Ok, so here is the deal, I've got a couple of gauges that I have all ready to go. All I have left to do is run the harnesses from under the dash up behind everything to the A-pillar. I can't believe i'm having this much trouble though. I even have another wire that I threaded down from the top to tape the harness on to, but it seems like the harness is too big to fit. Any ideas? I know it can be done, I had a tach on there earlier that was hooked up that way, but I cannot seem to duplicate the way it was done.
Thanks in advance for any ideas!

 

Instead of allowing the wires to bundle up, flatten the group out....then thread them through....