# dcc question

**URL:** <https://forums.speedlife.net/t/dcc-question/113797>\
**Category:** SON240sx Automotive\
**Created:** [March 11, 2008, 4:48pm UTC](https://forums.speedlife.net/t/dcc-question/113797 "2008-03-11T16:48:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\
**Post date:** [March 11, 2008, 4:48pm UTC](https://forums.speedlife.net/t/dcc-question/113797/1 "2008-03-11T16:48:51Z")

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So I got the unit and all kinds of sensors and stuff and followed the guide on nico for the most part but i got a few questions for the experts on here.

1- Do I still need the full cold motor or is it garbage?

2- The climate control in the car now has a sub harness that connects to the full cold motor, full cold motor relay, some kind of micro switch near gas pedal.

I removed this subharness and dcc still seems to work fine.

3- Is the sensor that mounts near the fan resistor needed? People call it a thermo amp?

4- When the dcc is working and I press auto it always turns on the a/c even if the temp is set to the hottest.

5- The mix motor mount to where the cable use to be but in it’s default position should it hold the air box to hot or cold?

Thanks guys

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**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\
**Post date:** [March 11, 2008, 9:16pm UTC](https://forums.speedlife.net/t/dcc-question/113797/2 "2008-03-11T21:16:57Z")

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Also Does anyone know about how to wire up the thermotransmitter for thr engine colant temp reading what wires on the dcc are these?

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**Author:** ![forrory](https://avatars.discourse-cdn.com/v4/letter/f/6de8d8/32.png) [@forrory](https://forums.speedlife.net/u/forrory)\
**Post date:** [March 12, 2008, 7:01pm UTC](https://forums.speedlife.net/t/dcc-question/113797/3 "2008-03-12T19:01:12Z")

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Doesn’t anyone know jack about this stuff ? Ok forget those questions how about this one. Everything works fine but when i turn on my lights the unit lights dim. why?