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#1 |
Registered User
![]() Join Date: Apr 2011
Location: Hartford CT
Posts: 223
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Electric speedo question
Hey guys - I snagged a Burb/Blazer electric speedo for my 5.3 swap a while ago and I'm getting around to installing it in my cluster - I noticed in other pics that when installed there is a box behind the cluster - is that the calibration box? I bought the speedo off eBay, and it did not come with the box.
Questions are: 1) Am I right in assuming that's the calibration box? Or is it for the cruise control like the ones on mechanical speedos? 2) Where can I get a calibration box? Speedo in question: ![]() Circuit board for the speedo with 4 pins, presumably to go to the cal box: ![]() Thanks for the help
__________________
-Steve ![]() 1980 GMC C15 Sierra LWB Dark Carmine Red/Carmine Int Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011) Now: 5.3/4L60E, 2.73 12-bolt open rear |
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#2 |
Registered User
![]() Join Date: Apr 2011
Location: Hartford CT
Posts: 223
|
Re: Electric speedo question
OK in doing a little bit more research, apparently the PCM will be a "calibration box" so to speak, now the question becomes:
How can I wire up the electric speedo to work with the PCM? Thanks!
__________________
-Steve ![]() 1980 GMC C15 Sierra LWB Dark Carmine Red/Carmine Int Was: 250/3spd (1980-88), then a 305/TH350 (1988-2011) Now: 5.3/4L60E, 2.73 12-bolt open rear |
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