Electrical Problems 1951 Plymoth

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Old 01-12-2014, 09:21 AM
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Electrical Problems 1951 Plymoth

I have a 1951 Plymouth cranbrook. Tried to jump start it with a 12 volt battery and now have no electrical at all. Need help
Old 01-12-2014, 10:45 AM
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I don't have documentation that old. Found a 55 wiring diagram, here:

http://www.mymopar.com/downloads/1955/55Plymouth6.JPG

The thing is, there does not appear to be any fuse links, breakers or fuses between the battery and the ammeter, or the ignition switch.

I would probe around, you have power?

at the ammeter terminals?

At the "BAT" terminal of the regulator?

At the ignition switch?

Are you sure? the battery is actually making contact at the battery cable clamps?

Where have you checked for power?
Old 01-12-2014, 11:56 AM
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that one has a mechanical volt reg. and can be adjusted, but is not easy i think. but i have not had repair them at all. there are resistors on the bottom. check to see that they are not broke / burned out.
Old 01-12-2014, 12:36 PM
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Like 440 said...you just got to get out the test light and start tracing....

Last edited by RacerHog; 01-15-2014 at 02:58 PM.
Old 01-13-2014, 07:03 AM
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make sure you have a 12v system--if it's 6v for whatever reason, jumping with a 12er could be bad.
Old 01-14-2014, 08:42 PM
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thoe problem is the system is 6 volt. Nothing turns on-ngo lights, no gages, nothin
Old 01-15-2014, 08:03 AM
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Originally Posted by cyclopes
thoe problem is the system is 6 volt. Nothing turns on-ngo lights, no gages, nothin
Well look, you can't just stand there and wish you could, you have to get your hands dirty

What have you checked? You haven't helped US a bit.........you have a wiring diagram, online? That we can look at?

Have you at least checked at the ammeter? At the regulator BATT terminal? That would show you have a continuous path from battery back through the ammeter / wiring to the regulator

How about the battery terminals / cables?

Otherwise, we might as well be telling jokes over coffee
Old 01-20-2014, 03:51 PM
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Originally Posted by 440roadrunner
Well look, you can't just stand there and wish you could, you have to get your hands dirty

What have you checked? You haven't helped US a bit.........you have a wiring diagram, online? That we can look at?

Have you at least checked at the ammeter? At the regulator BATT terminal? That would show you have a continuous path from battery back through the ammeter / wiring to the regulator

How about the battery terminals / cables?

Otherwise, we might as well be telling jokes over coffee
Old 01-20-2014, 03:53 PM
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Thats the problem. Where do I start The cables are good and battery charged.
Old 01-20-2014, 06:24 PM
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Originally Posted by cyclopes
Thats the problem. Where do I start The cables are good and battery charged.
I told you earlier...........check at the regulator.

There are three terminals on the regulator

One goes to the output of the generator which is Armature

One goes to the generator Field

The third goes to the ammeter and back to the Battery

Similar to this. This is Ford/ Merc and the order of the terminals might be different, but they will be marked

http://www.tradeclassiccar.com/wp-co...-regulator.jpg

So if you have power at the regulator BATTERY terminal, this shows power is getting through the ammeter circuit and to the regulator.

Probably the next step is check power at the ignition switch.

That's all I can tell you You are going to HAVE to "get your hands dirty." Without being there, impossible to do anything else.
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