Stereo replacement for 2003 Intrepid SE - Page 4 - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
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post #46 of 54 (permalink) Old 04-16-2018, 06:46 PM
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Wait....you were referring to the Blower Control Module as the BCM? LOL! The BCM is short for Body Control Module! Two different things. The Blower module should've been under the dash on the passenger side.

It's also referred to as the Blower Power Module in the FSM.

That leads to the question of why you haven't downloaded the Factory Service Manual? FSM. It's free and located at the top of the 2nd gen forum section. With that you would've already answered many of your own questions.
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post #47 of 54 (permalink) Old 04-16-2018, 06:52 PM Thread Starter
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Very true. Terry sent a link with it. But some of the stuff is a bit confusing, hence the call to Terry during dash removal. And also experience help a lot. You guys have a ton of experience and tips that the FSM does not provide. I have searched several post, like dash removal and found only like 4 and not all of them very helpful.
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post #48 of 54 (permalink) Old 04-16-2018, 10:42 PM
tgs
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So, you have the complete dash wiring harness. The lower harness Ron is talking about is the HVAC wiring harness.
It's just a couple of wires that snake around the big black heater/blower box.

What Ron is suggesting is that instead of removing the entire HVAC box, just disconnect the wiring harness and remove the blower control.
Removing this wiring will be much easier now that the dash is out of the way.
The blower control is held in with a few screws, has two connectors,is near the bottom center of the box and will slide out

The manual calls it a Blower Motor Resistor. There is a diagram on page 24-19

(1) Open hood and disconnect the negative battery
cable remote terminal from the remote battery post
(Refer to 8 - ELECTRICAL/BATTERY SYSTEM/CA-
BLES - REMOVAL).
(2) Remove lower right underpanel silencer/duct.
(3) Disconnect wiring connector to the blower motor resistor.
(4) Remove the blower motor resistor retaining screws.
(5) Remove the blower motor resistor from the HVAC housing.
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post #49 of 54 (permalink) Old 04-17-2018, 12:27 PM
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FYI/FWIW, for the MTC, the blower control module is a resistor (actually, several resistors in one package). For the ATC, the blower control module is active electronic circuitry that controls the motor speed with a PWM duty cycle. For convenience and simplification of searches, the FSM and aftermarket may refer to both types as a resistor even though for the ATC, it's more than a resistor (or resistors).
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post #50 of 54 (permalink) Old 04-17-2018, 01:49 PM
tgs
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Peva, I went back and re-read that section of the manual again.
I didn't realize they used two different names, power module for ATC,
blower motor resistor for MTC and both plug into the same location.

From the FSM:
The power module receives pulse width modulated
(PWM) signals from the BCM. The power module
varies voltage to the blower motor for different
blower speeds based on the ATC software. There are
14 selectable speeds, while the Auto mode provides
256 variations.
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post #51 of 54 (permalink) Old 04-17-2018, 09:31 PM
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Quote:
Originally Posted by tgs View Post
Peva, I went back and re-read that section of the manual again.
I didn't realize they used two different names, power module for ATC,
blower motor resistor for MTC and both plug into the same location.

From the FSM:
The power module receives pulse width modulated
(PWM) signals from the BCM. The power module
varies voltage to the blower motor for different
blower speeds based on the ATC software. There are
14 selectable speeds, while the Auto mode provides
256 variations.
Ahh, OK. So they do distinguish. It’s been a while since I read thru that - I couldn’t remember.

I wish they provided a way to tailor the speed curve in auto mode. Other than when you first start up and it runs full blast trying to play catch up in winter cold or summer heat, it generally seems to run slower than it really needs to - it seems I always end up flipping the knob to manually dial in a speed about 2 to 4 clicks higher than the auto speed would provide. After temperature stabilizes, there’s a fan speed sweet spot where the fan can barely be heard yet moves a little air to regulate temperature more tightly. Auto speed seems to skew the speed too far down - IMO.


'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs
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post #52 of 54 (permalink) Old 04-17-2018, 11:08 PM
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Just turn the knob! heh
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post #53 of 54 (permalink) Old 04-18-2018, 04:45 AM
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Quote:
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Just turn the knob! heh
What does the ‘A’ in ‘ATC’ mean? Thy need to call it SAATC. Semi-automatic assault temperature control.
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post #54 of 54 (permalink) Old 04-18-2018, 01:43 PM
tgs
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.
.
Semi-automatic assault temperature control.
.
.
Bump-stock not included.
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