This is for an automotive application.
I've done an engine swap in a car and have finished everything but the Air Conditioning.
This particular vehicle uses a computer to control the AC. It's working and outputs a 4.6v signal on the AC control wire when you press the AC button on the climate control. The current on the signal wire is only about 4-5 mA.
The original engine computer looks for that signal and then raises the engine idle and grounds the relay for the AC compressors magnetic clutch. Simple.
However, the new engine computer is looking for a 12v signal!
I've tested this by supplying the ECU with a 12v on the signal wire (everything works)
So what I need is a relay that will sense the small (4.6v, 5mA) voltage/current and switch on a 12v signal to the engine computer.
I assume this would be some type of solid state relay, maybe inductive?
If someone could point me to a product or alternative solution I would be very grateful.
-Tyler
I've done an engine swap in a car and have finished everything but the Air Conditioning.
This particular vehicle uses a computer to control the AC. It's working and outputs a 4.6v signal on the AC control wire when you press the AC button on the climate control. The current on the signal wire is only about 4-5 mA.
The original engine computer looks for that signal and then raises the engine idle and grounds the relay for the AC compressors magnetic clutch. Simple.
However, the new engine computer is looking for a 12v signal!
I've tested this by supplying the ECU with a 12v on the signal wire (everything works)
So what I need is a relay that will sense the small (4.6v, 5mA) voltage/current and switch on a 12v signal to the engine computer.
I assume this would be some type of solid state relay, maybe inductive?
If someone could point me to a product or alternative solution I would be very grateful.
-Tyler