Here is mine. This is the only picture I have now but can get a couple tomorrow if you need them. I have a spare tach here somewhere if you need pictures of it.
James
-- Edited by jfkheat on Saturday 24th of March 2012 06:02:51 PM
Here is mine. This is the only picture I have now but can get a couple tomorrow if you need them. I have a spare tach here somewhere if you need pictures of it.
James
-- Edited by jfkheat on Saturday 24th of March 2012 06:02:51 PM
Hi guys, kind of resurrecting an old post but I'm hoping one of you or James here can help.
My friend has an actual 68 SD 396 Beaumont but the previous owner did something with the wiring and the tachometer is no longer hooked up. Can someone show me a pic of the back of their tach showing which terminal is for what? All I see is one big terminal and three very small one. They may not even be terminals but I'm assuming there must be at least two wires to hook up, tach signal, power to the unit somehow???? Please help.
Also, he has an HEI distributor, is this a problem with these tachs?
Here are the instructions for the aftermarket unit not too sure if it pertains to your situation. If you are running an MSD box with the tach output you will probably need a tach adapter, either the MSD 8920 or possibly the 8910. I would look into it a bit more before you buy either one or the other though.
Dash Tach Installation Instructions 1970-72 BUICK "A" BODY TASH TACH
1964-72 PONTIAC "A" BODY DASH TACH
1969- 72 PONTIAC "G'~ BODY DASH TACH 1968-72 OLDSMOBILE "A" BODY DASH TACH 1963-64 CHEVY NOVA DASH TACH
Install your new tach in place of your clock or block off plate using appropriate service manuals as necessary.
Remove the wiring harness from the plastic bag and install this harness to the rear of the tach. The plastic connector is polarized to prevent improper installation.
Plug the orange or red wire with the black plastic end connector (part of above mentioned harness) into the fuse panel opening marked "ign", or connect it to an ignition controlled wire under your car's dash.
The brown or gray wire with the metal ring terminal ( part of above mentioned harness) passes through the firewall and connects to the negative terminal of the coil, or the tach port of an HEI.
If your new tach is supplied with a lighting harness, use the included blue plastic connector (from the bag that you removed the wiring harness) to connect that tach light harness to your car's under dash harness. The wire leading to the light on your radio or heater control light (both usually gray) is a good place to make this connection. The black wire, which is part of the light.harness, grounds the tach mechanism and the lamps, and is connected to agood ground under the dash. Different years or applications, such as Nova, require different grounding procedures.
