1991 electric suburban gauges into a square ls swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chuychevy82lwb · 11-03-2016, 12:10 PM

So guys i wanted to see if any one could help me out on this . Long story short i have got a hold of 91 burban gauge cluster and i have the voltage to work the temp (with adapter on the passanger side head and electric sender) but o cant seem to get the speedo to work i repined it and ran a wire from the 4k output to the speedo but no luck . I thought it was the speedo that was bad so i found a guy parting out a 90 burban and took thoes gauges and still nothing . Am i missing something .

87chevy.com · 11-03-2016, 07:01 PM

Quote:

Originally Posted by chuychevy82lwb

So guys i wanted to see if any one could help me out on this . Long story short i have got a hold of 91 burban gauge cluster and i have the voltage to work the temp (with adapter on the passanger side head and electric sender) but o cant seem to get the speedo to work i repined it and ran a wire from the 4k output to the speedo but no luck . I thought it was the speedo that was bad so i found a guy parting out a 90 burban and took thoes gauges and still nothing . Am i missing something .

did you repin the cluster connector or plug it directly in? if so, you have to repin it to match your truck, super simple as the printed circuit is easy to read. The speedo is simply, ground, power and vss input. nothing else. If you have the connector pinned correctly, verified power and ground is good, verified vss output, you got a bad speedo. I have a spare one or 2 in the attic

chuychevy82lwb · 11-03-2016, 07:07 PM

I repined it but it cant be the gaugues i physically saw the speedo work b4 it was pulled

87chevy.com · 11-03-2016, 09:57 PM

If you know it works, its narrowed down to the wiring or ecu. Double check the correctly pinned , power, ground and signal from the pcm. Then check the vss output sensor wires to pcm. If wiring is good pcm or pcm calibration somehow is bad
Clint

chuychevy82lwb · 11-03-2016, 10:26 PM

How would i check the vss output ? Amd what pin would i need to asure has power to rule out iys a lack of power flowing through it

LeesTruk · 11-04-2016, 05:43 AM

Check continuity from the VSS wires (Pin A ppl/wht, Pin B lt grn/blk) to the PCM connector C2 (green connector) Pin #'20 (lt.grn/blk), and Pin #21 (ppl/wht). The output wire to the speedometer is also from connector C2, pin #50 (grn/wht). Again, check continuity on this wire. If continuities are good, and terminal pins are firmly in place, then you can check VSS output by raising the rear of the truck, disconnect the VSS connecter, put your test leads on the two VSS pins, the meter on AC voltage and have someone put the truck in drive so that the rear wheels move. If you have an AC voltage reading, then the VSS is working. Or, you can just back probe the C2 connector at pins #20 and #21 for the voltage reading (probably safer). If that's good, then the PCM is most likely the culprit. Assuming, of course the connection at the speedo is good. The film circuit boards can sometimes be tricky

LeesTruk · 11-04-2016, 06:37 AM

Had another thought after writing the previous post. If you have access to a scan tool, see if it has live data for a speedometer reading. That would tell you that your electronics part of the "equation" is working

chuychevy82lwb · 11-04-2016, 10:42 AM

Ill def. Check it out thanks you so much by any chance would you know what pin on the connector (back of the speedo ) would need to get 12v

LeesTruk · 11-05-2016, 05:01 AM

When you installed the Burb speedo., did you re-pin the cluster wire connector from your truck (what year, BTW?) to match that of the "90 Burb? Here's what the cluster wants to see;

Pin # Wire and original color
1= Hi Beam, Lt.Grn
2= Ground, Blk
3= Oil Press., Lt.Brn
4= 12V ign. Feed, Pnk/Blk
5= Low Volt Light, Dk. Brn
6= Not used
7= Not used
8= Coolant Temp., Torquise
9= Illumination, Lt. Gray
10= LH. Turn Sig., Lt. Blu
11= RH. Turn Sig., Dk. Blu
12= Empty
13= Seat Belt, Yel.
14= Fuel Sender, Pink
15= Brake, Lt. Brn/Wht
16= Serv.Eng.Soon, Drk. Brn/Wht
17= 12V Ign., Pnk/Blk
18= VSS from PCM, Lt. Blu/Blk

When I did my '80 LS swap, I used the '90 Burb cluster, and the only wires that did not have to be swapped were #'s 1, 4, and 13

chuychevy82lwb · 11-05-2016, 07:48 AM

Ok sweet and yes i repined it and its a 82 silverado with a 91 suburban gauge cluster

11-03-2016, 12:10 PM	#1
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	1991 electric suburban gauges into a square ls swap So guys i wanted to see if any one could help me out on this . Long story short i have got a hold of 91 burban gauge cluster and i have the voltage to work the temp (with adapter on the passanger side head and electric sender) but o cant seem to get the speedo to work i repined it and ran a wire from the 4k output to the speedo but no luck . I thought it was the speedo that was bad so i found a guy parting out a 90 burban and took thoes gauges and still nothing . Am i missing something . __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

11-03-2016, 07:07 PM	#3
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: 1991 electric suburban gauges into a square ls swap I repined it but it cant be the gaugues i physically saw the speedo work b4 it was pulled __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

11-03-2016, 09:57 PM	#4
87chevy.com BMW & ASE Master Certified Join Date: Feb 2004 Location: Houston, Texas Posts: 1,256	Re: 1991 electric suburban gauges into a square ls swap If you know it works, its narrowed down to the wiring or ecu. Double check the correctly pinned , power, ground and signal from the pcm. Then check the vss output sensor wires to pcm. If wiring is good pcm or pcm calibration somehow is bad Clint __________________ 1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress Last edited by 87chevy.com; 11-03-2016 at 10:24 PM.

11-04-2016, 05:43 AM	#6
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 429	Re: 1991 electric suburban gauges into a square ls swap Check continuity from the VSS wires (Pin A ppl/wht, Pin B lt grn/blk) to the PCM connector C2 (green connector) Pin #'20 (lt.grn/blk), and Pin #21 (ppl/wht). The output wire to the speedometer is also from connector C2, pin #50 (grn/wht). Again, check continuity on this wire. If continuities are good, and terminal pins are firmly in place, then you can check VSS output by raising the rear of the truck, disconnect the VSS connecter, put your test leads on the two VSS pins, the meter on AC voltage and have someone put the truck in drive so that the rear wheels move. If you have an AC voltage reading, then the VSS is working. Or, you can just back probe the C2 connector at pins #20 and #21 for the voltage reading (probably safer). If that's good, then the PCM is most likely the culprit. Assuming, of course the connection at the speedo is good. The film circuit boards can sometimes be tricky

11-04-2016, 06:37 AM	#7
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 429	Re: 1991 electric suburban gauges into a square ls swap Had another thought after writing the previous post. If you have access to a scan tool, see if it has live data for a speedometer reading. That would tell you that your electronics part of the "equation" is working

11-03-2016, 10:26 PM	#5
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: 1991 electric suburban gauges into a square ls swap How would i check the vss output ? Amd what pin would i need to asure has power to rule out iys a lack of power flowing through it __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

11-04-2016, 10:42 AM	#8
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: 1991 electric suburban gauges into a square ls swap Ill def. Check it out thanks you so much by any chance would you know what pin on the connector (back of the speedo ) would need to get 12v __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "

11-05-2016, 05:01 AM	#9
LeesTruk Registered User Join Date: Mar 2015 Location: Manchester, CT Posts: 429	Re: 1991 electric suburban gauges into a square ls swap When you installed the Burb speedo., did you re-pin the cluster wire connector from your truck (what year, BTW?) to match that of the "90 Burb? Here's what the cluster wants to see; Pin # Wire and original color 1= Hi Beam, Lt.Grn 2= Ground, Blk 3= Oil Press., Lt.Brn 4= 12V ign. Feed, Pnk/Blk 5= Low Volt Light, Dk. Brn 6= Not used 7= Not used 8= Coolant Temp., Torquise 9= Illumination, Lt. Gray 10= LH. Turn Sig., Lt. Blu 11= RH. Turn Sig., Dk. Blu 12= Empty 13= Seat Belt, Yel. 14= Fuel Sender, Pink 15= Brake, Lt. Brn/Wht 16= Serv.Eng.Soon, Drk. Brn/Wht 17= 12V Ign., Pnk/Blk 18= VSS from PCM, Lt. Blu/Blk When I did my '80 LS swap, I used the '90 Burb cluster, and the only wires that did not have to be swapped were #'s 1, 4, and 13

11-05-2016, 07:48 AM	#10
chuychevy82lwb Registered User Join Date: Mar 2013 Location: Taylor tx 76574 Posts: 135	Re: 1991 electric suburban gauges into a square ls swap Ok sweet and yes i repined it and its a 82 silverado with a 91 suburban gauge cluster __________________ 82 lwb lsx 5.3/4l60e 12 bolt rear lambo electric blue/ hummer black with house of color flake same colors on the inside with all new upholstery n 22s. " Who said longbeds cant look good "



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