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Username Post: Electric Drain        (Topic#366288)
DucatiRod 
Poster
Posts: 81

Loc: Maine
Reg: 12-31-20
08-31-21 02:05 PM - Post#2826334    

I posted this under Trucks '19 thru '59 but got no answer, so hope to get one here!
When I got my '54 3600 it already had 12 Volts and a one wire alternator. They had wired it directly to the junction at the starter, and doing so bypassed the amp meter. I rewired it using the original diagram and just bypassed the voltage regulator in a logical way, but now have an electric drain, but an amp meter that works! My question, before spending hours figuring this out, is there a trick to get this right (like a diode or something) This truck has the most difficult dash to work behind, and I've been behind many~



 


drummertom 
Member
Posts: 1949

Age: 68
Loc: Reidsville, NC
Reg: 09-03-06
09-01-21 06:01 AM - Post#2826372    
    In response to DucatiRod

Could you not just add a volt gauge instead of the amp meter? It doesn't go in in series, so IMO it is easier to wire.

www.picturetrail.com/drummertom

"Well my time went so quickly. I went lickety spickley out to my ol' 55"


 
bobb 
Super Senior Member
Posts: 5888

Loc: paradise
Reg: 09-05-03
09-05-21 11:32 AM - Post#2826574    
    In response to DucatiRod

did you pinpoint where the drain is coming from?

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
DucatiRod 
Poster
Posts: 81

Loc: Maine
Reg: 12-31-20
09-05-21 12:09 PM - Post#2826579    
    In response to bobb

Yes, I proved it yesterday, and it is the alternator. I put the volt meter between the + cable and the + battery terminal. With the alt. hooked up I read 12 volt, if I disconnect the alt. the voltage drops to zero.
Being I'm installing a big electric cooling fan, I've ordered a 100 amp relay to install between the alt. and the first connection after the alt. The magnet in the relay will be energized by the key, ignition is via a Magneto, so the key doesn't have much to do anyway.
I hope this ends the electric issues~



 
65_Impala 
Very Senior Member
Posts: 4793

Reg: 12-29-02
09-07-21 04:12 PM - Post#2826700    
    In response to DucatiRod

Alternator still wired as a 1-wire or you reconnected the other wires?

If it is a 1-wire connection still then it has an internal issue. Fix that instead of adding more parts to mask it.



 
bobb 
Super Senior Member
Posts: 5888

Loc: paradise
Reg: 09-05-03
09-07-21 09:24 PM - Post#2826726    
    In response to DucatiRod

it wont take much of an amp draw to get a 12 volt reading. countryboy amp gauge would be a light bulb with a known amp rating. i was thinking of suggesting a relay but your a step ahead of me there. a well placed relay can sometimes cure a migraine headache, or a huge cost.

70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails.


 
65_Impala 
Very Senior Member
Posts: 4793

Reg: 12-29-02
09-08-21 12:59 PM - Post#2826745    
    In response to bobb

Good point about the voltmeter measuring voltage with almost any load connected, even a load that is not large enough to be considered an abnormal battery drain. Should use an automotive light bulb or use the meter in current mode and measure the current.





 


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