinkler-Man]

I just put in a after market cigarette lighter and when I plugged it in I heard a pop and now the lighter or dome lights don't work.  I checked all the fuses and none appeared to be blown.  Any ideas?

[bd]

Replace the blown horn fuse.

[Sprinkler-Man]

I will give that a try.  The aftermarket lighter came with a metal threaded shaft in the center of the rear of the lighter and a tab on the outer case.  The original lighter only had the the tab but it went to the center of the lighter.  When I attached the hot lead to the tab on the outer case this is when it blew.  Is this some sort of ground spot?

[bd]

The outer tab is the ground connection.  The center post is the hot connection.  By plugging up to the tab you grounded the battery wire and popped a fuse.  Look at it this way, now you know that fuses work.   

[bake74]

     A picture would be nice, but if I read that right, the outside casing for the cigarette lighter should be were it is grounded.  What brand of cigarette lighter did you buy ?  Rich beat me to it.

[Sprinkler-Man]

Not sure what brand but it was an aftermarket.  I modified a connector to hook up the lighter to the truck wiring and everything seems to be working fine.  The horn fuse was blown.  I missed it the first time.

[bake74]

     Glad to hear you got it fixed.