Brake buddy won’t power up

[Kevin Clark]

Trouble with Brake Buddy. 

I bought a used brake buddy and cannot get it to power on. I have confirmed 12v power going into the unit. Power goes into circuit board but not out of circuit board  

What else am I missing? Do these breakaway connections have something to do with it?

[Martinvz]

You do not have a warranty on it anymore. So open it up and check inside. 
 

My BlueOx Patriot did the same and it has a 12v battery inside that died. Easy to find on Amazon and replaced it. Now it is still working and a much cheaper fix than $1500 for a new one. 
I suspect your may have a battery inside that could be replaced. 

[marsingbob]

There is no battery in it.    It should power on and run compressor with no breakaway connection.

Brake Buddy rebuilt mine for less than 1/2 new price but they will not rebuild very old units and I do not believe they will sell a control board.

[Kevin Clark]

After speaking with Brake Buddy I believe the circuit board is bad and this one is too old to repair. I’m so disappointed!

[Kevin Clark]

I have an old Brake Buddy I am going to try and replace a relay on. If that goes well maybe I’ll try  it on this board!