I'm installing my Greddy EGT gauge. The power source harness has 4 wires :
 My question is about the red and orange lines. I presume the red is a permanent +12V and the orange is a switched +12V, when ignition is on. My gauge doesn't have memory, so I don't see why it could need a permanent +12V. I presume they use the same harness for all their products, so with other gauges the permanent +12V could be necessary. But in my case, can I connect both red and orange wires together, to an ignition line ? Thanks
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