Elec. problems 74 Dart

Stoplights..........most all stoplights on U.S. cars of that era went through the turn signal switch.

So check right at the stoplight switch or at the turn signal switch connector

If you are getting stoplight power there, going INTO the switch, AND if the turn signals function, then it's a problem in the column signal switch.

Temp.........Does the fuel gauge work?

Did you try shorting the sender wire to ground with key "in run" and see if the gauge deflects?

If the fuel gauge works, possible problems are.....

Broken connector (insided) the molded sender connector

Corrosion / loose in bulkhead connector

Poor connection at the instrument cluster PC board pins and harness connector

Loose / corroded stud / nuts on the gauge to panel

If the fuel gauge does NOT work this could get deeper