Turn signals and horn didn't work. I replaced the turn signal switch and the turn signals now work but no horn. Also, I have hood turn signals, all new wiring, and can't get them to work either. Any advice appreciated.
Posts: 239
Joined: 2/16/2007 From: near Los Angeles Status: offline
Double check that the horn ground wires and the hood turn signal ground wires are indeed screwed in tighly. My hood indicators were always flaky because the ground wasn't tight and the connector to them from the main harness was filthy dirty when I first got the car. You might have to trace the horn wire all the way out to them if the ground is already okay.
Beyond those things, I'm not sure what else to look at.
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My complete stable: '66 Corvette vert (427/425), '68 Mustang fastback (347), '68 Mustang vert (302), '69 Corvette (427/390), '00 Prowler, '03 Viper, '08 Saturn Sky Red Line
when you press the horn button do you hear a small noise coming from the horn? and press the button while the lights are on to see if they dim.. if the lights dim then your switch is good, the next thing i would check is to see if your horn acctually works... run a pair of wires to the battery terminals to see if it works like that, then take a meter to see if you getting enough juice to the horn wires up front. and finally sand down the mounting area for the horn braket on the radiator support down to bare metal to help it ground better. good luck.
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68 Horn doesn't work - 
