so i searched

[oatsk5]

And didnt find any info on wirirng a sun pro tach to an 89 tbi engine now its been a while since ive done this install this tach has
one red wire
one black wire
one green wire
one blue wire

im thinking the blue would replace the white its used and it was free
now the question is were do i run the green as this dist is dif than a hei

 

[87BrnRsd]

Ok....If I was closer than 2 hrs from my truck I could tell you exactly. Its been so long since I wired mine in that I dont really remember. Im guessing black is ground, red is hot wire, either green or blue goes to the distributor, and the remaining blue/green wire is for a light bulb. One could possibly not be necessary or be designed to go to a dimmer switch for the lights.
-Harrison

 

[savagek5diesel]

i just wired my autometer the other day and didn't really find was i was looking for on here either. There should be a recent thread here in the garage from within the week from me asking and i did get a couple responses. But On my autometer, green went to the tach, red is your ignition power, black was ground, and my illumination wire was white. To test it, get two jumper wires, wire the ground to your chassis or off the negative on the battery. Then take your second jumper wire and put it on your red wire then to the positive on the battery, if the tach drops to zero, then thats your ignition. If you hook it up to your blue wire and to the postive and your light turns on, then thats pretty obvious, and if you do the same for the green wire and nothing happens....... then thats your dist. wire.

But now my question to you is..... are you asking WHERE does your distributor wire hook up to?

 

[NEK5]

green goes to dizzyy, red power, black ground, blue illumination

 

[dyeager535]

green goes to dizzyy, red power, black ground, blue illumination

So IIRC, there will be a white "spare" wire or terminal on the coil harness that will be the distributor feed, and the red should be an *ignition switched* terminal.

You shouldn't need to cut anything to wire this up, your fuse panel has more than enough empty slots to do what you need it too, except maybe dimming with the headlights. I *think* there is even an empty slot on the fuse panel for this, but I can't recall off the top of my head.

TBI wiring diagrams have been posted, can't recall if the fuse panel portion is there as well.