Wiring Harness journal

[Dleslie212]

I got a bit of the front wiring routed and sleeved this morning. Will be running the rear harness later today when it cools down a bit

 

[Dleslie212]

Got a little more done this morning. I found a good place to mount my ProFlo 4 ECU that will work good. Got a little more wiring routed. Need to extend the power and ground for the PF4 to reach the battery, and then tuck them in the looming.

Very slow going. Been having a hard time getting the motivation to work on it anymore

 

[Dleslie212]

A few more days, a tiny bit of progress. I've decided the way to go is to take care of one wire per day and it's helped with the feeling of being overwhelmed and not motivated. I got the Edelbrock fuel pump relay kit mounted and wired into the main harness and spliced to the Pro Flo 4 ECU wiring. Just need to run the larger orange wire through the firewall when I'm ready to wire up the selector switch. Today, I loomed and secured the o2 sensor wire, I think it turned out nicely. Tomorrow, will start on alternator/starter/battery cables, and then into the cab from there.

Also got my new Dakota Digital stuff ordered. The GPS module, CAN module for the
Pro Flo 4, and the gear display module all arrived but the dash itself doesn't have a ship date until end of October. I'm hoping that's not going to be the case but they seem to be hard to find.

I'm still trying to figure out exactly how the wiring for the dual tanks should work. I'm guessing it should all be installed exactly how the Painless manual calls for, with the exception of the power being supplied via the PF4 fuel pump relay power wire instead of the wire included in the Painless harness. Now that I think about it, the wire that's meant to supply power to the selector switch that was included in the Painless harness should be +12v during key on and cranking both, so that would be a good repurpose for thr PF4 ECU power-up wire. If anyone has thoughts or suggestions, I'd love to hear them.

Here are a few progress pics

 

[DoubleDingo]

A few more days, a tiny bit of progress. I've decided the way to go is to take care of one wire per day and it's helped with the feeling of being overwhelmed and not motivated. I got the Edelbrock fuel pump relay kit mounted and wired into the main harness and spliced to the Pro Flo 4 ECU wiring. Just need to run the larger orange wire through the firewall when I'm ready to wire up the selector switch. Today, I loomed and secured the o2 sensor wire, I think it turned out nicely. Tomorrow, will start on alternator/starter/battery cables, and then into the cab from there.

Also got my new Dakota Digital stuff ordered. The GPS module, CAN module for the
Pro Flo 4, and the gear display module all arrived but the dash itself doesn't have a ship date until end of October. I'm hoping that's not going to be the case but they seem to be hard to find.

I'm still trying to figure out exactly how the wiring for the dual tanks should work. I'm guessing it should all be installed exactly how the Painless manual calls for, with the exception of the power being supplied via the PF4 fuel pump relay power wire instead of the wire included in the Painless harness. Now that I think about it, the wire that's meant to supply power to the selector switch that was included in the Painless harness should be +12v during key on and cranking both, so that would be a good repurpose for thr PF4 ECU power-up wire. If anyone has thoughts or suggestions, I'd love to hear them.

Here are a few progress pics

Is that orange wire a ground wire? If not you need to grommet that thing. If it is I can't tell when looking on my phone. You don't want any power wires going through sheet metal without being protected

 

[Dleslie212]

Is that orange wire a ground wire? If not you need to grommet that thing. If it is I can't tell when looking on my phone. You don't want any power wires going through sheet metal without being protected

Thats actually the +12v supply coming from the fuel injection kit. I am using that instead of the Painless +12v because the Pro Flo 4 system had the capability to shut down the fuel pumps if RPMs go away, like in a rollover or something.

It'll need to pass through the firewall and connect to the tank selector switch. Thanks for the advice about the grommet, I appreciate that

 

[DoubleDingo]

Thats actually the +12v supply coming from the fuel injection kit. I am using that instead of the Painless +12v because the Pro Flo 4 system had the capability to shut down the fuel pumps if RPMs go away, like in a rollover or something.

It'll need to pass through the firewall and connect to the tank selector switch. Thanks for the advice about the grommet, I appreciate that

You're welcome. You don't want to do all this custom wiring without protecting the hots from grounding out to metal, as that never ends well. Negatives contacting metal won't cause a fire

 

[Dleslie212]

You're welcome. You don't want to do all this custom wiring without protecting the hots from grounding out to metal, as that never ends well. Negatives contacting metal won't cause a fire

For sure. The plan is to never have to mess with the wiring for the next 25 years. I want it to be done right and to last

 

[Juggernaut]

Are you using the modern motorized selector switch for your fuel injection? If so, I would use the 87 wiring and selector switch. Don't try to force the new style switch into the rectangle hole on your 77, you'll break the switch (yes, I did that). You will need to make the hole about a 1/4 inch larger.
Also, just curious, does the parking brake hit the flasher relay on your Painless fuse box? Mine does, and I was wandering if anyone else had the same issue

 

[Dleslie212]

Are you using the modern motorized selector switch for your fuel injection? If so, I would use the 87 wiring and selector switch. Don't try to force the new style switch into the rectangle hole on your 77, you'll break the switch (yes, I did that). You will need to make the hole about a 1/4 inch larger.
Also, just curious, does the parking brake hit the flasher relay on your Painless fuse box? Mine does, and I was wandering if anyone else had the same issue

Yes my entire fuel system has been modernized. Thanks for the heads up on the switch. My EBrake has been removed so both problem with the flasher

 

[Dleslie212]

Both headlight assemblies wired up this morning. Next will be getting the starter section finished, and then I SHPULD be done under the hood and moving on to cab

 

[Dleslie212]

Took a break for 4 months. It was too hot outside, and waited till it got a little cooler. Back at it. Got the tail end wiring mostly done. Installed a new ground strap and lug bolts for the bed to frame, and grounded all the rear wiring there as well. Next weekend will try to tackle the fuel pump wiring

 

[Dleslie212]

A few more

 

[Dleslie212]

No pics for this post but I did get a bit done. Got the fuel tabk selector switch and valve both wired in. Hoping to get the license plate lights wired In this weekend and then everything in the rear can be loomed and secured. Then it's on to finishing up engine compartment

 

[Dleslie212]

Little done today. Got the rear wiring finished up. Dual tank fuel valve and tailight wiring finished and loomed. Rear tailights, license plate lights, front side markers and front parking lights all replaced and wired up. Little bit left to do in the engine bay, and then on to the cab

 

[Dleslie212]

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