valet 712t horn

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=96274
Printed Date: May 09, 2025 at 6:30 PM

Topic: valet 712t horn

Posted By: coollerpad
Subject: valet 712t horn
Date Posted: August 09, 2007 at 3:13 AM

I had Valet 712t installed on 2001 Toyota Corolla... but did not connected the horn wire... i'like to connect it to the Chirper/Siren instead... there is one red and one black wire from the chirper... how to connect it... Please Help!

Replies:

Posted By: frans-c
Date Posted: August 09, 2007 at 6:08 AM

I just installed my Valet 712T this morning! Also connected my car's horn. Here's how you should connect your siren using a regular SPDT relay, assuming it activates by switching to ground:

#85 & #87   Fused 12V
#86        Brown input wire from 712T module
#87a        Ground
#30        To siren's live wire

If your siren activates by switching to 12V, use the following relay setup:

#85 & #87   Fused 12V
#86        Brown input wire from 712T module
#87a        Not used
#30        To siren's live wire

Hope it helps!

-------------
F R A N S
1985 Mercedes-Benz 230E
320 000 km / 199 000 miles
Full MB Service History

Posted By: coollerpad
Date Posted: August 09, 2007 at 9:13 AM

So... the...

#87a connect to BLACK from the chirper
#30 connect to RED from the chirper ?

Posted By: JWorm
Date Posted: August 09, 2007 at 9:37 AM

I'm too lazy to download a manual for the 712t, so I am going to assume the 'horn' output wire is a (-) signal.

Black from 'chirper' to ground.
Red from 'chirper' to 30 on a relay.
86 and 87 of relay to a 5 amp fused constant 12v.
85 of relay to (-) horn output of 712t.

Posted By: coollerpad
Date Posted: August 09, 2007 at 11:04 AM

Thanks frans-c... and ... JWorm very much for the info! Will see if can get it to work.