Strange wiring but it works

[harmony]

On my 48 Chrysler with fluid drive, I just by coincidence noticed that the wiring between my coil and transmission relay is wrong, but everything works fine.  The wire from the BAT terminal to the coil on my car goes to the positive side of the coil and the wiring diagram shows it going to the negative side.  However also going to the BAT terminal is a heavy red wire with a yellow tracer that goes to the ignition switch.  Even though that red wire with a yellow tracer is the cloth covered OEM wire, it's not shown in the wiring diagram but I have read that some cars are wired from the ignition switch to the transmission relay.  

Is my wiring set up indicating anything to you electrically minded folk?   

[chrysler1941]

Coil will work but weaker spark. 

My diagram shows relay and coil are powered from ignition key as you describe it. 

[harmony]

On 7/15/2021 at 9:33 PM, chrysler1941 said:

Coil will work but weaker spark. 

My diagram shows relay and coil are powered from ignition key as you describe it. 

Interesting about you saying it would have a weaker spark.  So I might as well move that wire over to the negative side of the coil and see what happens I suppose. ??

[chrysler1941]

9 hours ago, harmony said:

Interesting about you saying it would have a weaker spark.  So I might as well move that wire over to the negative side of the coil and see what happens I suppose. ??

You probably wont feel any difference. But knowing you connected it correctly must count for something

[harmony]

4 minutes ago, chrysler1941 said:

You probably wont feel any difference. But knowing you connected it correctly must count for something

Yeah, for sure.  I agree. 

[harmony]

So today I decided to switch that wire from the trans relay that was going to the positive side of the coil over to the negative side of the coil.  Then I thought I might fire up the old girl and go for a spin just to see if I noticed any difference,,,,,,,,,,nothing!  When I turned on the key there was a slight click noise coming from the trans relay.  Normally the click is a bit louder.  I hit the start button and nothing happened.  At that point I suppose I could have pulled out my multimeter and test light and started to investigate.  But I took the safe and sure route and switched back the wires as they were before and she fired right up.

Does anyone have any idea as to what is happening?  At this point I'm living by the rule "if it ain't broke, don't fix it"  and I'm just fine with the wire going from BAT to positive side of the coil.  But I am curious as to why it is wired that way and why it won't start when it's wired the way it's suppose to be.  ??