grad prank, brake to horn

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URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=127567
Printed Date: May 15, 2025 at 2:33 PM

Topic: grad prank, brake to horn

Posted By: maxpol
Subject: grad prank, brake to horn
Date Posted: June 06, 2011 at 7:56 PM

So we're pulling a grad prank on a friend, and it is the classic brake to horn prank :) I have some knowledge about electronics, but not sure how to approach this one.
So it's a 2005 Dodge Dakota, and I've got some wiring diagrams from here .

So if I use a relay, have the brake wire, WHITE/ lt. blue, go into 86, 30 to battery positive, 85 to ground and 87 to horn trigger (-) dk. GREEN/ purple, would that work? or is there an easier/quciker way of doing this?

Thanks!

Replies:

Posted By: the12volt
Date Posted: June 06, 2011 at 8:09 PM

12V+ output from brake switch to 85, ground to 86 and 30, 87 will provide a negative output to the horn switch wire.

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Posted By: maxpol
Date Posted: June 06, 2011 at 9:02 PM

Sweet, thanks for the fast reply. Another quick question, don't know if you'll have an answer but, is there another place aside from the cluster harness I can get the Horn (-) Trigger from like the ignition harness or somewhere that doesn't involve ripping apart half the truck ;)
Thanks!

Posted By: awdeclipse
Date Posted: June 07, 2011 at 7:48 AM

Horn switch wire should come down the steering column.

According to bulldog website:
HORN DARK GREEN/ PURPLE (-) @ HORN SWITCH

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