Can someone explain why the universal wiring harnesses have a wire going to the alternator output ? They also have a wire going to battery/or starter ...for constant 12v ......... so whats the purpose of wiring to the alternator then ??
I can't explain it....your question is too vague. Show me a schematic, with an arrow pointing to the wire you're talking about, and then I can explain it.
Common squirrel - you can normally guess ,my halfasssed spenglish Says connect Red wire to solenoid of starter - ok fine - 12v consgtantg But also says - connect other red wire to alternator. Thats an EZ harness I am using on an EFI swap. But its also in painless isntructions ... Page 54/55. https://www.painlessperformance.com/Manuals/10102.pdf Why are we connecting to the alternator - when in a single wire setup its just feeding the battery - and your already connected to that via the starter.
I still don't understand the question. On the painless diagram, it has numbers on the wires. Which wire is it you are curious about?
Well I only have a 1 wire alternator. That wire is a fusible link that goes to the main wire at battery. So why would I need to connect the wiring harness (any wire) to the alternator. ?? Im going to be putting the larger red wire labelled Solenoid Power to the power 12v terminal of the starter solenoid post where the battery wire is currently located. So my question in the 1st EZ wiring schematic is ..... What is the red wire labelled "alter pwr=red" used for ...... since the other end of it routes through the main fuse box.
Wait ..... Is this actually the charger wire that will feed the battery ? An since I already have on from the donor vehicle ....... I basically dont need it ?
At some point, the alternator needs to be hooked to the battery In order to keep it charged. Sent from my SM-T350 using The H.A.M.B. mobile app
Right. But I already have a fusible link wire feeding out the top of my alternator to the large battery wire connected to both battery and starter. So ..... I think I dont need this "alter wire" in the harness - I can depin it --- its just for charging which I already have. I was reading it as 50% of main harness 21 circuit gettting power from starter and other 50% from alternator ..... and had me confused. think thats right now ...
Remember, we can't see your car. If you want us to be able to see what you can see (such as an existing wire from the alternator to the battery) you have to show us a picture, or something.
If it is redundant, eliminate it. On cars with ammeters, it is necessary to run the wires in a certain sequence so that the ammeter reads correct, but with the onset of voltmeters, this is not the case.
ok - so to make it easy - forget about my car. In the top EZ diagram. What is the red wire labelled "alter pwr=red" used for.
One wire alts only need the fusable link large red wire. The other one is for the type of alt that requires a plug in connector as well. At least that's how mine is. One big wire to the pos starter post.
On an internal regulator alternator, but not one wire, the #2 spade on the side plug needs to have voltage to excite the alternator to initiate charging. This wire is so labeled on the "late" alternator shown in the diagram you provided. Often this wire can be omitted if revving to 2000rpm will self excite the alternator.
Same here. I have a the wiring harness that is plugged into the alternator. Then the only "STUD" that connect anywhere is just a fusible link that connects to the battery to charge. I *think* this red wire in this harness is for you if have a brand new engine with NO wiring. It will conenct the alternator to the battery ...... allowing charge. But its just not clear If that is the case .... I dont need it.
Yes, the harness is designed to be installed on a car that does not have any wiring yet. That's obvious to me, but I guess it's not obvious to everyone. They should make that clear, eh? Step 1. Remove ALL existing wiring. Step 2. Install new harness. .
Sort of became obvious when I asked myself what the harness was originally designed for. Just without seeing how it all routes and is protected --- and using a newer engine ........ made me think that they were sourcing 12v+ to power the harness from 2 points so to speak. Not sure whay I thought that ...... but did. Segway still wiring ...... ignition switch. Is this how most people wire their harness to their ignition (with proper soldered/crimped connects of course. ust seem to be big wires ...... I know they are fused at the terminal block...... but just want to make sure as I assume a lot of current goes through that on startup etc.
Use terminals, but yeah, you have to connect big wires to the ignition switch. Usually #10 to #14, depending on the circuit.
And thats safe I assume. Been done on 1000's of verhicles ...... etc. Just trying to make sure I wire it as good/safe as possible as dont ever want someone driving it (wife) have to deal with a fire or nostart scenario etc.
Careful wiring routing is probably the most important thing. Make sure the wires won't contact anything sharp or hot.
Yep --- all split loomed and tucker away using grommets. Whats a switch like that typically rated for ??
I don't know. They usually work, though, as long as you don't try to run high power accessories from it directly. So, use relays if you plan to have an electric fan, AC, power windows, etc.
Use terminals. And a good crimp tool. If you must wrap a wire around a stud, wrap it clockwise, not counterclockwise like shown in the picture. You want the nut to draw the wire in as you tighten it, not push it out. Sent from my iPad using The H.A.M.B. mobile app
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