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Horn Relay on a 1972 Vette

Old 12-04-2018, 08:39 PM
  #41  
mitch.1972vette
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That may work. I have my MSD mounted in the lower section and it may make sense to run the harness along that side, as you suggest. I could also make it work with Richard's headlight kit (I now have to install it). Here is a pic of the MSD:


This is it mounted:

I do believe the passenger side would be better. Thanks.
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Old 01-09-2019, 02:16 PM
  #42  
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This is a new diagram of the fuse block/circuit breakers for my wiring project. I have only just begun and don't want to get too far without a little direction or correction. Please feel free to help me with wire gauges that would make the wiring safe. All the same accessories on my previous diagram need to be added to this one. Thanks for all your help.
Dub, please feel free to grab this and mark it up for me (This is more detail - I'm still going to use my previous drawing but haven't changed any wire color yet - or wire gauge)

Last edited by mitch.1972vette; 01-09-2019 at 05:21 PM.
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Old 01-09-2019, 06:35 PM
  #43  
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This is the diagram:
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Old 01-10-2019, 04:42 PM
  #44  
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Instead of using fuses for your headlamps you should use something like this:



Thats what I used (20 amp not 30) when I installed headlight relays.
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Old 01-10-2019, 07:11 PM
  #45  
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"theandies"

If you carefully look at his wiring diagram he IS running circuit breaker for the power to the relays that actually will go make the headlights shine. . He is using fuses to protect the 12 volts that is going to the coil IN the relay just like GM does.

Mitch,
Call me when you can.

DUB

Last edited by DUB; 01-10-2019 at 07:11 PM.
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Old 01-11-2019, 12:05 AM
  #46  
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Hey Mitch-

Nice drawing!

The only thing I see right off the bat- I'd go with a MUCH larger gauge wire from the starter to the battery.

Where are you mounting the Circuit breakers?

Did you get the headlight motors in yet?

Richard
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Old 01-11-2019, 01:43 PM
  #47  
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Originally Posted by DUB View Post
"theandies"

If you carefully look at his wiring diagram he IS running circuit breaker for the power to the relays that actually will go make the headlights shine. . He is using fuses to protect the 12 volts that is going to the coil IN the relay just like GM does.

Mitch,
Call me when you can.

DUB
He's posted so many revisions I must have missed that. I just worry about people that convert their headlights to relays then use fuses to protect them instead of circuit breakers. That would make for a bad night in a decreasing radius turn at speed.
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Old 01-11-2019, 07:07 PM
  #48  
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Originally Posted by Richard454 View Post
Hey Mitch-

Nice drawing!

The only thing I see right off the bat- I'd go with a MUCH larger gauge wire from the starter to the battery.

Where are you mounting the Circuit breakers?

Did you get the headlight motors in yet?

Richard
I would have to agree. 6 gauge is too small in my opinion.

Originally Posted by theandies View Post
He's posted so many revisions I must have missed that. I just worry about people that convert their headlights to relays then use fuses to protect them instead of circuit breakers. That would make for a bad night in a decreasing radius turn at speed.
I agree...but even with circuit breakers if you have an electrical issue that causes the circuit breaker(s) to pop....you still would be with otu headlights in the turn at night.

No matter what we do when wiring up things...there is no way to plan for a worst case scenario and come of it unscathed. If a protection device fails (fusible link, circuit breaker or fuse) it did what it was supposed to do and that is to protect the wiring. Unless a person wires in back up redundant wires and switches for this possible scenario which may never happen. That is when having a safety kit in your car with road flares or reflective markers so those coming up onto your car at night will see it and not plow in the back of it.

​​​​​​​DUB
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Old Today, 02:03 AM
  #49  
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Originally Posted by Richard454 View Post
Hey Mitch-

Nice drawing!

The only thing I see right off the bat- I'd go with a MUCH larger gauge wire from the starter to the battery.

Where are you mounting the Circuit breakers?

Did you get the headlight motors in yet?

Richard
Thanks, Richard. I plan to mount the panel on the passenger side upper fender well area. I will be deleting the vacuum lines to the front of the car, thanks to your headlight kit, and it should allow the needed room. I'm going to create my own box with a cover to facilitate the fuses and breakers. I will be installing your kit first in order to keep the new wire neat and tidy. I think I'm also going to use a front runner serpentine kit as well. I want to clean up the engine bay and move the A/C, alternator, and power steering up front to manage the header heat a little better. I could run the panel on the passenger side ~ but ~ that area may be needed for a power steering reservoir. I should probably purchase the serpentine kit (CVF Racing Wraptor Kit) before pulling the trigger on the placement of the panel and circuit breakers. Thanks for the advice on the wire gauge.


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Old Today, 02:07 AM
  #50  
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Originally Posted by DUB View Post
"theandies"

If you carefully look at his wiring diagram he IS running circuit breaker for the power to the relays that actually will go make the headlights shine. . He is using fuses to protect the 12 volts that is going to the coil IN the relay just like GM does.

Mitch,
Call me when you can.

DUB
Thanks, DUB, I will try to contact you tomorrow (Friday). I have worked some pretty long and crazy shifts. I look forward to speaking with you.
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