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#1 |
Registered User
Join Date: Oct 2017
Location: Redding California
Posts: 3
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Re: 67-72 Electric speedo
10-4 will keep on rubbing.
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#2 |
Registered User
![]() Join Date: Jan 2018
Location: Durham, North Carolina
Posts: 782
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Re: 67-72 Electric speedo
Where are folks buying their 5/8” wired bulb sockets? I bought the ones referenced here (T3.25 from Super Bright LEDs) and they were 1/2”. I have since bought 3 other sets over the course of a month and 1 set of 5 fit but the guy doesn’t have anymore. I still need 4 and have searched to the wnd of the internet I feel. Thanks for any info.
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#3 |
Registered User
![]() Join Date: Dec 2013
Location: Dunwoody,Ga
Posts: 443
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Re: 67-72 Electric speedo
I bought these. They pop in but are pretty tight on the holes that have tabs for tubes - like turn signals.
http://www.classicpartsusa.com/produ...xoCzQgQAvD_BwE |
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#4 |
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![]() Join Date: Jan 2018
Location: Durham, North Carolina
Posts: 782
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Re: 67-72 Electric speedo
The guy I bought my set that fit from has more available now. They are 2 wire which I preferred. The only "modification" needed is that they are loose as the space between the tabs and the round part of the housing is too far apart. I bought a pack of rubber water hose seals for $2 at Tractor Supply that fit perfectly to keep the tabs snug against the underside of the housing. Good guy to work with and he notified me as soon as he got more in:
https://www.ebay.com/itm/5-T10-Twist...784e:rk:1:pf:0
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#5 |
Registered User
Join Date: Oct 2018
Location: Menasha, WI
Posts: 2
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Re: 67-72 Electric speedo
Pm sent about purchasing the printed gauge face stuff to do the mod.
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#6 |
Registered User
Join Date: Oct 2018
Location: Menasha, WI
Posts: 2
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Re: 67-72 Electric speedo
Payment sent to ls1nova71
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#7 |
Registered User
Join Date: Nov 2018
Location: Lodi CA
Posts: 1
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Re: 67-72 Electric speedo
How do I get the kit
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#8 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#9 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,560
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Re: 67-72 Electric speedo
I want one too!
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#10 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#11 |
Registered User
Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,560
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Re: 67-72 Electric speedo
So my donor car 99 Trans Am has a round pattern needle driven speedo but has a tach. Would this one work?
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#12 |
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![]() Join Date: Jan 2018
Location: Durham, North Carolina
Posts: 782
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Re: 67-72 Electric speedo
I am having a similar issue, I have 00' 4.8L with 20" wheels/50 tires, 3.08 gears, and NV3500 manual trans. My speedo is about 2x what it should be (reads 90 at 45). Does this need to be adjusted with a tune due to the tall trans/gear/wheel size?
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#13 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
I'm thinking its due to a difference in speed sensors. It should be fixable in the tune though, you would have to talk to your tuner to be sure.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#14 |
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Location: Durham, North Carolina
Posts: 782
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Re: 67-72 Electric speedo
I am having it tuned Thursday so hopefully that resolves the issue. If I have the wires on the VSS backward (the pigtail I bought just had 2 black wires), would this cause the speedo to read high or would it not read at all? The pigtail on the original harness had the purple vss wire on the right so I put the right black wire to the VSS lead to my speedo so I assume it is correct but thought I would ask, thanks.
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#15 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
If those two wires are switched it wont make any difference.
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#16 |
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Join Date: Feb 2012
Location: Ruskin Florida
Posts: 4,560
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Re: 67-72 Electric speedo
Any updates for this?
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70 swb 4x4 406sbc 700r4 203/205 d60/14blt locker yadda yadda http://67-72chevytrucks.com/vboard/s...88#post6935688 Yeller 72 Blazer 2wd conversion project "No Daggum Money" http://67-72chevytrucks.com/vboard/s...d.php?t=550804 LS1-T56 3.73 LSD super budget build Blanco-2014 Sierra SWB https://67-72chevytrucks.com/vboard/...d.php?t=810350 |
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#17 |
Registered User
Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
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Re: 67-72 Electric speedo
It's been quite some time since I've posted on this page, but I've still found a lot of useful info including the write up on this Speedo conversion, so thanks for that. I'm hoping I can get some help wiring this thing. I've tried to follow the picture but it's a bit difficult with all the wires bundled together. Thanks again for the write up and any help is much appreciated. The bottom picture is what I have so far.
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Eric 70 CST10 long bed in pieces also factory air and cruise(the project) 18 Silverado crew cab 5.3 4x4 My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166 |
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#18 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
It looks as though you have most of it figured out. You just need to tie the dash lights together and add ignition power, ground and a signal wire for the gas gauge. Is there something specifically you need to know?
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#19 |
Registered User
Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
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Re: 67-72 Electric speedo
Do I tie in the turn signal lights with the rest of the dash lights? It looks like you grounded something above the fuel gauge? I was thinking it might be easier if I wire my plug into the truck harness first and then follow it over the the gauges? The ignition power needs to run to each gauge?
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Eric 70 CST10 long bed in pieces also factory air and cruise(the project) 18 Silverado crew cab 5.3 4x4 My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166 |
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#20 | |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
Quote:
You can wire the truck side first if that makes it easier for you, it doesn't matter which you do first. Yes, all the gauges that are electric will need their own ignition power.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#21 | |
Registered User
Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
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Re: 67-72 Electric speedo
Quote:
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Eric 70 CST10 long bed in pieces also factory air and cruise(the project) 18 Silverado crew cab 5.3 4x4 My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166 |
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#22 |
Registered User
Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
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Re: 67-72 Electric speedo
So I think I have this figured out, but I'm unsure of where the red and green wire go?
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Eric 70 CST10 long bed in pieces also factory air and cruise(the project) 18 Silverado crew cab 5.3 4x4 My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166 |
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#23 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
You mean pink and green? There are pins that stick up on the back of the circuit board, and by them they are labeled what they go to. The pink goes to Ignition power and the green goes to Speedometer out put. If I remember correctly they are labeled IGN and SPD.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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#24 | |
Registered User
Join Date: Jan 2009
Location: valparaiso,in
Posts: 730
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Re: 67-72 Electric speedo
Quote:
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Eric 70 CST10 long bed in pieces also factory air and cruise(the project) 18 Silverado crew cab 5.3 4x4 My build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=402166 |
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#25 |
Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 67-72 Electric speedo
I'm not sure what that wire labeled ammeter is, but I probably wouldn't use that for ignition power. The gauges will have power already going to them, so you would just need to use that wire. The speedometer wire would come from the PCM.
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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