Fuse Blows!

Do you have a 74 service manual? Here's what it says about fuses

View attachment 1716006306
No service manual, just the wiring diagram. I don't remember where I got it, but I have this info. I'm 63, getting CRS. :rolleyes:
I would pull the TS flasher, and take a look at your backup harness path. Either auto or stick, will have a harness down the firewall, over the transmission hump, and with auto, connect to the 3 pin neutral safety/ backup switch, and with a stick just connects to the 2 pin reverse switch on the transmission

If that gets you nowhere, "I guess" pull the connector off the heater/ AC controls. But the short MIGHT be some odd thing in the harness before "it gets" to any of that.

How about radio? Pull that connector FOR SURE especially if it is aftermarket
I already pulled the flasher, but that would get juice when the t/s are on. The fuse blows just after turning the key on, b/u and t/s off.
It was a 3 on-the-tree car, it's a 727 now. I wired it like a factory auto trans car. It worked fine until a couple days ago, but I'll check it.
The heater wiring isn't connected to the controls, no heater in the car anymore. I'll check it too.
I forgot about the radio. But that's because it's a radio delete car. Nothing but the "Internal Combustion Orchestra". :)
No reverse indicator light either.
All this is why I'm going to disconnect the steering column harness (to the t/s switch), and the b/u light harness, one at a time, to see if I can isolate it.
Where this circuit gets power from is what's hard for me to find on the diagram. I'll look closer at that, too. I think the short is along that part, but who knows?
Not sure where You are, or if You are Worried for Certain Reasons, but hand signals are legitimate ( where I am) Now using them for brake lights? These days, especially after dark? I don't know about that, and your tag light bulb is a Must... I've been playing with these cars since a big block Was a daily driver. And Raised a LOTTA HECK!!!!!!! These Days? EVERYONE has a phone, and I Don't like stopping and Talking to People. Dell (67Dart273) is one of the Baddest electronics Men here... So that's all I got Brother!
I'm in Very South Jersey, per my avatar. :poke: :lol:

Hand signals are probably legal, but confusing sometimes. Could be a lot of people at the show.
Pull out the bulbs.
The fuse blows without the b/u's or t/s's on. I'll keep it in mind as I progress.
If the fuses keep blowing, send them over here to my wife, she needs a few lessons in that area...
It's a memory issue; she was probably good at it before you got married.

Thanks everyone. I'll get to this later today.