Trinary switch ls3 Fan on with a/c

[dhutton]

Originally Posted by 130fe

Yeah Don, that last link was probably the one you used. I always wondered when using one of those adapters if the larger sensor body would get enough "exposure" to activate the sender trigger. Good to know they work. I had also looked into using one of those radiator hose "couplers". Most of them only had 1/4 npt threaded bung in them. You would have to drill and tap the thing for the 3/8 npt threads. In the end, I ended up getting an Entropy radiator. Nice piece, with powerful fans and it already have the correct 3/8 and 1/4 npt bungs in the unit.

Hi Chris. I have used a few Entropy radiators with good results. For my wife's car I got a deal on a Dewitt radiator and had to place the sender in the head. Seems to work fine.

Don

[redzo6]

Hello all, Well I have everything hooked up and triple checked. I am having a problem with the trinary switch not grounding out when the pressure reaches 220 psi turning the fans on.

The green entrophy wire which is attached to the blue wire on the trinary is putting out 4.5 volts (hooked or unhooked from trinary), the other blue wire on the trinary is grounded to the frame. The black and green trinary wires are hooked to compressor clutch and the other is hooked to a/c controls on the dash when power turns on.

The fans come on fine when the car reaches temperature but not when a/c pressure.
Both blue wires on trinary unhooked do not have continuity but when hooked up to entrophy wires, I get continuity.

I am so lost. cant figure this out. Thanks in advanced

[cpd004]

Were you able to resolve this? I'm considering that fan controller, and just want to make sure it will work with a similar swap I have going on.