wiring help

[awesome_jay]

ok i need some help, i bought a new horn, installed it. when i press the horn on the steering wheel nothing happens, doesnt blow a fuse but doesnt work either. also i dont have headlights anymore, i have running lights but when i turn on the headlights or highbeams nothing happens, also dont have the light for the speedo anymore. i checked all the fuses in the under hood fuse box and in the under dash fuse box and none are blown. turning signals work though. i have checked the wiring in the under hood fuse box.

from what i understand the horn is a constant 12v ? i hooked up my multimeter in 12v battery test mode and touched the two wires for the horn and the multimeter read 0. shouldnt this read 12v?

i need help with what to look for? please

 

[knightxrider1]

did you check the "instrument light" fuse? bump for you

 

[awesome_jay]

ya i did, the lights for the battery/oil work on the dash, its just the high beam light and in the light for the gauges that doesnt come on

 

[awesome_jay]

the following works:
-dash lights for battery, oil, turn signals, seatbelt, parking break
-all other dash lights , heat, rear defroster.

doesnt work:
-headlights
-light on dash for highbeams
-highbeams
-horn
-gauge backlight

i've double checked all fuses. none are burnt