Thanks for info, Darren. I'm sure it was just the battery heater that caused
the PCM to adjust the voltage regulation. The battery heater had slipped my
mind, but it sure made sense when everybody suggested that's what it was.
I'm sure glad i don't live where it's -50*!!!! Heck, I think +50* is pretty
darn cold, I couldn't take it up there!
Will Coughlin willcoughlin@hotmail.com
'00 Reg. cab 2wd, 4.7L/NV3500HD/9.25" 3.92 sure-grip
----Original Message Follows----
From: "Darren Asuncion" <dakotaguy1999@yahoo.com>
Subject: DML: re: Couple issues w/ my truck today
Date: Mon, 10 Dec 2001 22:01:38 -0900
Will,
I don't have an answer for concern #1, since I don't have have a 4.7 in my
'99 Dak. The 5.2 in my Dak does make a slight ticking noise when cold (ie:
-30f). I figured it was due to thick oil, and it does not do this when I've
got the oil, battery, block, transmission heaters plugged in. I do have an
answer for concern #2. The charging system tends to put a little more juice
to the battery when the ambient temperature is low. There's a battery
temperature sensor underneath the battery, which reports battery temp to the
PCM. The PCM adjusts the charging system accordingly. I guess a cold
battery is harder to charge, which is why they up the voltage a little bit.
When its -50f here in Fairbanks, the battery gauge on my Dakota has been
known to read about 15.7 volts or so (if the battery pad is not plugged in).
When I plug the battery pad in (a necessity up here!), the voltage is just
to the right of 14v like it usually is. I think the battery temp sensor is
discussed in the FSM...might want to check.
Anyway hope this helps!
Darren Asuncion
University of Alaska, Fairbanks.
dakotaguy1999@yahoo.com
http://www.geocities.com/dakotaguy1999/dakota.html
'99 Intense Blue CC, Sport +, 4x4, 5.2 V8, 44RE auto, 3.55 lsd (8.25"),
4wheel ABS
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