I Have a Problem With My 1975 Plymouth Duster
Two fusible links is an indication that your system is not quite the same as most of the previous years, or yours came with an option with a different wiring.
The best diagrams will be in the '75 factory service manual. Posting photos may help too.
That said..
engine off...key off..
Power from the battery will be available to everything in the main circuits and the circuits that are always hot:
This includes the headlights - that are on circuit breaker (terminal B1 on your switch)
It includes half of the fuse box, including the fuse(s) for the dome, hazzard, parking and stop lights.
So. With voltmeter or test light, follow the power feed(s) from the battery. Each junction should be at battery voltage. You can do a check at the Alternator output stud (usually marked Batt on the casting) since its connected.
It may pass this check (battery voltage each junction) and still have poor connections, but its a good way to look for a break.
The basic scheme '73 (through?) is like this. (not shown is the ignition switch connector but its important)
Two fusible links is an indication that your system is not quite the same as most of the previous years, or yours came with an option with a different wiring.
The best diagrams will be in the '75 factory service manual. Posting photos may help too.
That said..
engine off...key off..
Power from the battery will be available to everything in the main circuits and the circuits that are always hot:
This includes the headlights - that are on circuit breaker (terminal B1 on your switch)
It includes half of the fuse box, including the fuse(s) for the dome, hazzard, parking and stop lights.
So. With voltmeter or test light, follow the power feed(s) from the battery. Each junction should be at battery voltage. You can do a check at the Alternator output stud (usually marked Batt on the casting) since its connected.
It may pass this check (battery voltage each junction) and still have poor connections, but its a good way to look for a break.
The basic scheme '73 (through?) is like this. (not shown is the ignition switch connector but its important)
