Tac Wiring Problem

[ccope]

Tac wiring issue I need assistance with. All other gauges are operable i.e., speedo, fuel, temp, oil pressure. I realize the tac has a separate wire(s) than the cluster harness but with all others working it surely is grounded. Two wires coming from back of tac, brown and red. Red is in ignition (hot) and brown is through firewall to HEI distributer. 71 chevrolet, 383 stroker with a AAR wiring harness built to specs. When I plug in the brown wire to the to the distributer it completely kills the engine. Unplug it and all is good. I have a yellow wire attached to the furtherest connection on the starter solenoid and a purple wire on the most inside connection (nearest engine) and the hot wire of course in the middle that runs to the positive side of the battery. The yellow and purple run back into the wiring harness, up the firewall and then split out to the distributer where a pink wire is plugged into the distributer and reads 14.4 volts. There is a dark blue wire with an odd end connector that I have no clue about. Any assistance would be surely appreciated. Pics would be valuable.

Thanks,

Sorry, I don't have a photobucket set up yet so I have no available pics to post. I will get to this at some point.

[buckskins4ever]

are you using a 2 wire plug on the HEI or just using 2 female connectors? Really sounds like you are getting a grounding problem.

[ccope]

Two female connectors. If I understand two wire, I have the pink wire on the battery side which when tested reads 14.4 wires. I don't understand why it is grounding out.

[VetteVet]

Here are two diagrams of the engine compartment showing the stock wiring and the HEI wiring. They don't show the tach connection only the red wire for the dizzy power.
Notice the dark blue wire goes to the oil pressure sender for the idiot light. It is the only dark blue wire in that area that I can remember.






You don't need photobucket to post pictures. if you notice the bottom of a new post it says "go advanced". Scroll down to the Manage Attachments button, just click on that and a browse window will open. Click on the top browse button for your first picture and you'll see a search box on top of the browse window which will let you go to your computer hard drive where you store your pictures ,usually My Pictures, and you can click on the picture and highlight it and then click on upload and the picture will show in your post.

[ccope]

When I connected the plug to the back of the tac one of the three connections on the tac seemed loose. I may have to remove the cluster and see if this is my problem.