wiring question
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Tuned
Joined: Dec 2017
Posts: 353
Likes: 6
From: Arkansas
wiring question
Am in the process of wiring a 239 6v system, the gauges I bought are 12 volt so I bought a step up transformer, ( 6v to 12v), to run the gauges. I am told that the current from the generator goes through the ammeter and back to the battery. My question is the wiring diagram that I have shows a wire from the ammeter going to the breakers and supposedly back to the battery, now with the gauges being 12 volt am I not sending 12volt back into a 6 volt system?
Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Am in the process of wiring a 239 6v system, the gauges I bought are 12 volt so I bought a step up transformer, ( 6v to 12v), to run the gauges. I am told that the current from the generator goes through the ammeter and back to the battery. My question is the wiring diagram that I have shows a wire from the ammeter going to the breakers and supposedly back to the battery, now with the gauges being 12 volt am I not sending 12volt back into a 6 volt system?
Example:
Fleet Owner
Joined: Jul 2004
Posts: 27,294
Likes: 1,055
From: NM
Did you truly buy a step-up transformer, or an electronic device that makes 12v from 6v? A transformer only works on alternating current, not DC like vehicles have.
I agree with Mark, might as well convert the whole truck to 12v.
I agree with Mark, might as well convert the whole truck to 12v.
Logistics Pro
Joined: Sep 2014
Posts: 4,920
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From: Bothell & Silverdale, WA
Cargo Master
Joined: Aug 2014
Posts: 2,594
Likes: 72
From: North Central Arkansas
You will need to change the heater motor or use a voltage reducer. All the light bulbs will need to be changed to 12V. Since you are using aftermarket 12V gauges, they should have the proper senders for oil, water temp, and fuel for 12V. The switches, start solenoid, and starter will work fine on 12V.
Mark
Mark
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Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Addendum to Mark's
The horn and horn relay will work on 12 volts too, but will sound different. Are you using a complete new instrument cluster set of gauges or the trio under dash set? The reason I ask is that if you are going to use the stock ammeter you will need to reverse the direction the wire that passes through the ammeter loop in order for it to read correctly, other than that no further changes to the wiring is necessary (you will have redundant wires from the old generator and voltage regulator).
Just to recap the changes:
1) Battery & bulbs
2) Voltage reducer for heater motor (or upgrade to 12v motor).
Just to recap the changes:
1) Battery & bulbs
2) Voltage reducer for heater motor (or upgrade to 12v motor).
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Tuned
Joined: Dec 2017
Posts: 353
Likes: 6
From: Arkansas
You will need to change the heater motor or use a voltage reducer. All the light bulbs will need to be changed to 12V. Since you are using aftermarket 12V gauges, they should have the proper senders for oil, water temp, and fuel for 12V. The switches, start solenoid, and starter will work fine on 12V.
Mark
Mark
Cargo Master
Joined: Aug 2014
Posts: 2,594
Likes: 72
From: North Central Arkansas
Speedway Motors has a number of alternator brackets and pulleys for the flathead V8. They also have alternators that look like generators for the flathead, but they are pricey. You can change out the tail light, parking light, and headlight bulbs for 12V bulbs.
Mark
Mark
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