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I attempted to build my benchtop harness this weekend. I wanted to use 2 switches, one for powering up the benchtop and the other as an ignition switch. I believe I have everything close to being correct, but HPTuners is reading that the interface is connected, but not reading the "car" to be on. Hopefully someone can tell me what I am doing wrong.
This is how I currently have everything ran. Both switches appear to be working in this configuration.
run a ground to j1-1, 40 not to 60
B+ also to J1-57
some controllers also need ign to J1-75.
not all controllers need these, but all will work if hooked up like this.
efilive has a write up for this. Steve
I hate to admit this, but I picked up a multi-meter today and found that my power source positive and negative were backwards. I switched it around and re-adjusted my switches accordingly and everything is working.
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Benchtop Harness help 
I switched it around and re-adjusted my switches accordingly and everything is working. 
