[AT] Off Topic Need component location on truck

[David Myers]

Most air brake trucks have 2 valves, usually located on the left firewall though I have seen one with the valves behind the drivers seat.  You will find a hot w/ignition term, and one of the other terms hot when applying the brakes.  Now, more modern trucks have the trailer brake light operated when the pedal is applied and also when the ignition is on and the brakes set (buttons out). That would be the one to use.  Remember, the trailer brake lights must be separate from the turn signals. 
David

Sent from my iPad

> On Dec 26, 2014, at 8:09 PM, Cecil R Bearden <crbearden at copper.net> wrote:
> 
> I am trying to get this truck rigged out to pull my gooseneck and my hay 
> trailer.   I need to get my New Holland TS110 over to a mechanic to 
> split the tractor.  The truck  is a 1998 Chevrolet C8500 sometimes 
> called a Kodiak with a 3126 Caterpillar engine.  It has air brakes.   I 
> am trying to find the stop light relay.  I don't have any voltage at the 
> light wires at he rear of the truck.  It was a county mechanics truck 
> and they took the body off of it, and just left the wires hanging.  I 
> have turn signal voltage, and tail light voltage, just no stop lights.  
> This is set up like a Semi where the brake lights are separate from the 
> turn signals.  3 lights on each side of the truck.....  With all the 
> experience on this list I was hoping that someone had some experience 
> with this truck.
> 
> Cecil in OKla
> 
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