no tail lights 72 valiant

elvaliant66 said
i need your guys help.so my headlights,turn signals,brake,high beam,dome lights work but i got no tail lights.i checked my fuse box all the wires that lead to the headlight switch.and still nothing ,right when i put a new fuse in and i turn on my parking lights on the fuse blows out.i unplugged the tail light section of the harness by the left kick panel and tried a new fuse and as i pulled the switch to turn on the lights it blew out again...so i know for sure its not the sockets at the tail lights shorting out. the wierd thing is that sometimes the fuse doesnt blow out right away ,when it doesnt blow out i wiggle the wires by the fuse box and the headlight switch and they work fine . so i was glad they were working but then as i drive down a couple blocks the fuse blows out again:wack::wack:. ..can someone help me out?

It's going to be a pain but what I think you have is a high resist joint. This will cause heat.
Look for blackend or possible cooking of wire insulation. In my AP5 the wiring harness had a fusible link. In the wiring diagramme all it showed was a little rectangles box or just a connection of a few wires in the harness. This went on the car when I was a kid. The car was nearly lost as the harness went up in smoke.
If you can get access to a thermal image camera that would help out quickly.
The wire may even be broken in the insulation.
The fuse is not blowing straight away because it's not a dead short.
Load from the lights causes a current draw the bad joint drags more current and it becomes too much for the fuse.
If you can get a thermal image camera try going up one or two fuse sizes and look at the wiring to see for a hot spot. It may even be in the gauge cluster. The stop lights and instruments lights use the same fuze. This tells you that there are no tail lights if your gauges don't light up.
Or the wire in the harness has rubbed through the insulation and is just touching the body some ware often those metal bendy tabs behind the dash to hold the harness does this.
Good luck.
I just remembered and I'm not familiar with your car directly but check the multi wire plug on the gauge cluster on my car the pin on the back of the cluster got a dry joint and I had to re solder it onto the printed board it did exactly what your saying.