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Mustang Technical Discussion > Mustang Projects > Edz 66 Convertible > Community Forums > Mustang Forum Australia - Mustang Tech

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nassi
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Sorry Ed, crossing diagrams pisses me off big time. I did try but the beer has fogged my glasses. I will look again tomorrow with a clearer head. Honestly I am not sure which way you are numbering the connector.


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Edz66Vert
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No worries Nassi.

I was numbering by standing at the front of the car and looking at the plug on the firewall.

So 1 and 5 are the females on the harness coming out, the rest are males.


66 Convertible 351W; AOD; 9"

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Edz66Vert
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I think I've worked it out.

When the ignition or accessories is on, power comes out of the heater fuse through the brown wire, out of the plug to the heater motor. The PO has taken power from this wire on the firewall side to power the reverse lights.

However, above this plug on the firewall is a 4 wire harness that is meant to connect to the Neutral Safety Switch and Reverse Lights as Nuts pointed out. 2 wires (both Red/Blue) are connected to the Neutral lockout, a 3rd wire (Black/Red) turns on the reverse lights when you add power, however there is a plain black wire that did nothing. When I jumped across the top fuse, the black wire turned the test light on. Wiggled the fuse and it worked, seems the rust in there was stopping the connection.

One more piece of the puzzle sorted (I hope)!


66 Convertible 351W; AOD; 9"

Last edited by Edz66Vert on Mon Feb 05, 2018 5:15 pm; edited 2 times in total

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Edz66Vert
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Ausjacko wrote
Ah, PO wiring, always interesting. I liked how PO4 connected the radio power not to the existing radio circuit but via the high beam foot switch- noice.

That would've been great, you only had the radio on with high beam! Some people should stay well away from working on cars!


66 Convertible 351W; AOD; 9"

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Edz66Vert
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Down to the last bit of wiring drama (I think)!

I cut the choke wire off with the intention of rerouting it and have lost where it attaches to the harness? The reading I did on the Holley site suggested it needs a 10 amp ignition source.

I don't want to use the black wire I was just talking about as then the choke would be on with accessories all the time as well. I also don't think it's a good idea to use the ignition coil wire?

Any ideas or tips which wire it was?


66 Convertible 351W; AOD; 9"

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Nuts
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Pretty sure its the ignition wire Ed. It's the only way the choke can get power from that connector.


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Ausjacko
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on the 68, my choke power is via a red wire if that helps.


'68 J-code GT Fastback
'67 S-code GT coupe, 'Pink Bitz' formerly known as 'Hookin' up a brother'
'69 M_____ GTS Fastback 'Blasted'

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Edz66Vert
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Thanks guys, I'll check tomorrow arvo. I think the coil was red so I'll go with that, at least then I know it's only on with the ignition.

Friday I'm off all day so now that I have all the wiring chased and working I'm cutting off the rusty fuse holder and replacing it with a new blade holder. I didn't want to do that until I knew everything worked like it was before (including the washer which is a crook switch and the heater which is rotted wiring at the motor which explains why the PO left the fuse out there).


66 Convertible 351W; AOD; 9"

Last edited by Edz66Vert on Mon Feb 05, 2018 9:59 pm; edited 3 times in total

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Edz66Vert
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Nuts wrote
Pretty sure its the ignition wire Ed. It's the only way the choke can get power from that connector.


BTW Daryl, I measured the coil voltage with a bulb when on and it had the same voltage in the On and Start positions so I assume someone has already bypassed or removed the resistor wire behind the dash. I'll remove the old MSD coil that needs a resistor and swap it for the MSD Blaster 3 I have.


66 Convertible 351W; AOD; 9"

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Edz66Vert
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Ausjacko wrote
on the 68, my choke power is via a red wire if that helps.

Thanks Ausjacko, my choke wire is also red so I connected it to the coil wire at the firewall which is red-green. Should work fine. Thanks all for help.

Any ideas on what wire 3 (red with bluish stripe) does/goes to in the centre plug, 3rd one along in the top row when you are standing at the front of the car looking at the plug?


66 Convertible 351W; AOD; 9"

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Nuts
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Ed the only red/blue wires on the 65/68 are starter solenoid. Have a look from under the dash maybe someone changed the wire doing a bit more electrickery!!


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nassi
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Yep, only red/blue is the park neutral switch safety switch.


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Edz66Vert
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I'll trace it back tomorrow, and report what i find. Thanks for the help.

Good news is I chopped out the horrible old rusty glass fuse holder and fitted a new blade holder.


66 Convertible 351W; AOD; 9"

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Edz66Vert
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Both correct, park neutral switch safety switch.

Today I finished wiring the new fuse box, then spent the rest of the day trying to slow the wiper motor down. To get engineered under VSB14 (NS and ACT) you have to have two speed wipers. These were an option which my car did not have. I priced a 2nd hand 2 speed motor (they don't make new ones), wiring harness and switch and it came to $450 delivered so I thought I'd see what I could come up with.

I tried a large resistor from Jaycar and one I had for LED motorbike indicators, but neither of these would work. I looked at kits at Jaycar and wiring circuits on line but nothing came up that would handle more than 0.5 amp let alone the 3-5 amps the wiper might see. Then I had a brainwave, I remembered using a light bulb in a circuit once to slow a motor down. I grabbed a 60W headlight bulb, chucked it in between the power and wiper switch and bingo, it slowed to about 2/3 speed.

So now I have the power feed coming in to a two way switch in my temporary centre console, power to centre, top out gives low speed (with the bulb wired in) bottom out gives high (normal) speed. Works a treat, the bulb only glows gently and doesn't get hot at all.


66 Convertible 351W; AOD; 9"

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Nuts
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Nice one Ed. What ever gets you over the line is good!


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