I am planning to install 2 gauges (boost/oil presure) in my MCS. I have a question about hooking up the wiring though. Should I first combine both the power and switched wires from both gauges into 1 single wire and then tap into the existing wiring of the car? Or, do I tap each power and switched wires from individual gauges and tap them separately into the existing wiring? I'm not that knowledgeable with electrical connections so any help would be appreciated.

thanks

 

Personally if it is like a power and/or ground wire I would combine the two with a way to separate (ie extra slack in the dash) for any future reasons and then only tap what I need to. The less additions to the factory harness or fuse box the better as long as the combined load to that circuit is not an issue.