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1979 Datsun 210 - Relay Issues


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Hello everyone I bought my first car a while which is a Datsun 210 (I would post pictures but I cant?)

 

But my question if anybody is kind to help is that it seems that it has a faulty ''Auto Choke Relay'' and haven't been able to find one for it, nor have the great people of a local Nissan Dealership that I have taken the car to.

 

Am I really out of luck or can bypass this issue somehow? I have no real knowledge, so anything helps

 

Thanks

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Hello _____? and welcome to Ratsun.

 

 

If you have no real knowledge, maybe the problem isn't the relay but something else wrong with the choke? So a few questions...

 

 

What is wrong with your choke... is it on all the time or off all the time?

 

Is your alternator working properly? has it been replaced recently or worked on?

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Oh yeah my name is Christian, I mean I dont have real knowledge myself but my father works at Nissan dealership and had other mechanics look at it and deduced the relay to be the issue.

 

What I know is that the alternator was replaced with a new one and the battery is not charging.

The Choke is off all the time.

And the Charge warning light is always on.

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This is why I asked about the alternetor. One of the conditions of the choke relay being on is the alternator MUST be charging. Fix the charge issue and the choke relay will follow.

 

Take the alternator back. The rebuilt crap these days is 50% 'bad in the box'. The original factory alternators are about $250 so with that $50 Auto Zone... ya gets what ya pay for.

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The plug looks like a T. The top of the T wire (likely Yellow) is the sense wire....

 

The Yellow wire provides a sense voltage from the battery and tells the internal regulator when it is exceeded so it can lower current (and magnetism) through the rotor. Should read 12 volts engine off and 14 running.

 

 

The other wire (probably White/Red) goes back to the red charge lamp and then to the battery. When alternator is not charging current flows from battery through light (turning it on) and provides a small current to the magnetize the electromagnet coil in the spinning rotor. This amount is decreased as alternator output equals a pre selected amount by the regulator. When charging, the alternator produces 12-14 volts and as this is about equal to the voltage on the other side of the lamp it now goes out. If running... about 14 volts. If not running probably reads at ground through the alternator.

 

 

Take it back where you got it and have them test it. They are often 'bad in the box'

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