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Hi Guys,
I'm away from my truck at the moment and was wondering if anyone knew off the top of their head where the circuit breakers would likely be located on my '53 M43? Are they behind the instrument panel? I am working with Vintage Wiring to get a new harness and they need that info.
Thanks again for your help.

Justin

They are located on the brace behind the instrument panel that the handle for the cowel vent is attached to. There is a picture in the tm 9-8030
page 271.
I belive correct number is 3 breakers one behind the other on the brace.
hope this helps.

rixm37 wrote:They are located on the brace behind the instrument panel that the handle for the cowel vent is attached to. There is a picture in the tm 9-8030
page 271.
I belive correct number is 3 breakers one behind the other on the brace.
hope this helps.

thanks, I do have the manuals so I'll double check. Appreciate the quick response!

The number of breakers would depend on the age (year) of the truck and the accessories installed. My old '54 model was just your basic version with no added goodies. In stock mode, it had only 2 breakers installed, although there were provisions for a 3rd one if needed.

Lifer wrote:The number of breakers would depend on the age (year) of the truck and the accessories installed. My old '54 model was just your basic version with no added goodies. In stock mode, it had only 2 breakers installed, although there were provisions for a 3rd one if needed.

good point Lifer. I wonder if the ambulance had 3 (or more?) due to all the additional electricals in the back? I'm not sure if the quantity is critical to building a new harness.

My truck came with three, the unused auxiliary power one I hooked up to the convoy light I installed.

Can anyone tell me what the Amp ratings of the 3 breaker should be ? I believe they come in 15 and 30 amp ratings....

Sal

My #3 was 15A

Carter, What are your others rated at ? I have 2 rated at 15 Amps that's the one for the horn and the one for the auxiliary. But I cant tell what the other one rated at...

Sal

The Ord 9 lists 4 pn 7760416 waterproof, auto reset, 15 amp. And describes 5:

1 - Horn
2 - Light switch feed
3 - Spot light
4 - Map Lite (M42)
5 - Auxiliary Power Plug

The ORD 9 also lists 1 PN 7762620 15 amp for the early instrument cluster.

Sal wrote:Carter, What are your others rated at ? I have 2 rated at 15 Amps that's the one for the horn and the one for the auxiliary. But I cant tell what the other one rated at...

Sal

All that came on my truck are 15A . 30 Amps is a lot of power and can't think of anything on our series trucks that needs that much.

M43 breakers, no amps listed:

Thanks Carter . Wes you listed two part numbers. I was using Saturn Surpluses web site as a reference. They show a listing for two types of 15 amp Breakers, # 776046 and # 7762620 . Physically they look the same. Can anyone tell me what the difference is ?

Sal

Carter wrote:

Sal wrote:Carter, What are your others rated at ? I have 2 rated at 15 Amps that's the one for the horn and the one for the auxiliary. But I cant tell what the other one rated at...

Sal

All that came on my truck are 15A . 30 Amps is a lot of power and can't think of anything on our series trucks that needs that much.

M43 breakers, no amps listed:

thanks Carter, I'll assume 15A

Hello Sal,

Saturn is short a digit in their Ord part number 776046 which should be 7760416.