are these the dual horns?

[nitrosport_5]

just pulled these off of Rusty. were mounted together. with same bolt. i suspect they arent correct. of they arent correct, where should the second one mount? theae were both under the aux batt tray
Posted via Mobile Device

[nitrosport_5]

hit submit too early lol
Posted via Mobile Device

[71K20chevy]

Yes, those are correct, mine has the same ones.

I can't completely help you with mounting locations, but there should be bolt holes on the driver side of the core support, just like you described.

[nitrosport_5]

were they mounted one on top of another?
Posted via Mobile Device

[71K20chevy]

No, mine were mounted separately.

[longhorn70gmc]

Good thread,
My truck was spliced together from a prior owner, so Originally mine was mounted on both sides of the 1968 radiator support, but have since replaced it with a correct 1970 support and only had one horn wire, so now mine is mounted on the passenger side closest to the green wire. My truck is a 1970 GMC Longhorn Sierra Grande.
R/
Billy

[nitrosport_5]

my truck is so hacked together im surprised it even had horns on it. Although they dont seem to work. Is there any identifying markers on the horns that let you know they are for sure the correct ones? I am skeptical since the rest of the truck is so hacked up.

[Livrat]

I do not believe those are a dual horn "pair" the optional second horn should spiral the opposite direction, both normally had either an "H" or an "L" on the bell end indicating high or low note. one should mount next to the radiator on the core support and the other next to the headlight

[nitrosport_5]

thank you for clearing that up livrat. they dont have an h or l so most likely just 2 standard horns.
Posted via Mobile Device

[FirstOwner69]

Here are a couple pics. Installed and not. My high note horn (the one that goes under the headlight) is marked with the "H" visible in the second pic. The low note is not marked with a "L", but I understand some are. My original 69 core support did not have the weldnut mounting provision below the headlight on the front side, I assume, because the high note was not available in 69 (at least early 69). The low note horn is to the left of the radiator. The core support shown is from a 70, 71 or 72. The green wire you have looks to be correct to connect the 2 horns.

[Tbruz]

Any interest in selling the harness?
Ive been looking to add dual horns to my Blazer.
Thanks
Tbruz

[nitrosport_5]

Originally Posted by Tbruz

Any interest in selling the harness?
Ive been looking to add dual horns to my Blazer.
Thanks
Tbruz

I am going to hang onto it for the time being. If i end up getting a pair of dual horns with a harness i will look into selling it.