First look up behind the dash for a blue triple bullet style connector. The soft rubber type. Check it with a test light but that should be switched power. Don't remember off hand if it's hot in only run, or both start and run.
Best thing to do is probe the fuse panel with a test light or DVOM. Some fuses are hot in accy and run, run only, or hot at all times.
Aren't those for blade style fuse blocks only though? If I recall my 77 would use glass fuses stillView attachment 53295
Discovered these little guys last time I did a dash cam install. No more stripping and soldering, no more shoving bare wire ends into fuse terminals.
Plug in and use a DVOM to check the lead is hot under the ignition switch conditions you desire. Only real limitation is to make sure you don't set it up to draw more amps through that fuse socket than it was designed for.
There are little brass pieces that can add 1/4" spade terminals to glass fuses, which you can then connect a wire to.Aren't those for blade style fuse blocks only though? If I recall my 77 would use glass fuses still
Should be no problem running the coil side of a relay. They pull very little amperage.So my radio wire going to the fuse box is not being used. This is 5 amps, and shared with a 20 amp fuse that powers the a/c clutch, turn signal, and back up lamps. Is this wire and 5 amp fuse in its place sufficient to provide switched power to a relay that will then send power to a small clean auxilliary fuse block?
The instructions only show for older chryslers while KEEPING the factory electronic ignition box, which I am wanting to eliminate.Check your mfg. website as most have instructions for what your doing with there products.
Yes, that is correct. On a 77 aspen J2 *Blue which is IGN 1 comes from the ignition switch, but J3 *Brown begins at the starter relay, not at the actual ignition switch...thus, my concern is if I tie them together, then there may be a backfeed to the starter when key is in run. I have to test for this, but the harness is out of the car and I wanted to get it all sorted and put together neatly before reinstalling into the car.All I've seen online is you combine the start and run wire together off the starter relay to power those newer ignition boxes from. You might aswell try that and see what happens. It's the same as when you connect both sides of the ballast resistor together to get it running short term when that fails.
Where did you get these from ?There are little brass pieces that can add 1/4" spade terminals to glass fuses, which you can then connect a wire to.
View attachment 53298
There are also these adapters that you can use to replace the glass fuse, then plug a blade style fuse tap into.
View attachment 53297
Might depend on the clearance in your fuse area, though. If you use the 1/4" brass terminal type, be sure to put it on the negative side of the fuse, so power will be lost if the fuse blows. Or, put it on the positive side, and splice in a fuse holder and a separate fuse for the accessory.
For the glass style fuse taps you probably have to pick them up online. The auto parts store has the more modern ones.Where did you get these from ?