69 horn relay, and other relay questions. - Chevelle Tech
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post #1 of 15 (permalink) Old Apr 22nd, 14, 9:15 AM Thread Starter
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Dennis
 
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69 horn relay, and other relay questions.

Hello all,

I had a few questions I was hoping you could help me with. While I am waiting on my motor to get back, I thought I would dive into the engine compartment electrical.

I am replacing a lot of old stuff with new, and I would like your opinion. first of all, I am putting a 1 wire powermaster alternator in. I know, MAD says 3 is better, but this came with my serpentine system, so I am going to use it. I am wanting to wire everything according to the MAD New system.

http://madelectrical.com/electricalt...evymain2.shtml

I am going to replace the horn relay, but can I just use any bosch style relay ? For some reason, I don't think so.

I am also, planning on running relays for the low and high headlights, electical fans, and at some point A/C

This relay: http://www.opgi.com/chevelle/TRD1756/ seems to be pretty expensive to me, considering this relay:


can be had considerably cheaper.

There is an amazing lack of details when it comes to Horn relays. Amps, type and whatnot. Is it SDST ? is it DDST? Is it SDDT ?

I am SURE I am missing details, which is why I am here. Any help would be greatly appreciated.


EDIT: Not sure if it matters, but I am using a MSD AL 6 ignition system.
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post #2 of 15 (permalink) Old Apr 22nd, 14, 10:56 AM
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Vince
 
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Re: 69 horn relay, and other relay questions.

which wiring method are going to try from the link??
it said clearly in the instructions :
(A THREE-WIRE alternator is required, the “ONE-WIRE will not work.)

do you have the battery up front or relocated to ??

why are you thinking about replacing your stock horn relay with something else???

you need to plan the upgrades for proper function later [no melted wires or fires]
do you have a stock or aftermarket wiring harness?
more info is needed to reply in a helpful manner to your questions

how big of 1-wire alt do you have??

68-Malibu 427bbc/t4oo/3.73-12bolt/pro charger f1-r
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post #3 of 15 (permalink) Old Apr 22nd, 14, 11:03 AM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by VinceS427bb View Post
which wiring method are going to try from the link??
it said clearly in the instructions :
(A THREE-WIRE alternator is required, the “ONE-WIRE will not work.)

do you have the battery up front or relocated to ??

why are you thinking about replacing your stock horn relay with something else???

you need to plan the upgrades for proper function later [no melted wires or fires]
do you have a stock or aftermarket wiring harness?
more info is needed to reply in a helpful manner to your questions

Thanks for the reply,

I am planning on attempting the "New System" Method 3.

I would like to replace the horn relay mainly because at this point its over 40 years old, and NOT 100% sure it's working correctly. (have had other wiring "oddities"). A horn that only works for a brief moment, and is really weak. Plus while I have the motor out, why not ? I am trying to clean it all up.

I have a stock wiring harness right now. Would like to use an aftermarket setup later. I WOULD put an aftermarket in now, but I am not in a position to rewire the whole car, the Painless and AAW do not connect to stock block in the car. Therefore I would have to upgrade everything at once (I think).


EDIT: Battery up front.
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post #4 of 15 (permalink) Old Apr 22nd, 14, 12:04 PM
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Joe
 
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Re: 69 horn relay, and other relay questions.

69 horn relay is a horn relay, key buzzer, and power distribution point for the rest of the car. It's not just a relay.

-Joe
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post #5 of 15 (permalink) Old Apr 22nd, 14, 12:09 PM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by joeyv69ragtop View Post
69 horn relay is a horn relay, key buzzer, and power distribution point for the rest of the car. It's not just a relay.
That explains the difference in price. Thank you.
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post #6 of 15 (permalink) Old Apr 22nd, 14, 2:17 PM
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Joe
 
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Re: 69 horn relay, and other relay questions.

Study the wiring diagram. as long as you're changing things up you can prob get away with a regular relay for the horns and come up with some other solution for the buzzer (if you want one) and also come up with a way to replicate or eliminate the bus bar that is part of the relay. My horn relay is long gone. Someone else needed it while my chevelle was in storage and made no bones about taking it, along with many other 69-only parts. I got it running by splicing the two large red wires that used to be attached to the horn relay but I only ran it like that once. When the car gets put back together it will not have an OEM style horn relay.

-Joe
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post #7 of 15 (permalink) Old Apr 22nd, 14, 2:22 PM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by joeyv69ragtop View Post
Study the wiring diagram. as long as you're changing things up you can prob get away with a regular relay for the horns and come up with some other solution for the buzzer (if you want one) and also come up with a way to replicate or eliminate the bus bar that is part of the relay. My horn relay is long gone. Someone else needed it while my chevelle was in storage and made no bones about taking it, along with many other 69-only parts. I got it running by splicing the two large red wires that used to be attached to the horn relay but I only ran it like that once. When the car gets put back together it will not have an OEM style horn relay.
Good idea! From what I have read, for the most part, the bus bar is just a spot for a bunch of other wires to "jump off" from. If that is the case, I don't see why something else wouldn't suffice in that spot.

Again, I am just trying to "get done" with the engine compartment to the point where I don't have to wire anything later on down the road.

I will do some more research, thanks again for the info!
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post #8 of 15 (permalink) Old Apr 22nd, 14, 2:37 PM
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Joe
 
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Re: 69 horn relay, and other relay questions.

Good luck Dennis. Post up some picks when it's done!

-Joe
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'69 Malibu Convertible
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post #9 of 15 (permalink) Old Apr 22nd, 14, 2:42 PM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by joeyv69ragtop View Post
Good luck Dennis. Post up some picks when it's done!
Will for sure...I have about 3 weeks until motor comes back, so I have time!
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post #10 of 15 (permalink) Old Apr 23rd, 14, 4:42 AM
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Nick
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by joeyv69ragtop View Post
69 horn relay is a horn relay, key buzzer, and power distribution point for the rest of the car. It's not just a relay.
Thats right.You say the horn only works for a brief moment and is weak,that can be bad horns.
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post #11 of 15 (permalink) Old Apr 23rd, 14, 7:46 PM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Hello again fellas, just looking around, would this work for a replacement ?
any reason not to buy this ?


http://www.ebay.com/itm/Horn-Relay-S...83dbd2&vxp=mtr
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post #12 of 15 (permalink) Old May 1st, 14, 7:52 AM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by nsnarsk View Post
Thats right.You say the horn only works for a brief moment and is weak,that can be bad horns.
This is very possible. The other odd part, that points me to the horn relay, is the key buzzer kinda squeals. For lack of a better term, it is not a constant tone. I did buy a wells relay, and I am going to try that out. I have been looking into all kinds of wiring info and will hopefully incorporate a new modern twist on the this cars wiring.

Thanks again for all the help.
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post #13 of 15 (permalink) Old May 1st, 14, 9:34 AM
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Joe
 
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Re: 69 horn relay, and other relay questions.

There;s another member steve, he has vroom is his username. He did up a nice system in his elcamino using a power distribution box from a ford taurus. If you do a search you might find a link to his page. it's pretty cool and low-buck when you can score the power box with all the relays and fuses pretty cheap at a junkyard.

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post #14 of 15 (permalink) Old May 1st, 14, 9:44 AM
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Re: 69 horn relay, and other relay questions.

here it is

http://home.surewest.net/jahr/ElCami...lectrical.html

-Joe
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post #15 of 15 (permalink) Old May 2nd, 14, 5:57 AM Thread Starter
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Dennis
 
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Re: 69 horn relay, and other relay questions.

Quote:
Originally Posted by joeyv69ragtop View Post
Thank you!
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