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  • 1996 - 2004 SN95 Mustang -General/Talk-
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gauge cluster doing full sweep at startup

  • Thread starter Thread starter teamhurst
  • Start date Start date Oct 20, 2011

teamhurst

New Member
May 25, 2011
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1
three rivers michigan
Oct 20, 2011
#1
  • Oct 20, 2011
  • #1
just a quick question i have a 04 gt i got back in early june. the day i got the car the first time i started the car the gauges did a full test sweep and i didnt see them do it again for 2-3 weeks after and then only a couple of times after now that its getting colder in the mornings and raining alot im seeing them do a test sweep first thing in the morning and some times at noon when i leave work for lunch and then sometimes at the end of the day.
all after the car as been seating for 2-3 hours or more
is there any meaning behind this more frequent test sweep? any help would be great thanks
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Oct 20, 2011
#2
  • Oct 20, 2011
  • #2
It means that the PCM and/or the cluster has lost power. Check the battery and battery cables for starters.
 
I

ItsStock02

Member
Aug 18, 2008
492
4
19
Westland, MI
Oct 20, 2011
#3
  • Oct 20, 2011
  • #3
Battery is going.
 

joshjwc9

Active Member
Jun 12, 2006
1,095
17
39
Palm Harbor, FL
Oct 20, 2011
#4
  • Oct 20, 2011
  • #4
Yep. I installed a new bezel today and unplugged it to clean everything. Did it on startup.

Happens when your battery is going. Replace it immediately because it will be dead sooner rather than later. I know this first hand.
 

teamhurst

New Member
May 25, 2011
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three rivers michigan
Oct 21, 2011
#5
  • Oct 21, 2011
  • #5
gee well isnt that great well theres a hundred bucks shot to hell thanks for the infor. it did help
 
C

cronin49

Banned
Aug 12, 2003
432
1
16
SC
Oct 22, 2011
#6
  • Oct 22, 2011
  • #6
ItsStock02 said:
Battery is going.
Click to expand...

100% correct. It happened to me twice before I realized that was the problem.
 

teamhurst

New Member
May 25, 2011
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three rivers michigan
Oct 24, 2011
#7
  • Oct 24, 2011
  • #7
not to sound like a total duns but we are talking about the battery under the hood right.
the car start just fine no probs there
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Oct 25, 2011
#8
  • Oct 25, 2011
  • #8
The cluster sweep means that power is being lost to the cluster. There are tons of places power COULD be lost. However, the usual place to start looking is the battery (yes it's located under the hood).

If the battery is good and the battery cables are clean and tight, then you day just got harder. So do yourself a favor and double check that the battery and charging system is in tip top shape.

Otherwise, expect to be looking for a loose ground, loose fuse, or other loose electrical connection.
 
I

ItsStock02

Member
Aug 18, 2008
492
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19
Westland, MI
Oct 25, 2011
#9
  • Oct 25, 2011
  • #9
My buddies 99 gt did the same thing before he replaced his dying battery. The car would crank, pause, then crank very slowly and the gauges would sweep every time.
 

txredgt

10 Year Member
Oct 26, 2009
1,343
33
69
Oct 25, 2011
#10
  • Oct 25, 2011
  • #10
Can someone describe the so called full sweep the cluster would go through? Never heard of it.
 
D

Deleted member 38176

Oct 26, 2011
#11
  • Oct 26, 2011
  • #11
txredgt said:
Can someone describe the so called full sweep the cluster would go through? Never heard of it.
Click to expand...

Turn the ignition on (not necessarily turning the motor over)

Needles on all 6 gauges sweep from the off positions to the max positions (fast)

Needles rest at max positions for a second or two, then sweep back down to the off positions (fast)

Needles then rise to normal positions when you normally turn the car on

 
I

ItsStock02

Member
Aug 18, 2008
492
4
19
Westland, MI
Oct 26, 2011
#12
  • Oct 26, 2011
  • #12
Hold the trip/reset button on the cluster and turn the key to the "on" position. The gauges will do their sweep.
 

teamhurst

New Member
May 25, 2011
20
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1
three rivers michigan
Oct 26, 2011
#13
  • Oct 26, 2011
  • #13
from the looks of things its the factory battery so that makes it 7 years old and its time for a new one . the clamps are clean and tight.
 
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