The 1947 - Present Chevrolet & GMC Truck Message Board Network

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- - 1966 Horn Relay picture (https://67-72chevytrucks.com/vboard/showthread.php?t=649925)

1966 Horn Relay picture

Can someone post a picture of a horn relay with wire harness or connection? I have 1966 GMC Suburban that did not have horn relay when I got it. I bought one at CarQuest and it has three tabs, no bus bar. I'm trying to determine which wire goes to which post. Thank you.

Re: 1966 Horn Relay picture

Thank you x1Buellist. That has a busbar. The one I have looks like this.

Re: 1966 Horn Relay picture

That 3-terminal horn relay without the bussbar looks like the style that was used on Chevy trucks from 60-62. That same type was also used in 67-72 GM trucks but located under the dash instead of on the radiator support.

The bussbar wasn't needed on 60-62 because they joined the wires together at the BAT terminal on the generator voltage regulator instead. And 67-72 eliminated the need for the bussbar by joining the wires together in a factory splice inside the wiring harness. I don't have any 60-66 GMC specific wiring diagrams to know for sure, but I'm guessing they did something similar.

Anyway, with the relay oriented as shown in your pic:

Wire from horn button connects to the upper terminal closest to the radiator support.
Wire to the horn connects to the upper terminal out away from the radiator support.
Wire from battery + connects to the lower terminal.

Re: 1966 Horn Relay picture

Thanks a lot Ray. I'll continue with the wiring this weekend when I get home. Much appreciated.