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b73 wiring


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need help with wiring diagram. need diagram for 1957 b73, or somewhere about there, 12 volt positive ground, 24 volt starter, Cummins powered, with circuit breakers instead of fuses. got most of harness built need diagram to finish new harness, old harness copied as far as i could. had trucker/electrician make mods to it over years. engine going back in frame now, chrome sent out, cab ready to paint.  

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Here is a link to a B61 harness that will give you some info.  Click the pdf.  Trucks were pretty basic and the wiring was similar between the two models.

https://www.bigmacktrucks.com/tutorials/article/4-b-model-wiring-diagram/

Series parallel switch info for pos and negative ground.

 https://www.bigmacktrucks.com/tutorials/article/70-wiring-schematic-for-series-parallel-switch/

 

Post some pics of your project when you get a chance.  Everyone likes pics!

 

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Jim

It doesn't cost anything to pay attention.

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18 hours ago, B733 said:

need help with wiring diagram. need diagram for 1957 b73, or somewhere about there, 12 volt positive ground, 24 volt starter, Cummins powered, with circuit breakers instead of fuses. got most of harness built need diagram to finish new harness, old harness copied as far as i could. had trucker/electrician make mods to it over years. engine going back in frame now, chrome sent out, cab ready to paint.  

I've seen a lot of mods made to truck wiring over the years...it's usually more of a trucker than an electrician that cuts into them!

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  • 2 weeks later...
On 8/31/2018 at 8:49 AM, j hancock said:

Here is a link to a B61 harness that will give you some info.  Click the pdf.  Trucks were pretty basic and the wiring was similar between the two models.

https://www.bigmacktrucks.com/tutorials/article/4-b-model-wiring-diagram/

Series parallel switch info for pos and negative ground.

 https://www.bigmacktrucks.com/tutorials/article/70-wiring-schematic-for-series-parallel-switch/

 

Post some pics of your project when you get a chance.  Everyone likes pics!

 

Do these apply to a B422? The main thing I'm looking for is what batteries do I need to put in the truck. Do I need 2 or 4?

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The original system for the gas engine running a twelve  volt system ran a pair of 6VOLT Batteries in Series to get twelve volts.With modern battery technology you could run a single 12 volt battery or a pair of 6 volts in series to look factory.

"OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK"  Thomas Edison

 “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’

P.T.CHESHIRE

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