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Electrical Cruise control

  • Thread starter Thread starter Brad Hanks
  • Start date Start date Feb 22, 2021
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Brad Hanks

5 Year Member
Jul 21, 2017
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Feb 25, 2021
#21
  • Feb 25, 2021
  • #21
So I took off the connector from the amp. Put my red lead on the green and white. Black lead on the orange and yellow. Put the voltmeter on ac, ran the car in 2nd on jackstands and got a big zero on the voltmeter. Where should I go from here?
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
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Feb 25, 2021
#22
  • Feb 25, 2021
  • #22
Brad Hanks said:
So I took off the connector from the amp. Put my red lead on the green and white. Black lead on the orange and yellow. Put the voltmeter on ac, ran the car in 2nd on jackstands and got a big zero on the voltmeter. Where should I go from here?
Click to expand...
Speedometer works by the way.
 

a91what

SendMeUrDataLog
10 Year Member
Apr 6, 2011
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Feb 25, 2021
#23
  • Feb 25, 2021
  • #23
You may have either a wiring issue or the VSS has failed. The next step is to remove the VSS from the tailhousing and set the multimeter up to read off of it while you spin it by hand or with a drill. If it still reads zero then it is likely bad
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Feb 25, 2021
#24
  • Feb 25, 2021
  • #24
Speedometer is mechanical. The VSS has no function there.

SInce that first test signals a failed VSS, I would back-up that test by probing a different location. I would test in the transmission harness that comes in from under the car. The harness runs under the driver's seat, and over to the driver's kick panel. Inside, you'll find a black 8-pin connector that should have the same wire colors in it. You can test at this location.

If it fails there, I would pull the VSS off completely and test it like steve said.
 
Last edited: Feb 25, 2021

Brad Hanks

5 Year Member
Jul 21, 2017
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Feb 25, 2021
#25
  • Feb 25, 2021
  • #25
a91what said:
You may have either a wiring issue or the VSS has failed. The next step is to remove the VSS from the tailhousing and set the multimeter up to read off of it while you spin it by hand or with a drill. If it still reads zero then it
Click to expand...
Thanks. At This moment it appears that it was bad from when it was brand new. But I will check it in a minute. Do you have any tips on how to get the sensor back in. The first time I tried it to put it back in the drive gear on the tail shaft moved and I had to pull the trans to fix it.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,216
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224
Massachusetts
Feb 25, 2021
#26
  • Feb 25, 2021
  • #26
I'd test right at the trans harness first. Closer to the sensor will help rule out field wiring issue first. If it were to fail there, then I would test the sensor itself. You can also buy a lead online, unplug the sensor, and connect wired to this and run it up.

You can find these pigtails sometimes at parts stores for cheaper
https://www.cjponyparts.com/speed-sensor-connector-pigtail-repair-harness-mustang-1983-2004/p/HW2295/?year=1994&msclkid=b9a6263701141d030302460f09108a89&utm_source=bing&utm_medium=cpc&utm_campaign=New%20Bing%20Shopping%20Ads&utm_term=1101201852447&utm_content=All%20Products

The speedo gear should not normally move just from inserting the VSS. The clip should hold it firmly in place.
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
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Feb 25, 2021
#27
  • Feb 25, 2021
  • #27
Mustang5L5 said:
I'd test right at the trans harness first. Closer to the sensor will help rule out field wiring issue first. If it were to fail there, then I would test the sensor itself. You can also buy a lead online, unplug the sensor, and connect wired to this and run it up.

You can find these pigtails sometimes at parts stores for cheaper
https://www.cjponyparts.com/speed-sensor-connector-pigtail-repair-harness-mustang-1983-2004/p/HW2295/?year=1994&msclkid=b9a6263701141d030302460f09108a89&utm_source=bing&utm_medium=cpc&utm_campaign=New%20Bing%20Shopping%20Ads&utm_term=1101201852447&utm_content=All%20Products

The speedo gear should not normally move just from inserting the VSS. The clip should hold it firmly in place.
Mustang5L5 said:
Speedometer is mechanical. The VSS has no function there.

SInce that first test signals a failed VSS, I would back-up that test by probing a different location. I would test in the transmission harness that comes in from under the car. The harness runs under the driver's seat, and over to the driver's kick panel. Inside, you'll find a gray 8-pin connector that should have the same wire colors in it. You can test at this location.

If it fails there, I would pull the VSS off completely and test it like steve said.
Click to expand...
is that trans harness under the drivers seat?
Click to expand...
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,216
17,899
224
Massachusetts
Feb 25, 2021
#28
  • Feb 25, 2021
  • #28
It runs under the seat but the plug is in the lock panel.

I got the color wrong. Black 8-pin connector. I found a pic of mine. Black connector coming up from the carpet

this plug is the last plug before you are at the sensor connection itself

 
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Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,216
17,899
224
Massachusetts
Feb 25, 2021
#29
  • Feb 25, 2021
  • #29
I had a spare VSS so I tried this out. Plugged in a harness end and set my DMM to 20v ac. I was able to spin up to 10 volts
 

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Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Feb 25, 2021
#30
  • Feb 25, 2021
  • #30
Mustang5L5 said:
I had a spare VSS so I tried this out. Plugged in a harness end and set my DMM to 20v ac. I was able to spin up to 10 volts
Click to expand...
I found it down in there. Looks like 0 on there too. I’ll give this a shot here in a bit.
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Feb 25, 2021
#31
  • Feb 25, 2021
  • #31
Put my drill on the sensor itself and the voltage goes up with speed. So looks like it’s a wiring issue.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,216
17,899
224
Massachusetts
Feb 25, 2021
#32
  • Feb 25, 2021
  • #32
If you don’t have it at the kick panel connection, the issue lies in that harness. I would just verify you had a good connection
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Feb 25, 2021
#33
  • Feb 25, 2021
  • #33
Mustang5L5 said:
If you don’t have it at the kick panel connection, the issue lies in that harness. I would just verify you had a good connection
Click to expand...
The connector is broken but all the way on. I’m thinking I cut it off then check it directly on the sensor.
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Feb 25, 2021
#34
  • Feb 25, 2021
  • #34
I’ve got power back to the crimp on the wire pulled out of the connector that goes to the amp now. So it seems I just need to find a way to keep the crimps from pulling out of the connector. I’ll try to get that fixed and I’ll update if this fixes the cruise.
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Feb 25, 2021
#35
  • Feb 25, 2021
  • #35
I also noticed the clutch switch wasn’t quite adjusted right. I got it now where it rests and if I move the clutch pedal a bit the state changes.
 

Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Mar 2, 2021
#36
  • Mar 2, 2021
  • #36
So today was the first time I got to drive it at speeds above 20. Kruse definitely works now. Appreciate all the help.
 
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Brad Hanks

5 Year Member
Jul 21, 2017
97
6
8
Mar 2, 2021
#37
  • Mar 2, 2021
  • #37
Brad Hanks said:
So today was the first time I got to drive it at speeds above 20. Kruse definitely works now. Appreciate all the help.
Click to expand...
Cruse*
 
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