HELP!!! electrical short

[1979ratrod]

ok so a few months back i put in a new tach and a used radio. i hooked the tach up and also the radio up but the radio was hooked up wrong. so when i turned on my headlights the dimmer switch fried. a month ago i put in a new radio aand hooked it up right. so today i put in a new dimmer switch and my dash lights still wont come on. same problem as the last blown dimmer switch but i know this one isnt fried. i cant seem to find any shorts or bad grounds. anyone know what could be wrong? and also the tach was hooked up right

 

[osantisbon]

ok so a few months back i put in a new tach and a used radio. i hooked the tach up and also the radio up but the radio was hooked up wrong. so when i turned on my headlights the dimmer switch fried. a month ago i put in a new radio aand hooked it up right. so today i put in a new dimmer switch and my dash lights still wont come on. same problem as the last blown dimmer switch but i know this one isnt fried. i cant seem to find any shorts or bad grounds. anyone know what could be wrong? and also the tach was hooked up right

Do you have the schemes electric?

 

[pontiacgp]

did you check the fuse?

 

[454cutlass]

you could have melted the wire.....trace the wire its probably going to be pita

 

[pontiacgp]

It's just a 5 amp fuse for the dash lites so I don't think the wire would fry