My aux fan runs off a dual input controller--one side for the compressor, and the other side on a temp probe in the radiator. This would suit your purposes I think.....
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My aux fan runs off a dual input controller--one side for the compressor, and the other side on a temp probe in the radiator. This would suit your purposes I think.....
on my 96
The temp switch connector has two pins
pin 1 green with yellow stripe leads to a normally closed relay that interrupts the AC clutch power when the overheat switch activates.
pin 2 white with black stripe is a ground,
If you connected the ground end of your alarm to pin 1 it would see
nothing when ac is off
battery + when the ac is on
and ground when the switch hits 226.
only remaining question is how much current overhead the switch has, an LED should be no problem, a large buzzer or incandescent light might, ifyou wanted to run something with any meaningful current draw a realy could be used to take the load off the switch ( with is how it is used stock)
Hi guys. Will this mod work with an 80 series that has the 1HD-T in it? I know there was a very similar gague mod for the surf temp gauges so maybe Toyota used the same if not very similar senders and gauges in a similar era of vehicles? Oh the 1HD-T is a diesel by the way. Cheers.