VCCA Home Forums TECHNICAL - 1945 AND NEWER 1946-1948 Rewiring My 48

Have you been driving your car? If you have and everything is working ok I wouldn't worry about it to much. As long as the ammeter is working ok.

Could not stand it any longer. Went and swapped the wires around, pulled the light switch and the needle on the amp/Batt gauge jumped to the (+) passenger side. My guess this is wrong???? What say you all? Remember, motor is not running.

Oh my gosh Russell...How did I know you would do this...? grin

Yes, you'll want to go back to the way you had it the first time...It was working properly...

I thought someone was going to YnZ for "tech" help on this matter...?

I haven't heard back from them yet. Would like the answer in writing as I emailed them. Will give them a couple of days before calling.

Ok guys here it is.."Typo in instructions"
1A has a pigtail on it,if you look at all the light switch pics.On the first pic you can see the 1A tag quite good.The YnZ instructions as follows:

1A "Batt"on voltage regulator to DS? ammeter to fuse bar on light switch

So if you connect the longest wire 1A to "batt" on the voltage regulator,run it through the grommet into the car connect the pigtail to the fuse bar at the top and then to (THE ""PS"" AMMETER)..So that means the DS ammeter goes to the stater switch and then to"B" on the horn rely.Then you will have what you see in my wiring.I must have figured this out by trial and error back then
Every thing works fine and always has since I wired it 10 years ago...Your thoughts

So to recap, this is what you are saying???? Your pic #2

Russell thats correct,i wish I could have got the info to you earlier so you would not had to pull everything out...Funny thing is that my instruction sheet is 10 years old and still today has the mistake???

PS = Passenger side, DS = Drivers side.

Here is a copy of the responce from YnZ I received this morning.

1A on DS of Ammeter and 7 on PS is Correct for 1948 Only......If someone has changed your ammeter over the years to a 42 to 47 the it would be the opposite as per the directions indicate.
When you get the harness installed it will show discharge if installed incorrectly. Unhook the Bat. and switch them.


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Have his name and phone number if you need it.

Quite interesting answer?
The 42-48 shop manual wiring diagram shows light switch to PS ammeter and starter switch to the DS..Is there an amendment in the manual for the 48 we are missing??

Then you've got it right, Russell...? I never would have thought the amp meter would head for the + when the headlights are turned on, but if they say so....

While I try and figure out how to seek revenge on you for upsetting the ammeter cart. Everything was just fine, then here comes Keith. JUST KIDDING!!! All I am going to add at this point is, according to my parts book, all pass cars '42-'48 call for the same ammeter 1500969 group 2.515. So, what's up with that.
Really Keith, no disrespect meant.
Bruce, yours works , so as the song goes, don't worry, be happy!!
Kevin, changed it back. Somehow I'm not convinced yet.

Wow, one never knows how much trouble you can get into by posting a question. (Also kidding) I'll try another question.
How is the best way to run the wires through the A piller up to the roof and then to the rear? My head liner has pieces missing so that is not a problem.

One mans way. I used the split plastic loom 1/2" I think, for a little extra protection, wrapped a "fish" wire about 30" long around the dash end and fed it down from the top, grabbed the fed wire and pulled what I needed up by the brake handle. Then, started with the other end (right brake light)and began feeding it over the roof supports and down into the trunk. It will lay in a small "troff". Once in the trunk it (right side) runs up over the trunk and along the wheel well in some welded on wire clips. Same along the left wheel well. I only used the plastic loom in places it could not be seen when finished. Once the long run is in place, the doom light feed should be close to where it should be.

It has been a few months so I have already forgot most of what I did and how it was done.

Doesn't the YNZ instructions have diagrams of the wire routes similar to the Fisher Body Book...?

Here's instructions I received with the harness years ago.As you see its for 42-48 and no reference to difference in the ammeter wiring for the different years,as they have told Keith





I do not remmeber a routing diagram

Just 2 pages like chev posted.

Another question. My generator isn't marked for the armature and field. The is a chevron looking thing by one of them. Does someone have a picture of there generator wiring?

Not mine, from my files. Have others if needed.

one more

Field is the top wire,goes to F on voltage regulator

Now I'm curious as to the coil wiring...'48, wait I believe '47 also, no longer came with the Electrolock coil/ign stuff...

Thanks guys, that is what I needed.

Looking at the parts book, the coil is the same from 47 to 54 passenger car. The ignition switch isn't very clear between electrolock or regular ignition switch.
Does yours have the 3 position switch with the tang on the bottom?

48,yes

My '47 has a two position switch...No tang on bottom...Three wire hook up...