Re: Factory temp gauge and aftermarket at the same time.
Can I hook up the single wire that feeds my factory gauge signal and the aftermarket to the same sensor at the same time?
No. The whole system is based on a voltage divider system. When you "add" to this simple circuit, now each gauge will be "reading" what they see--the sender with both gauges attached upsetting the original balance.
-If you don't stand for something, you'll fall for anything.