question about turn signal switch wires

[duanel]

Every wiring diagram I have looked at only shows seven wires going to the turn signal switch, yet there is eight going to it. I know what the seven do but what is the eighth (black) for on my truck it is a constant hot (on not temp) and when disconnected doesn't seem to make a difference.

 

[Recon!]

Got a pic of what you're talking about? I think I may know, but I want to make sure we are talking about the same thing.

 

[duanel]

If you count the wires there are eight there this picture is from oreilly and is the turn signal switch for a 73-83 gm truck. the 8th wire is connected to the brass plunger thing circled

 

[1BEATK5]

Isnt that the hot wire for the horn?
i looked all over alldata (more like somedata) and couldnt find a pic of that harness at all.

 

[duanel]

could be I don't have a horn also have a gt steering wheel, but I thought the horn used a ground on the steering wheel.

 

[hunter29078]

I believe it does ground on the 3 srews on the rubber ring thing that holds the metal cup on. But does have a hot as well, will shock you pretty good too, if you go into the column and forget to unhook the battery. My vote is for horn wire as well.

 

[1BEATK5]

yep you are grounding a power wire to the steering column. thats why you would have a power wire to it.
there is a piece that either doesn't come with a gt wheel or is easily lost that that is needed to make the horn work on those wheels. i dont have a horn on my gt for that reason. but i know you can get it seperate
pop the center cap out of the wheel and see if there is a wire atached to the horn button