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new wiring harness

  • Thread starter Deleted member 21878
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Deleted member 21878

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i have started putting in the new wiring harness. a couple of questions to start:

at the fuse block:
the diagram shows three white wires going to A3. 1) the overdrive relay; 2) the fuel pump; 3) the coil
i have another white wire coming out of the main harness which has continuity to the white wires inside the car.... guessing at this point is the switch since it is a little heavier wire. should that go on the same A3 terminal?

flasher relay:
my cover was off the flasher relay. not sure why. it may have had an issue or it may have just been knocked off. is there a way i can test this unit to make sure it works before i go on?

Thanks
 
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here is a picture of what i am talking about.
the white wire to the bottom goes to the OD relay, the one bent in a "U" goes to the fuel pump, the one bent in a loop goes to the coil.

the other white appears to go to wiring inside the bulkhead. i would assume they all get connected to the same terminal on the fuse block but just wanted to check since the wiring diagram does not show the other white wire.

DSCN0206.jpg
 
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The brown wire is for the horns and it gets a 'dedicated' terminal with a 50-amp slow-blow fuse. All the rest go to the other terminal and get a 35-amp slow-blow.
 

RestoreThemAll

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Are you adding extra fuses? If not you may want to reconsider. Search the forum. There is plenty of discussion about that.
 
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i think i figured this one out. on the wiring diagram they show running a white wire out to the coil and then one back to the fuse block. instead of doing that, the harness makers just ran a wire to the fuse block. same result and less wire. makes sense now.

as for adding more fuses, i am going to look in to that as i figure out how the harness is run under the dash. then see what i can come up with. certainly looks like a few in-line fuses are in order at the very least.
 

Rob Glasgow

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Ditto to Mike Tobin's recommendation of Charlie Hart's fuse block. It's well built, the instructions are spot on and it looks right at home on the car. Plus you've got all the circuits individually protected.
 

RestoreThemAll

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I was also going to suggest Charlie Hart's setup. The one pic is Charlie's setup, more fuses. The other is a schematic that my brother the EE made for me.

I put an in line fuse at the fuel pump and OD switch.
 

Attachments

  • HLY FUSEBLOCK BN1-BJ7 wiring.pdf
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  • DRAFT Austin-Healey Harness v0 2 with color labels.pdf
    117.7 KB · Views: 110

RAC68

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Although Charlie Hart's setup is a very good idea to help protect the circuitry and components, I would suggest you consider placing it in a convenient place under the dash and retain the original box to maintain the image of originality. Since you are at a stage in your project to be able to address this much easier then after the completion of your restoration, the implementation of Charlie's box would only require a few hidden wires for the move.

Although my restoration was completed before considering the implementation of a number of additional fuses covering all main circuits, I found it easier to add fuse holders to each of the circuits I wanted to cover. This approach gave me the benefit of being able to focus each fuse on the specific demands of the targeted circuit and/or component with no additional wiring required to get to the specific circuit from a central location. It also allowed me to hide each fuse holder to maintain the original wiring image. However, because of the distribution of protected circuits and the deterioration of my memory with age, I created a directory of protected circuits/components, the location of the fuse, and the size of the fuse. This directory also contained any notes thought advantageous to know for fast access of the fuse and anything helpful or unique that would help quick access and remediation of a related issue.

Just some additional thoughts,
Ray(64BJ8P1)
 
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Thanks for the info. i would like to keep the original look as close as i can. not that this car is exactly correct but i would like it to look close. printed out both files above and will look in to this.
 
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i am looking over the Hart set up of the fuse block. they show a white wire to the overdrive switch on the left side of the bar along with the white wire from the switch. then they show the wire to the OD relay on the right as well as the fuel pump.
they do not show the white wire to the coil. was wondering since the white wire to the OD switch comes off the C2 terminal of the relay.... should they really mean the coil wire and not the OD switch?

Thanks
 

Keoke

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i have started putting in the new wiring harness. a couple of questions to start:,Whose harness did you BUY!_????
 
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So far mine has been perfect also. i did start pulling my wires for my fuse sub-block. i bought one off of Amazon. should be here Wed. i got an 8 terminal block so i have room for a driving light circuit and have one more just in case. i plan to lay it out just like the Hart set up above.

in stead of pulling out my old fuse block, i am leaving it in. on the left side of the 35amp fuse will be my hot wire from my switch and the wire to the coil. on the right side of that fuse, i ran one green wire headed to the power supply block on the new fuse block. then extended all 5 green wires, the fuel pump wire and the OD relay wire inside. I also ran one red wire from the front of the car for the fog/driving lights. this will go to a switch (not sure where just yet) and then to the fuse block. pic below

on the driving lights, i was considering getting another wiper switch and hopefully a plain knob to put in the dash. Not sure where. looking for ideas on where to install the switch.IMG_0209.jpg
 
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