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73-87 Chevy _ GMC Trucks => Interior & Equipment => Instrumentation => Topic started by: Zeked on April 27, 2013, 10:18:08 PM

Title: Wiring a sunpro aftermarket tach
Post by: Zeked on April 27, 2013, 10:18:08 PM
I have a sunpro 1000 tach that I have surgically inserted into the dash panel.

Now I have a cool looking dash with 4 wires dangling down.

White. To lamps

Black to ground

Red to Switched Power

Green ???????????

I have a 87 short step with the 350 and TBI. Bone stock


Should the green go to the distributor, or to the neg coil?
If the dist, where on that muther should it attach?
A six pac for anyone withh pics.........


Zeke
Title: Wiring a sunpro aftermarket tach
Post by: Shawn0331 on April 27, 2013, 10:21:30 PM
On my 86, there is a spot on the HEI distributor that is labeled "Tach." Plug the wire into that and you're good to go.
Title: Re: Wiring a sunpro aftermarket tach
Post by: bd on April 27, 2013, 10:31:52 PM
The green wire connects to the "White" distributor pulse wire off the coil (see image).   ;)
Title: Re: Wiring a sunpro aftermarket tach
Post by: blazing816 on April 29, 2013, 08:22:20 AM
Quote from: Shawn0331 on April 27, 2013, 10:21:30 PM
On my 86, there is a spot on the HEI distributor that is labeled "Tach." Plug the wire into that and you're good to go.

X2....that's where I put mine.
Title: Re: Wiring a sunpro aftermarket tach
Post by: bd on April 29, 2013, 11:06:35 AM
Quote from: blazing816 on April 29, 2013, 08:22:20 AM
Quote from: Shawn0331 on April 27, 2013, 10:21:30 PM
On my 86, there is a spot on the HEI distributor that is labeled "Tach." Plug the wire into that and you're good to go.

X2....that's where I put mine.

87 TBI used a divorced coil that bolted to the manifold.  On 86 & prior the coil was married to the cap.
Title: Re: Wiring a sunpro aftermarket tach
Post by: Zeked on April 29, 2013, 08:31:36 PM
So I use the taped off tach wire, right?   Does anyone know what the connector number is? 

Thanks

ZekeD
Title: Re: Wiring a sunpro aftermarket tach
Post by: bd on April 29, 2013, 08:52:27 PM
Quote from: Zeked on April 29, 2013, 08:31:36 PM
So I use the taped off tach wire, right?   Does anyone know what the connector number is? 

Thanks

ZekeD

Use the taped off tach wire.  Locate a mating OE-type connector at your local parts house.