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EFV-8 Club Forum / General Ford Discussion / electrical question

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46coupe

01-01-2016 @ 4:35 PM

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In that case I'll leave them as is. Thanks for the help.

Old Henry

01-01-2016 @ 2:36 PM

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Gauges don't care about polarity, except the battery gauge (ammeter). So no need to change them but you can if you want to for some reason.

46coupe

01-01-2016 @ 10:29 AM

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Thanks for the verification. Is it safe to assume that I could change the wires on the gauge? OR possibly leave it as is, neg ground until I go through all the wiring and connections, i.e. cleaning replacing or taping? Got a couple of minor leaks (I hope) to address before I take it out for a short cruise.
Thanks again for your time and help.

TomO

01-01-2016 @ 10:02 AM

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46coupe,

Happy New Year.

When you changed the battery polarity and polarized the generator, it did work. You only have to touch the BAT terminal of the regulator with the jumper wire from the ARM terminal to polarize the generator.

The reason that your ammeter showed discharged, is that whoever converted the car to 8 volts, NEG ground also rewired the ammeter to read correctly with that configuration.

Read my previous post about changing polarity. You can do as Old Henry says, but you may have problems with the way the car runs and charges the battery. These problems may not show up immediately. It would depend upon what components were changed when the polarity was reversed and how long the POS ground components were used with the car at NEG ground.

Tom

46coupe

01-01-2016 @ 8:52 AM

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Happy New Year everyone
I finally got around to trying the polarizing instructions that were suggested. My regulator has Arm, Field and Bat terminals. I put a clip on Arm and Bat which showed voltage. I did not touch the Field terminal as instructed. I should note that the battery was now connected using pos ground, previously it had been connected as neg ground.I started the car and the amp gauge showed discharge, rpm overthree thousand.
I then put the battery back to neg ground and the amp gauge showed charging. This tells me that polarizing the voltage regulator did not work. Did I do something wrong?
The armature and battery terminals are the only ones I can use. The author was adamant about not touching the Field contact. Thoughts? Appreciated.
Enjoy the holiday.

TomO

12-24-2015 @ 8:21 AM

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I am glad that you added that you have an 8 volt battery and that your ammeter reads in the correct direction. This helps us to give you the correct information.

Changing polarity is not just as easy as changing the battery posts and polarizing the generator.

You have to know the polarity of your coil and voltage regulator. If they are both + ground, you can change the battery polarity and polarize the generator. If either is - ground, you will have to change it before you change the battery cables.

I suggest that you get a new 6 volt battery,6 volt battery and starter cables, Pos ground 6 volt voltage regulator and a stock 46 coil and then change back to POS ground. It will make your car easier to service and probably improve the performance. You will have to rewire your amp gauge to read in the correct direction. This will ensure that every thing will work as designed.

Tom

This message was edited by TomO on 12-24-15 @ 8:24 AM

46coupe

12-24-2015 @ 8:03 AM

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Thanks Senior for the instructions however my voltage reg only has arm amp bat terminals. I assume that the bat is not touched. Does that mean I hook a clip to arm and touch the amp terminal or the other way around? Or do nothing to the volt regulator? Since I am showing a plus charge on the amp gauge does that mean all is well staying with the neg ground?
Thanks

46coupe

12-24-2015 @ 7:29 AM

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I just started the car with a neg ground. Amp gauge shows charging. Does that mean I can leave it as is? Or try starting it using the pos ground?

Old Henry

12-24-2015 @ 7:19 AM

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Here's the polarizing procedure: http://starautoelectric.com/page25.php

46coupe

12-24-2015 @ 5:42 AM

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I am not going to a 12 volt system at this time. What is the correct procedure to polarize the generator? Thank you all for the help.

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