How do I wire in electric speedometer with 700r4 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ethan341 · 10-21-2018, 07:17 PM

I have a TBI 350 with a 700r4 in my 69 c10 from a 1990 c1500 and have a few questions. First there is 1 purple wire and 1 yellow twisted together from the tailshft which I assume is for the vss? To tie this in with the ECM do I just ground one and and attach the other to the vss wire on the ECM? For an aftermarket electric speedometer do I splice off of the wire to the ECM? Any help would be greatly appreciated.

10-21-2018, 07:17 PM	#1
Ethan341 Registered User Join Date: Jun 2018 Location: Calgary Posts: 10	How do I wire in electric speedometer with 700r4 I have a TBI 350 with a 700r4 in my 69 c10 from a 1990 c1500 and have a few questions. First there is 1 purple wire and 1 yellow twisted together from the tailshft which I assume is for the vss? To tie this in with the ECM do I just ground one and and attach the other to the vss wire on the ECM? For an aftermarket electric speedometer do I splice off of the wire to the ECM? Any help would be greatly appreciated.



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