Dim headlights

[DonaldSmith]

Is 4-4.5 volts the generator output at idle speed? Generators need rpms to have adequate output.  That's the advantage of alternators.  They have good output even at idle speeds.  

[cerick305]

Yes at idle speed

[Plymouthy Adams]

it appears it is time for you to break out he service manual and systematically test the charging system as outlined, get you back to speed without buying parts you don't need...

[Reg Evans]

As stated earlier on my 42 Dodge coupe I was only getting 4.5 volts to the headlight socket without the engine running so the new halogen bulbs were dimmer than the conventional ones.  I then installed a relay and cleaned all connections and got a reading of 5.8 volts at the socket.  Yay !!!!   Brighter lights now !!!!

 

[Uberchin]

20 hours ago, Reg Evans said:

As stated earlier on my 42 Dodge coupe I was only getting 4.5 volts to the headlight socket without the engine running so the new halogen bulbs were dimmer than the conventional ones.  I then installed a relay and cleaned all connections and got a reading of 5.8 volts at the socket.  Yay !!!!   Brighter lights now !!!!

 

What's the part number and where did you buy it? I'd like to do the same. Thanks

[Reg Evans]

I bought 3 different kinds for my cars.  I just made sure they had instructions. Found them on eBay by searching 6 VOLT HEADLIGHT RELAY.  I did my 33 Plymouth, 39 Chrysler, and 42 dodge.  

ebay #'s  311988207118,162737275380, and 401422563935 

Edited December 28, 2017 by Reg Evans

[Uberchin]

Thanks. I found one like yours. How did you wire up your 42 Dodge? I have a 47 Chrysler. 

[Reg Evans]

1 hour ago, Uberchin said:

Thanks. I found one like yours. How did you wire up your 42 Dodge? I have a 47 Chrysler. 

 

I followed these instructions that came with it.