Startup Break-in Wiring (20 Viewers)

[Sparkman86]

Getting ready to crank up a rebuilt 1974 engine in a 1970 model FJ40. I've got wiring harness completed but want to start up with minimal electronic peripherals while I run the engine for the first time. Doing this mainly because electronics components are not yet complete and I want to minimize variables in the system in case I need to troubleshoot. Does this logic make sense?

If so, does this wiring harness path make sense to run essential engine systems? Essentially just plugging in these wires and leaving everything else disconnected from fuse panel.

 

[Jdc1]

How long till you’ll be wrapped?

 

[Sparkman86]

If you mean wiring harness wrapped, that is done now. I've got the front harness fully run in the truck and the highlighted wires above connected and continuity tested already. From what I can tell, I should be able to start and run as soon as I have a battery for it. I just wanted a second set of eyes, so to speak, to make sure I wasn't overlooking something that would cause a problem.

 

[Jdc1]

If you mean wiring harness wrapped, that is done now. I've got the front harness fully run in the truck and the highlighted wires above connected and continuity tested already. From what I can tell, I should be able to start and run as soon as I have a battery for it. I just wanted a second set of eyes, so to speak, to make sure I wasn't overlooking something that would cause a problem.

I meant done with the build. Seems like the long way around to halfway install the harness.

 

[Sparkman86]

Still some months away.

Meh, yes and no. Not really any extra work or longer way around. Just delaying when I make connections for "non-essential" electronics. I've never seen this truck run and have no idea the "running status" of all its parts. My thinking is that I risk blowing up fewer things by not connecting them, in the event I have a major electrical problem that I'm not yet aware.

I still have some rebuild and testing to do on fuel sender, light switches, turn signal relays, etc. I'm itching to start this up after 8 years of ownership and think I'm ready to do that now instead of some time next year when I finally get everything else working.

 

[charliemeyer007]

I think you are working too hard. I bought my current engine after seeing/hearing it run sitting on the ground. Had a coffee can of gas and a battery hooked up. Arc the solenoid presto it ran.

Pull all the fuses except ign.

 

[Sparkman86]

I think you are working too hard. I bought my current engine after seeing/hearing it run sitting on the ground. Had a coffee can of gas and a battery hooked up. Arc the solenoid presto it ran.

Pull all the fuses except ign.

This is what I'm here for. This is my first ever car build and I'm figuring it out as I go, but I don't see any reason I can't run it the way I have it hooked up right now like in the diagram I posted above. Just want to make sure I'll be able to start it and get up to engine temp for the recommended break-in steps so I dont blow up my new engine.

 

[zerotreedelta]

All you really need is 12v to the coil (yellow) and bump 12v to the starter solenoid (magenta) to crank it. Pull the coil wire and it'll shut down.

Add a mechanical oil pressure gauge for now and Bob's your uncle.