block heater to trigger rs?

2003 Dodge Ram Cummins Diesel

DEI 561-R remote start system.

There is no wts wire on these trucks.  I have read or heard that the wts can be triggered off of the block heater itself.

How can I do this?  Just hook up the wts wire based on the polarity that I see from the block heater?

Is it really that simple?

My wts light is only on for maybe 3 seconds.  The system currently waits 15 sec before it starts.

Is it possible to tap the glow plug wire then add 528t timer set at 4secs.?

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

These trucks don't have glow plugs, they have a heater grid.  It has a big honking wire going to it right at the intake.  I would like to attach the wts trigger wire here and as soon as the heater goes off, have the truck start.

I put this same system on an 01 Dodge diesel but it had the actual wts wire I was able to tap into.  These new trucks use a bus from the pcm.

Ignore remote's starter output violet?), remote's first ignition output, pink (?) to BLACK/ white of 528t, cut loop on 528t, red and yellow to constant 12v+ via a 20amp fuse, cut brown, black to ground and orange to vehicle starter wire, add a relay if two starter wires, set 528t for 4 secs.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.

CORRECTION! Use 561 status or GWR output, to BLACK/ white, don't cut the loop, wire the rest as above. More fail safe.

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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.