bench testing a horn relay - Chevelle Tech
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post #1 of 5 (permalink) Old Dec 29th, 06, 12:43 AM Thread Starter
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bench testing a horn relay

Tired doing a search, but the pictures that were in the previous posts were gone. I have 2 horn relays, one original and one from my parts car (both 70's). I wanted to bench test the horn relay for function before I bolted it in and dressed the wires up. I understand that I will need to ground it, then supply 12V to one of the leads to pull the coil in. That should make the contact(s) for the the horn, so I should get 12V on the output of the horn spade. I'm just not sure which connectors are what on the bottom (3 I think)I would also like to test the buzzer. How would I go about this? Thanks for the help.

Chad Sauvage

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post #2 of 5 (permalink) Old Dec 29th, 06, 2:34 AM
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Re: bench testing a horn relay

This help


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post #3 of 5 (permalink) Old Dec 29th, 06, 9:23 AM
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Re: bench testing a horn relay

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Originally Posted by 7DSS View Post
.............I understand that I will need to ground it.............
I don't think it's necessary to ground the relay itself.
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post #4 of 5 (permalink) Old Dec 29th, 06, 6:57 PM Thread Starter
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Re: bench testing a horn relay

Yes. Thanks! I'm assuming then that the busbar supplies 12V to the horn relay? For some reason, I thought it was just an "external" busbar for battery/vehicle supply junction. If it supplies 12V to the relay, It should be able to ground the black and make sure the green gets 12V. Then I should be able to ground the pink terminal and hear a buzz?? Does this sound right?

Chad Sauvage

'70 SS396- 402/4sp- Restoration is progress
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post #5 of 5 (permalink) Old Dec 29th, 06, 10:06 PM
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Re: bench testing a horn relay

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Originally Posted by 7DSS View Post
............ Does this sound right?
Yep, you got it.
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