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Old 03-20-2021, 07:27 PM   #1
ballencd
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Join Date: Aug 2013
Location: Columbus, NC
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1991 Suburban Speed Hut Speedo install problem

Hey Guys,

I have just installed a Speed Hut electronic speedometer in my 1991 V1500 Suburban. 5.7 TBI, 700R4, 241 transfer case.
Long story short....it does not work. The error I get when setting up the speedo is "No Signal". I am hooked to the pin 18 light blue w/black line which I believe comes from the DRAC and I expected it to work. I tried ground and no ground.

Any ideas?? I could use some help on this.

Thanks

ballencd
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1983 M35 (bobbed and converted to dump)
1988 Chevy Suburban (5.7TBI/TH700R4/NP208)
1991 Chevy Suburban (5.7TBI/TH700R4/NP241C)
2005 Toyota Matrix
2002 VW Passat (sold) (YEA!)
1986 M1009 (6.2/TH400/NP208) (sold)
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Old 03-22-2021, 11:49 AM   #2
Corts60
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Re: 1991 Suburban Speed Hut Speedo install problem

Just a thought: have you individually tested that the VSS is working?
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Old 03-22-2021, 04:28 PM   #3
ballencd
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Re: 1991 Suburban Speed Hut Speedo install problem

I assume it is working. When I took out the old speedo it was working but I don't know how to verify that.
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1983 M35 (bobbed and converted to dump)
1988 Chevy Suburban (5.7TBI/TH700R4/NP208)
1991 Chevy Suburban (5.7TBI/TH700R4/NP241C)
2005 Toyota Matrix
2002 VW Passat (sold) (YEA!)
1986 M1009 (6.2/TH400/NP208) (sold)
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Old 04-03-2021, 11:55 PM   #4
Ryan Hubbard
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Re: 1991 Suburban Speed Hut Speedo install problem

I would just take the signal straight from the transmission sensor to the gauge, bypassing the DRAC.
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Old 05-16-2021, 04:15 PM   #5
ballencd
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Re: 1991 Suburban Speed Hut Speedo install problem

I got it fixed. Had to install a "pull up" resistor on the signal line for the speedo to work.
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Apparently when I pulled the factory dash I also pulled the pull up resistor. IT works great now. I still need to tilt all the gauges back so I can see them as the factory dash will not allow that. I am going to build a aluminum dash and reinstall the gauges.Name:  IMG_3040.jpg
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Size:  42.6 KB It might be hard to see in the photo but the gauges little toward the driver and make it hard to see them.
__________________
1983 M35 (bobbed and converted to dump)
1988 Chevy Suburban (5.7TBI/TH700R4/NP208)
1991 Chevy Suburban (5.7TBI/TH700R4/NP241C)
2005 Toyota Matrix
2002 VW Passat (sold) (YEA!)
1986 M1009 (6.2/TH400/NP208) (sold)
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